- **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

- **48 Programmable Digital I/O Lines:** Configurable as input or output in two groups of 24 channels each. - **8255 Mode 0 Compatibility:** Emulates two Intel 8255 PPIs for flexible I/O configuration. - **High Output Drive Capability:** Up to 24 mA sink and 15 mA source per channel. - **Low Input Loading:** 0.2 mA at 0.4 V ensures minimal signal distortion. - **Integrated Event Counter:** One 16‑bit programmable counter for event counting up to 2 MHz. - **Programmable Timer Pacer:** One 32‑bit timer (two cascaded 16‑bit counters) with selectable 32.768 kHz or 2 MHz clock sources. - **Interrupt Support:** Selectable IRQ3–IRQ15 (9 levels) for event, timer, or input‑triggered interrupts. - **Opto‑22 Connector Compatibility:** Two 50‑pin connectors (CN1, CN2) with standard Opto‑22 pinout for easy integration with industrial I/O modules. - **Compact ISA Form Factor:** Occupies only two consecutive I/O addresses, allowing multiple cards per system. - **TTL Logic Compatibility:** All I/O lines are TTL‑level compatible using 74LS244 buffer/driver circuits. - **Software Support:** Includes DOS and Windows drivers, C/C++ libraries, and LabVIEW driver (ACLS‑LVIEW). - **Flexible Jumper Configuration:** Adjustable base address, pull‑up/pull‑down resistors, interrupt levels, and clock sources.

Manufacturer: Adlink Technology Inc.

Category: Counter/Timer ISA

- **Multi-Function Counter/Timer/Pulse Generator:** Provides 10 independent channels of 16-bit counting and timing functionality, enabling simultaneous measurement and control of multiple signals. - **Dual AM9513A Timing Devices:** Equipped with two AMD AM9513A programmable timer/counter chips, offering flexible configuration for frequency measurement, event counting, pulse width modulation, and time interval generation. - **High-Speed Operation:** Supports maximum input frequency up to **7 MHz**, ensuring accurate counting and timing for high-speed digital signals. - **Interrupt Support:** One programmable interrupt request (IRQ) selectable from **IRQ 3–7, 9–12, 14, or 15**, allowing flexible integration with PC interrupt architecture. - **Digital I/O Capability:** Includes **16 TTL-level inputs** and **16 TTL-level outputs**, enabling direct interface with external logic-level devices for control and monitoring. - **Compact Form Factor:** Board dimensions of **160 mm × 122 mm**, suitable for standard PC expansion slots. - **Connector Interface:** Two **37-pin D-sub female connectors** provide robust and standardized external connectivity for signal I/O. - **High Precision and Stability:** 16-bit resolution counters ensure fine granularity in timing and counting operations, suitable for precision measurement and control. - **Industrial Reliability:** Designed for continuous operation in industrial environments, with robust electrical design and high noise immunity.

Manufacturer: Contec

Category: Counter/Timer ISA