- **Four Independent 32‑bit Counters:** Each channel supports up/down counting with 32‑bit resolution (maximum count FFFFFFFFh). - **High‑Speed Pulse Input:** Accepts LVTTL‑level signals up to 10 MHz (50 % duty cycle). - **Two‑Phase and Single‑Phase Operation:** Supports two‑phase (A/B/Z), single‑phase, and single‑phase with gate control modes. - **Non‑Isolated LVTTL Input:** Direct connection to TTL/LVTTL devices such as encoders and linear scales. - **Digital Filter:** Adjustable per channel (0.1 µs – 1.6384 ms) to suppress noise and chattering. - **Programmable Timer:** 1 ms – 6553 ms (1 ms increments) for timing and sampling control. - **Bus Master Transfer (DMA):** Enables high‑speed data transfer between board and PC memory without CPU load; up to 80 MB/s (max 133 MB/s). - **Interrupt Generation:** One interrupt with multiple factors (count match, count error, sampling factors, carry/borrow, timer). - **Control I/O:** Four LVTTL control inputs and four LVTTL control outputs per board. - **Test Pulse Output:** 100 kHz fixed frequency for verification and diagnostics. - **Sampling Functions:** Internal/external sampling start/stop triggers and external clock input up to 10 MHz. - **Compatibility:** Connector pin assignment compatible with CNT32‑4MT(LPCI) and CNT32‑4MT(CB). - **Low Profile Design:** Fits compact systems; includes standard‑height bracket for full‑size PCIe slots. - **Optional Differential Input Conversion:** Convertible to differential input using optional terminal CTP‑4D and cable CNT‑68M/50M. - **Software Support:** Includes API‑PAC(W32) driver library for Windows; compatible with Visual C++, Visual Basic, Delphi, C# .NET, etc. - **LabVIEW Support:** VI‑DAQ library available for National Instruments LabVIEW integration.

Manufacturer: Contec

Category: Counter/Timer PCIe

- **Eight Independent 32‑bit Counters:** Provides 8 channels of 32‑bit up/down counting, each capable of two‑phase (A/B/Z) or single‑phase counting with gate control. - **High‑Speed Counting:** Supports input frequencies up to **10 MHz** (duty cycle 50%) for both TTL and differential inputs, enabling accurate high‑speed pulse measurement. - **Two‑Phase Signal Support:** Compatible with incremental rotary encoders, linear gauges, and other pulse‑output sensors requiring A/B/Z phase counting. - **Bus Master Data Transfer:** Incorporates a **Bus Master Transfer** function that allows large sampling data to be transferred directly to PC memory without CPU overhead, ensuring high throughput and low latency. - **Synchronous Control Capability:** Equipped with **Synchronous Control Connectors (SCC)** that enable synchronized operation of up to **16 boards** simultaneously, ideal for multi‑axis or multi‑sensor systems. - **Differential Input Disconnection Detection:** Automatically detects signal disconnection during differential input operation and issues an error alarm (status, interrupt, or external output). - **Digital Filtering:** Built‑in digital filter prevents false counts caused by noise or contact chattering, ensuring stable and accurate counting. - **Interrupt Functionality:** Supports one interrupt per board with multiple trigger factors: count match, count error, sampling factors, SCC error, carry/borrow, and timer events. - **Programmable Timer:** Integrated timer selectable from **1 ms to 6553 ms** in 1 ms increments for time‑based counting or sampling control. - **Surge Protection:** Input interface includes Zener diode protection to prevent damage from voltage surges or transient currents. - **Software Support:** Compatible with **Windows** and **Linux** via CONTEC’s API‑TOOL driver suite; also supports **LabVIEW** through the VI‑DAQ library. - **RoHS Compliant:** Environmentally friendly design meeting RoHS directives for hazardous substance reduction.

Manufacturer: Contec

Category: Counter/Timer PCIe

- **12 Programmable Timer/Counter Channels:** The AX5500P incorporates **four Intel 8254-compatible programmable interval timer (PIT) chips**, each providing three independent 16-bit counters, for a total of **12 timer/counter channels**. These channels can be configured for event counting, frequency generation, pulse width measurement, or square wave output. - **24 TTL Digital I/O Lines:** The card provides **24 channels of TTL-level digital input/output**, emulating the functionality of an **Intel 8255 Programmable Peripheral Interface (PPI) in Mode 0**. This allows for flexible digital signal interfacing, including control signal monitoring, switch input reading, and device actuation. - **PCI Bus Interface:** Fully compliant with the **PCI local bus standard**, the AX5500P supports plug-and-play configuration and automatic resource allocation, eliminating the need for manual jumper or DIP switch settings. - **Dual Connector Interface:** Equipped with both a **DB37 male connector** and a **50-pin flat cable header**, the card offers versatile connectivity options for external devices, sensors, and control modules. - **Compact Form Factor:** The board measures **175 mm × 97 mm**, allowing installation in standard PCI slots of desktop PCs or industrial computers. - **Industrial-Grade Design:** Built with high-quality components and robust PCB design, the AX5500P ensures long-term reliability and stable performance in demanding industrial environments. - **Software Compatibility:** The card is compatible with standard operating systems supporting PCI devices and can be integrated with various data acquisition and control software platforms.

Manufacturer: Axiom

Category: Counter/Timer PCI

- **Four Independent 24-bit Counters:** Each channel supports up/down counting with a maximum count value of FFFFFFH (16,777,215 in binary). - **Dual Input Modes:** Selectable **photo coupler isolated input** (5–12 VDC) or **TTL-level input** (5 VDC) per channel via software command. - **Two-Phase Signal Support:** Capable of counting quadrature (A/B phase) signals from rotary encoders or linear scales, as well as single-phase pulse inputs. - **Programmable Timer:** Built-in timer generates periodic interrupts at user-defined intervals (1 ms to 200 s). - **Interrupt and Match Output:** Each channel can issue an interrupt or one-shot pulse output when the counter value matches a preset comparison value. - **Digital Filtering:** Adjustable digital filter (0.1 µs to 1056.1 µs) per channel to suppress noise and contact chattering. - **General-Purpose Inputs:** One general-purpose input per channel, available in both TTL and opto-isolated configurations. - **Photo Coupler Isolation:** Provides electrical isolation between external devices and the board, enhancing noise immunity and protecting the host system. - **Software Support:** Bundled with **API-PAC(W32)** driver library for Windows and **API-CNT(LNX)** for Linux, enabling easy integration with programming environments such as Visual C/C++, Visual Basic, Delphi, and gcc. - **LabVIEW Compatibility:** Supported by the **VI-DAQ** library for National Instruments LabVIEW, allowing seamless integration into data acquisition systems. - **Universal PCI Interface:** 32-bit, 33 MHz PCI bus with universal keying (supports both 3.3 V and 5 V signaling environments).

Manufacturer: Contec

Category: Counter/Timer PCI

- **Four independent 24‑bit up/down counters** supporting single‑phase or two‑phase pulse inputs. - **Dual input modes:** differential line‑receiver input and TTL‑level input selectable per channel. - **High‑speed counting:** up to **1 MHz** for both differential and TTL inputs. - **Programmable timer:** allows periodic interrupt generation from **1 ms to 200 s**. - **Surge protection:** differential input section equipped with Zener‑diode surge suppression to prevent damage from voltage spikes. - **Digital filter function:** hardware‑based noise suppression to eliminate chattering and false counts. - **Counter coincidence output:** generates a pulse when a preset count value is reached. - **Interrupt generation:** triggered by count match or timer expiration for real‑time event handling. - **Compact PCI short‑size board:** 176.4 mm (L) × 107.0 mm (H). - **High reliability:** industrial‑grade components, RoHS‑compliant construction. - **Software support:** Windows and Linux drivers (API‑TOOL), and LabVIEW VI‑DAQ library for seamless integration with measurement applications. - **Connector compatibility:** 96‑pin half‑pitch connector compatible with CNT24‑4(PCI) and other CONTEC counter boards.

Manufacturer: Contec

Category: Counter/Timer PCI

- **Four Independent 32‑bit Counters:** Each channel supports up/down counting with 32‑bit resolution, suitable for incremental encoders, linear gauges, or pulse‑output sensors. - **Two‑Phase and Single‑Phase Counting:** Supports A/B/Z phase inputs for quadrature encoders or single‑phase pulse counting with optional gate control. - **High‑Speed Input Capability:** Maximum input frequency of **10 MHz (duty 50%)**, ensuring accurate counting of high‑frequency pulse trains. - **LVTTL Input Compatibility:** Accepts LVTTL‑level signals for direct connection to modern digital sensors and encoders. - **Bus Master Transfer Function:** Enables high‑speed data transfer between the board and PC memory without CPU overhead, improving real‑time performance. - **Low‑Profile PCI Form Factor:** Compact 121.69 mm × 105.68 mm board size, compliant with PCI Low Profile specification. Includes a standard‑height bracket for full‑size PCI slots. - **Programmable Timer:** Built‑in timer selectable from **1 ms to 6553 ms** in 1 ms increments for periodic sampling or timed interrupts. - **Interrupt Generation:** One interrupt line with multiple selectable factors: - Count match - Count error - Sampling factor - Carry/Borrow - Timer event - **Digital Filter Function:** Hardware digital filter prevents false counts due to noise or contact chattering. - **Counter Coincidence and Test Pulse Outputs:** Provides external output signals for synchronization, testing, or triggering external devices. - **Optional Differential Input Conversion:** Can be converted to differential input operation using optional **CTP‑4D** terminal and **CNT‑68M/50M** cable. - **Software Support:** Includes free Windows and Linux drivers (API‑TOOLs) and LabVIEW VI‑DAQ library for easy integration. - **RoHS and Lead‑Free Compliant:** Environmentally friendly design meeting EU RoHS directives.

Manufacturer: Contec

Category: Counter/Timer PCI

- **Eight 32‑bit Up/Down Counters:** Each channel supports two‑phase (A/B/Z) or single‑phase counting with gate control. - **High‑Speed Pulse Input:** Accepts TTL‑level or differential line‑receiver inputs up to 10 MHz (50 % duty). - **Bus‑Master Data Transfer:** Direct memory access (DMA) transfer between board and PC memory at up to 80 MB/s (maximum 133 MB/s) without CPU load. - **Synchronous Control Connector (SCC):** Enables synchronous operation of up to 16 boards (any combination of counter or motion controller types). - **Disconnection Detection:** Detects signal line disconnection during differential input and issues alarm output or interrupt. - **Digital Filter Function:** Programmable input filter suppresses noise and contact chattering for accurate counting. - **Counter Coincidence and Test Pulse Outputs:** Hardware outputs for event signaling and diagnostic testing. - **Interrupt Generation:** One interrupt line with multiple selectable factors (count match, count error, SCC error, carry/borrow, timer). - **Programmable Timer:** 1 – 6553 ms range, selectable in 1 ms increments, for periodic interrupt or timed operations. - **32/32 TTL Digital I/O:** Provides 32 inputs and 32 outputs for general‑purpose digital control. - **Surge Protection:** Input interface equipped with Zener diodes to protect against voltage surges and transient currents. - **Software Support:** Windows and Linux drivers (API‑TOOLs), and LabVIEW VI‑DAQ library for seamless integration. - **RoHS Compliant:** Environmentally friendly, lead‑free construction.

Manufacturer: Contec

Category: Counter/Timer PCI

- **8 Independent 16-bit Timer/Counters:** Each channel operates independently, allowing simultaneous timing and counting operations. - **2 Cascaded 32-bit Timer/Counters:** Two 16-bit counters can be cascaded to form 32-bit counters for extended range and precision. - **16 TTL-Level Digital I/O Channels:** Configurable as 16 inputs or 8 inputs and 8 outputs, supporting flexible digital control. - **High-Speed Operation:** Supports counting frequencies up to **10 MHz**, suitable for high-speed pulse and frequency measurement. - **Programmable Clock Sources:** Two on-board internal clock sources (0.5 MHz, 1 MHz, 2 MHz, 4 MHz) and eight external clock inputs for flexible timing control. - **Interrupt Management:** Jumper- and software-selectable interrupt sources with four interrupt channels (two counter-based and two digital input-based). - **Comprehensive Software Support:** Drivers for Windows 98/NT/2000/XP and LabVIEW 6.0/7.0, with sample programs in VB, VC, BCB, and Delphi. - **PCI Bus Interface:** Fully compliant with PCI specifications, supporting plug-and-play configuration and automatic resource allocation. - **EEPROM-Based Board Identification:** Each card includes a unique serial number stored in EEPROM for easy identification and configuration. - **Diagnostic Utility:** PCI Scan Utility for resource monitoring, serial number identification, and troubleshooting. - **Compact Design:** 185 mm × 110 mm PCB form factor for easy integration into standard PC chassis. - **RoHS Compliant:** Environmentally friendly design meeting Restriction of Hazardous Substances standards.

Manufacturer: Axiom

Category: Counter/Timer PCI

- **Ten Independent 16-bit Timer/Counters:** Each counter can operate independently or be cascaded for extended bit-width timing (up to 160-bit when all are cascaded). - **Cascaded 32-bit Timer:** Two counters (channels 11 and 12) are hardware-cascaded to form a 32-bit timer with a fixed 8 MHz base clock. - **Flexible Clock Source Selection:** Each counter can select its clock source from: - On-board 8 MHz oscillator - External clock input (up to 10 MHz) - Output of the previous counter (for cascading) - Cascaded 32-bit timer output - **Programmable De-bounce Filters:** Eleven channels of programmable de-bounce filters for external clock and interrupt inputs, with glitch rejection and programmable de-bounce clock up to 2 MHz. - **Dual Interrupt System:** Two interrupt sources—external interrupt input and cascaded counter output (counter #12)—allow flexible event handling and watchdog timer functionality. - **Digital I/O Capability:** - 8 TTL-compatible digital input channels - 8 TTL-compatible digital output channels - Programmed I/O data transfer mode - **High Reliability and Noise Immunity:** De-bounce filtering and TTL-level compatibility ensure stable operation in industrial environments. - **Plug-and-Play PCI Interface:** Fully compliant with PCI Local Bus Specification Rev. 2.0, supporting automatic resource allocation by BIOS. - **Software Support:** Comprehensive driver and library support for multiple operating systems and development environments, including LabVIEW®, HP-VEE™, and ActiveX (DAQBench™).

Manufacturer: Adlink Technology Inc.

Category: Counter/Timer PCI

- **12 Programmable Counters:** Four onboard 82C54 timer/counter chips provide twelve 16-bit down counters. Ten counters operate independently, while two (counters #11 and #12) are cascaded to form a 32-bit timer. - **Flexible Counter Configuration:** Each counter can be configured as independent or cascaded. Clock sources can be selected from internal 8 MHz, external input, previous counter output, or programmable CK1 source. - **Cascaded 32-bit Timer:** Counters #11 and #12 are cascaded by default, providing a 32-bit timer with a fixed 8 MHz base clock for extended timing range. - **Programmable Clock Sources:** Each counter can select from four clock sources: 1. Onboard 8 MHz clock 2. External clock (up to 10 MHz)

Manufacturer: Adlink Technology Inc.

Category: Counter/Timer PXI/PXIe/cPCI

- **CompactPCI 3U Eurocard Form Factor:** Fully compliant with PICMG 2.0 R3.0 CompactPCI specifications. - **Four Onboard 8254 Programmable Timer/Counter Chips:** Provides twelve 16‑bit down counters or frequency dividers. - **10 Independent 16‑bit Counters + 2 Cascaded Counters:** Ten channels can operate independently or be cascaded; two additional counters (11 and 12) are cascaded by default to form a 32‑bit timer. - **Flexible Clock Source Selection:** Each counter can select from four clock sources—external clock, previous counter output, CK1, or COUT10. - **Onboard 8 MHz Clock Source:** Provides a stable internal reference for timing operations. - **Programmable De‑bounce Filters:** Eleven channels of glitch‑filtered external clock and interrupt inputs, with programmable de‑bounce clock up to 2 MHz. - **Dual Interrupt System:** Two interrupt sources—external interrupt input and output of counter #12—allow flexible event handling. - **Digital I/O Capability:** 8‑channel TTL digital inputs and 8‑channel TTL digital outputs for control and monitoring. - **Rear I/O Connectivity:** 100‑pin SCSI‑II female connector for all I/O signals, including +5 V and +12 V power outputs with resettable fuses. - **Software Support:** Comprehensive driver and library support for Windows and Linux, including DAQPilot, DAQBench, LabVIEW™, MATLAB®, and PCIS‑DASK. - **Operating System Compatibility:** Windows 7/Vista/XP/2000/2003, Windows CE (on request), and Linux. - **Applications:** Event counting, frequency generation, pulse width measurement, watchdog timer, baud‑rate generation, and industrial automation.

Manufacturer: Adlink Technology Inc.

Category: Counter/Timer PXI/PXIe/cPCI

- **12 Programmable Counters/Timers:** Four 8254 chips provide twelve 16‑bit down counters. Default configuration includes two chips (six counters), expandable to four chips (twelve counters). - **Flexible Counter Configuration:** Each counter can operate independently or in cascaded mode. Clock and gate sources can be internal, external, or cascaded from other counters. - **Digital I/O Capability:** - 16 digital input channels (shared with external clock/gate lines). - 8 dedicated digital output channels. - All I/O are TTL‑compatible. - **Dual Interrupt System:** Two interrupt sources selectable via jumpers: - High IRQ from /COUT6 (reversed output of cascaded counter). - Low IRQ from COUT12 or external interrupt (ECLK10). - IRQ levels selectable from IRQ3–15. - **Clock System:** Internal 10 MHz oscillator with selectable frequency dividers (2 MHz, 1 MHz, 100 kHz). External or cascaded clock sources supported. - **Compact ISA Half‑Size Form Factor:** Dimensions 163 mm (L) × 108 mm (W). - **Connector Interface:** One 37‑pin D‑type female connector (CN1) for all counter, gate, clock, and DIO signals. - **Software Support:** Comprehensive C/C++ library and DLLs for DOS, Windows 3.1, Windows 95, and Windows NT. Functions include counter read/write, digital I/O, interrupt handling, and mode configuration. - **Applications:** Event counting, frequency generation, pulse width and frequency measurement, watchdog timing, industrial automation, and laboratory instrumentation.

Manufacturer: Adlink Technology Inc.

Category: Counter/Timer ISA

- **Six 16‑bit programmable counters/timers** using two 8254 chips (expandable to 12 counters with four chips). - **Flexible counter configuration:** each counter can operate independently or in cascaded mode for 32‑bit timing. - **Selectable clock sources:** internal 10 MHz oscillator divided to 2 MHz, 1 MHz, or 100 kHz; external clock input; or cascaded counter output. - **Gate control flexibility:** each counter can be gated by external signals, internal cascaded outputs, or default enabled. - **Dual interrupt system:** two independent interrupt sources selectable from internal or external events, assignable to IRQ3–15. - **Digital I/O capability:** 16 TTL‑compatible digital inputs and 8 TTL‑compatible digital outputs. - **Synchronized frequency measurement:** up to four channels can be measured simultaneously using internal gate synchronization. - **Compact half‑size ISA form factor** for AT‑bus systems. - **Standard 37‑pin D‑type female connector** for all counter, gate, clock, and digital I/O signals. - **Low power consumption:** +5 V @ 210 mA maximum. - **Software support:** C/C++ libraries and drivers for DOS, Windows 3.1, Windows 95, and Windows NT. - **Applications:** event counting, frequency generation, pulse width and frequency measurement, watchdog timing, and industrial automation control.

Manufacturer: Adlink Technology Inc.

Category: Counter/Timer ISA

- **Five Independent 16-bit Counters/Timers:** Each channel operates independently, allowing simultaneous measurement or control of multiple signals. - **Programmable Am9513APC Chip:** Utilizes the industry-standard Am9513APC programmable counter/timer device, known for its reliability and flexibility in timing and counting applications. - **High-Speed Operation:** Supports input clock frequencies up to 7 MHz, enabling precise timing and high-resolution event counting. - **Selectable Clock Sources:** Configurable for 1 MHz, 2 MHz, or 4 MHz internal clock operation, providing flexibility for different timing resolutions and performance requirements. - **Up/Down Counting and Cascading:** Each counter can operate in up-counting or down-counting mode, with the ability to cascade counters for extended bit-width counting (e.g., 32-bit or higher). - **Interrupt (IRQ) Capability:** Supports interrupt generation for event-driven applications, allowing efficient CPU utilization and real-time response. - **TTL-Level I/O:** Provides 8 input and 8 output TTL-compatible lines for direct digital interfacing with external devices, sensors, or controllers. - **Standard 50-Pin Connector:** Ensures compatibility with common ribbon cable assemblies and breakout boards for easy integration. - **Software Support:** Includes driver support for Basic, C, and Pascal programming environments, simplifying software development and integration. - **Compact Form Factor:** Designed with a 99 mm × 99 mm board size, suitable for compact system enclosures and embedded installations.

Manufacturer: Axiom

Category: Counter/Timer ISA

- **Ten Independent 16-bit Counters/Timers:** The AX5218 provides ten fully independent 16-bit counter/timer channels, implemented through two Am9513APC programmable counter/timer chips. Each channel can operate in various modes, including event counting, frequency measurement, pulse width modulation, and time interval generation. - **Dual Am9513APC Architecture:** The use of two Am9513APC devices allows for flexible configuration and high timing precision. Each chip manages five counters, enabling simultaneous operation across multiple timing tasks. - **High Clock Frequency Support:** The card supports clock frequencies up to **7 MHz**, with selectable internal clock sources of **1 MHz**, **2 MHz**, or **4 MHz**, allowing users to balance timing resolution and range according to application requirements. - **Up/Down Counting and Cascading:** Each counter can be configured for up-counting, down-counting, or cascaded operation, enabling extended counting ranges or complex timing sequences. - **Interrupt (IRQ) Capability:** The AX5218 supports interrupt-driven operation, allowing the host system to respond immediately to counter events, overflows, or specific timing conditions. This feature enhances real-time performance in control and monitoring applications. - **24 TTL-Compatible Digital I/O Lines:** The card includes 24 digital input/output lines compatible with TTL logic levels. These lines are implemented using an 8255-compatible interface operating in Mode 0, providing simple and direct control for digital signals. - **Dual 50-Pin Connectors:** Two 50-pin connectors provide access to all counter/timer channels, digital I/O lines, and control signals. The connectors are designed for easy integration with external devices, sensors, and actuators. - **Compact PCB Design:** With dimensions of **141 mm x 98 mm**, the AX5218 offers a compact footprint suitable for embedded systems, rack-mounted controllers, or desktop instrumentation setups. - **Software Support:** The card is supplied with driver libraries and example programs for **Basic**, **C**, and **Pascal**, facilitating rapid development and integration into custom applications. - **Industrial-Grade Reliability:** Designed by Axiom for demanding environments, the AX5218 features robust electrical design, stable timing performance, and long-term operational reliability.

Manufacturer: Axiom

Category: Counter/Timer ISA

- **Triple Counter/Timer Channels:** Three independent 16-bit counter/timer modules for event counting, frequency measurement, pulse generation, and timing control. - **64-Channel TTL Digital I/O:** Provides 32 TTL-compatible digital input channels and 32 TTL-compatible digital output channels for flexible signal interfacing. - **ISA Bus Interface:** Fully compatible with standard PC ISA bus architecture, supporting IRQ lines 2–7 for interrupt-driven operations. - **Dual 50-Pin Connectors:** Two high-density 50-pin headers provide easy access to all I/O lines, simplifying cable management and external device connections. - **Compact Form Factor:** Board dimensions of **190 mm × 99 mm**, optimized for standard ISA slots in industrial PCs. - **High-Speed Digital I/O:** TTL-level I/O supports fast switching and reliable signal integrity for real-time control. - **Programmable Interrupts:** Configurable interrupt sources for event-driven data acquisition and control. - **Industrial Reliability:** Designed for continuous operation in industrial environments, with robust PCB design and high-quality components. - **Flexible Software Integration:** Compatible with standard programming environments and driver libraries for DOS, Windows, and real-time operating systems (depending on manufacturer support).

Manufacturer: Axiom

Category: Counter/Timer ISA

- **Triple Counter/Timer Channels:** Three independent 16-bit counter/timer units provide accurate event counting, frequency measurement, and pulse generation capabilities. - **64-Channel Digital I/O:** Offers 32 TTL-compatible digital input channels and 32 TTL-compatible digital output channels for versatile signal interfacing. - **High-Power Output Capability:** Each output channel supports up to **32 V / 100 mA**, enabling direct control of relays, indicators, and other low-power actuators without external drivers. - **Adjustable Input Threshold:** Input channels 1–8 feature adjustable threshold levels (±12 V), allowing flexible interfacing with various logic levels and signal sources. - **Interrupt Support:** Programmable interrupt request (IRQ) lines from **IRQ 2–15**, enabling event-driven data acquisition and real-time control. - **Dual 50-Pin Connectors:** Two standard 50-pin headers provide convenient access to all I/O channels and counter/timer signals, simplifying cable management and integration with external devices. - **ISA Bus Interface:** Fully compatible with standard PC ISA bus architecture, ensuring stable communication and easy integration into legacy or industrial PC systems. - **Compact Form Factor:** Board dimensions of **190 mm × 99 mm** allow installation in standard ISA slots without mechanical interference. - **Industrial-Grade Design:** Built for high reliability and long-term operation in demanding environments, with robust electrical isolation and noise immunity.

Manufacturer: Axiom

Category: Counter/Timer ISA

- **Triple Counter/Timer Channels:** Equipped with three programmable counter/timer units for event counting, frequency measurement, pulse generation, and timing control. - **64 TTL-Level Digital I/O Lines:** Provides 32 digital input channels and 32 digital output channels, all operating at standard TTL voltage levels for compatibility with a wide range of sensors, actuators, and logic devices. - **ISA Bus Interface:** Designed for AT ISA bus architecture, ensuring compatibility with legacy industrial PCs and embedded systems that rely on ISA expansion slots. - **Interrupt Support:** Supports interrupt request (IRQ) lines 2 through 15, allowing flexible interrupt-driven operation for real-time event handling. - **Dual 50-Pin Connectors:** Features two 50-pin headers for convenient connection to external devices, terminal boards, or ribbon cables. - **Compact Form Factor:** Measures 190 mm × 99 mm, optimized for standard ISA slot installation while maintaining a compact footprint for space-constrained enclosures. - **Industrial Reliability:** Built with high-quality components and robust PCB design to ensure stable operation in industrial environments. - **Flexible I/O Configuration:** Each digital I/O channel can be individually configured for input or output operation, depending on the application requirements. - **Software Programmable:** Fully programmable through software for counter/timer modes, digital I/O direction, and interrupt configuration. - **Ideal for Automation and Control:** Suitable for machine control, process monitoring, test automation, and data acquisition systems.

Manufacturer: Axiom

Category: Counter/Timer ISA

- **Triple Counter/Timer Channels:** Three programmable counter/timer units for event counting, frequency measurement, pulse generation, or timing control. - **64 TTL Digital I/O Lines:** 32 digital inputs and 32 digital outputs, all TTL-compatible, enabling direct connection to logic-level devices. - **High-Power Output Capability:** Each output channel supports up to **32 V / 100 mA**, allowing direct drive of relays, LEDs, or other low-power actuators without external amplification. - **Adjustable Input Threshold:** Input channels 1–8 feature an adjustable threshold range of **±12 V**, providing flexibility for interfacing with various signal levels and noise environments. - **Interrupt Support:** Hardware interrupt capability on **IRQ lines 2–7**, enabling responsive event-driven control and efficient CPU utilization. - **Dual 50-Pin Connectors:** Two standard 50-pin headers provide convenient access to all I/O lines and counter/timer signals, simplifying cabling and integration. - **ISA Bus Interface:** Fully compatible with the **AT ISA bus**, ensuring reliable operation in legacy and industrial PC systems. - **Driver Support:** Compatible with **DOS and Windows** operating systems; includes driver software and programming libraries for easy integration into custom applications. - **Compact Form Factor:** Board dimensions of **190 mm × 99 mm**, suitable for standard ISA slots in industrial PCs and embedded controllers.

Manufacturer: Axiom

Category: Counter/Timer ISA

- **24 TTL Digital I/O Channels:** Provides 24 channels configurable as digital inputs or outputs, supporting standard TTL logic levels for compatibility with a wide range of digital devices and sensors. - **High Output Sink Current:** Each output channel supports up to **24 mA sink current**, enabling direct drive of LEDs, relays, and other low-power actuators without additional driver circuitry. - **Integrated 10 MHz Oscillator:** Onboard oscillator provides a stable clock source for timing, counting, and interrupt generation, ensuring precise synchronization and timing accuracy. - **Interrupt Generation Capability:** Supports hardware interrupt generation for event-driven applications, allowing the host system to respond immediately to external digital events. - **Three 16-bit Programmable Counters (82C54):** Incorporates an **Intel 82C54-compatible programmable interval timer/counter** with three independent 16-bit counters, each capable of operating from DC up to 10 MHz. - **Counter Chaining Support:** Counters can be cascaded (chained) for extended counting range or complex timing operations, providing flexibility for frequency measurement, pulse counting, or waveform generation. - **Breadboard Area for Custom Circuits:** Includes a dedicated prototyping area on the PCB, allowing users to integrate custom circuits, signal conditioning, or interface logic directly on the card. - **Dual Connector Interface:** Equipped with a **50-pin main connector** and an additional **20-pin auxiliary connector**, providing flexible connectivity options for external devices and expansion modules. - **Compact Form Factor:** PCB dimensions of **129 mm x 99 mm**, suitable for standard ISA slots in industrial PCs and legacy control systems. - **ISA Bus Interface:** Fully compatible with the standard PC ISA bus architecture, ensuring reliable communication and easy integration into existing systems.

Manufacturer: Axiom

Category: Counter/Timer ISA

- **24 TTL/DTL Compatible Digital I/O Lines:** Arranged into three 8-bit groups, each group can be independently configured as input or output, providing flexible digital interfacing options. - **High Output Drive Capability:** Each output line supports a **sink current of up to 24 mA**, allowing direct control of LEDs, relays, or other low-power devices. - **8255 Mode 0 Emulation:** The DIO section emulates the Intel 8255 Programmable Peripheral Interface (PPI) in Mode 0, ensuring compatibility with legacy software and hardware designs. - **Three Programmable Counter/Timer Channels:** Incorporates an **82C54** counter/timer chip with three independent 16-bit counters, supporting six programmable modes for event counting, frequency measurement, and pulse generation. - **Wide Frequency Range:** The counter/timer operates from **DC to 10 MHz**, suitable for both slow and high-speed timing applications. - **Onboard Oscillator:** Integrated **10 MHz oscillator** provides a stable timing source for the counters, with jumper-selectable frequency options (10 MHz, 1 MHz, or 100 kHz). - **Counter Chaining Capability:** Jumpers allow chaining of counters for extended counting range or complex timing operations. - **Interrupt Generation:** Supports multiple interrupt request lines (**IRQ2–15**) for event-driven applications, enabling efficient CPU utilization. - **Enhanced Noise Immunity:** Input hysteresis with typical thresholds (VT+ / VT– = 0.4 V) improves noise margins and signal stability in industrial environments. - **Breadboard Area:** Provides a small prototyping area for custom circuitry integration or signal conditioning. - **Dual I/O Connectors:** Equipped with a **50-pin male ribbon connector** and a **20-pin male ribbon connector** for flexible external wiring and accessory connection. - **Software Support:** Includes DOS and Windows® 3.1/95/98/2000/NT drivers, DLLs, and utilities for easy integration into software applications. - **Accessory Compatibility:** Fully compatible with Axiom’s signal conditioning and terminal boards such as AX754, AX755, AX756, and AX951A. - **Industrial-Grade Design:** Designed for reliable operation in industrial environments with wide humidity tolerance and robust electrical characteristics.

Manufacturer: Axiom

Category: Counter/Timer ISA

- **High-Density Digital I/O:** Provides a total of 72 digital channels, including 32 dedicated TTL inputs and 40 configurable TTL digital input/output lines. - **Integrated Counter/Timer Functions:** Equipped with two Zilog Z8536 counter/timer controllers, each offering three 16-bit counter/timer channels, for a total of six independent 16-bit counters/timers. - **Interrupt Support:** Supports interrupt requests (IRQ) on channels 2 through 7, allowing responsive event-driven control and efficient CPU utilization. - **TTL Logic Compatibility:** All digital channels operate at standard TTL voltage levels, ensuring compatibility with a wide range of sensors, actuators, and logic devices. - **Compact Design:** The 98 mm × 104 mm PCB size allows easy installation in space-constrained systems or embedded enclosures. - **Dual 50-Pin Connectors:** Two standard 50-pin headers provide organized and accessible connections for all digital I/O lines, simplifying wiring and integration. - **Flexible I/O Configuration:** The 40 DIO channels can be individually configured as input or output, enabling dynamic adaptation to various control tasks. - **Industrial Reliability:** Designed for stable operation in industrial environments, with robust electrical characteristics and durable PCB construction. - **Versatile Application Support:** Suitable for machine control, process monitoring, data acquisition, and laboratory automation systems.

Manufacturer: Axiom

Category: Counter/Timer ISA

- **High Channel Density:** 32 independent counting channels, each capable of 16-bit resolution, allowing simultaneous monitoring of multiple pulse or event sources. - **Integrated Toshiba CPU:** Built around the Toshiba TMPZ84C011BF-6 microprocessor, ensuring reliable onboard processing and intelligent control of counting operations. - **Programmable Timers:** Three 16-bit timers (Intel 82C54 compatible) provide flexible timing, gating, and event measurement functions. - **Opto-Isolated Inputs:** Each input channel is optically isolated to protect against electrical noise and voltage surges, supporting 12–24 VDC input levels. - **Edge-Selectable Triggering:** Configurable to count on either rising or falling edges, enabling compatibility with a wide range of sensors and encoders. - **Interrupt Support:** One interrupt request (IRQ) selectable from IRQ3–7, 9–12, 14, or 15, allowing flexible integration with host systems. - **Noise Immunity and Surge Protection:** Built-in Zener diode protection and opto-coupler isolation prevent damage from transient voltages and electrical disturbances. - **Compact Form Factor:** Board dimensions of 160 mm × 122 mm make it suitable for compact industrial PC enclosures. - **Industrial-Grade Design:** Designed for continuous operation in industrial environments, supporting up to 200 Hz input frequency. - **Comprehensive Software Support:** Compatible with CONTEC’s Windows and Linux drivers, API-TOOLs, and LabVIEW VI-DAQ libraries for easy integration into automation systems.

Manufacturer: Contec

Category: Counter/Timer ISA

- **Four Independent 24-bit Counters:** Each channel supports up/down counting with 24-bit resolution, suitable for high-precision pulse measurement. - **Dual Input Modes:** - **TTL-level input:** Supports up to 1 MHz pulse frequency (duty cycle 50%). - **Opto-isolated input:** Supports up to 500 kHz pulse frequency (duty cycle 50%), providing electrical isolation for noise immunity and protection against external disturbances. - **Two-Phase and Single-Phase Counting:** Capable of counting two-phase signals from incremental rotary encoders, linear gauges, or other pulse-output sensors. - **Programmable Timer:** Built-in timer adjustable from **1 ms to 200 s**, enabling periodic interrupt generation or time-based counting control. - **Interrupt Functionality:** Generates interrupts when a preset count value is reached or when the timer expires. Supports IRQ assignment to **IRQ3–7, 9–12, 14, or 15**. - **Digital Filter Function:** Hardware-based digital filtering prevents false counts caused by noise or contact chattering, ensuring stable and accurate operation. - **Counter Coincidence Output:** Provides an external output signal when the counter value matches a preset reference, useful for synchronization and control tasks. - **Opto-Isolation for Industrial Reliability:** Opto-coupler input circuits isolate the PC from external devices, protecting against voltage surges and ground potential differences. - **Compact ISA Form Factor:** Standard ISA-AT board dimensions (163 mm × 122 mm) suitable for industrial PCs and legacy control systems. - **Multi-Platform Software Support:** Compatible with **Windows** and **Linux** through CONTEC’s **API-PAC(W32)** driver suite. Also supports **LabVIEW** via the **VI-DAQ** library for graphical programming environments.

Manufacturer: Contec

Category: Counter/Timer ISA

- **Four Independent 32‑bit Counters:** Each channel supports up/down counting with two‑phase, single‑phase, or single‑phase + gate control modes. - **High‑Speed LVTTL Input:** Accepts pulse signals up to 10 MHz (duty 50 %). - **Two‑Phase Signal Support:** Capable of decoding quadrature encoder signals (A/B/Z phases). - **Bus‑Master Transfer:** Enables high‑speed DMA data transfer between the card and PC memory without CPU load. - **Programmable Timer:** 1 – 6553 ms (1 ms steps) for periodic interrupts or timing control. - **Digital Filter:** Hardware noise suppression with programmable delay (0.1 µs – 1.6384 ms). - **Interrupt Generation:** One interrupt line with multiple factors – count match, count error, sampling factors, carry/borrow, timer. - **Sampling Function:** Internal or external clock sampling up to 20 MHz (1 ch) using bus‑master DMA. - **Test Pulse Output:** Built‑in 100 kHz LVTTL test pulse for self‑diagnosis. - **Software Compatibility:** Bundled Windows API‑PAC(W32) driver library; supports C/C++, Visual Basic, Delphi, LabVIEW (VI‑DAQ). - **Optional Differential Input Conversion:** Differential/TTL input terminal (CTP‑4D) and CNT‑68M/50M cable enable differential signal operation. - **Compact CardBus Type II Form Factor:** Ideal for notebook or embedded systems requiring portable high‑speed counting. - **RoHS / Pb‑Free Compliant:** Environmentally safe design.

Manufacturer: Contec

Category: Counter/Timer ISA