Comprehensive Product Summary – CONTEC DI‑128L‑PE PCI Express Isolated 128‑Channel Digital Input Card

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### 1. Product Overview
Product Name: Opto‑Isolated Digital Input Board
Model: DI‑128L‑PE
Series: PCI Express Digital I/O Series (L‑PE family)
Article Number: DI‑128L‑PE
Manufacturer: CONTEC Co., Ltd. (Japan)
Product Category: Industrial Automation / Measurement and Control – Digital Input Interface Boards
Product Description:
The CONTEC DI‑128L‑PE is a high‑density, opto‑isolated digital input interface card designed for PCI Express bus systems. It provides 128 optically isolated input channels for 12 – 24 V DC negative‑logic signals, with 16 inputs per common line. The board is engineered for industrial automation, machine control, and data acquisition applications requiring reliable isolation, noise immunity, and high‑speed digital input performance.

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### 2. Key Features
- 128 Opto‑Isolated Inputs: Provides 128 independent digital input channels, grouped with one positive common per 16 inputs.
- Optical Isolation: Each input channel is isolated from the PC’s internal logic circuits via high‑speed opto‑couplers, protecting the host system from electrical noise, surges, and ground potential differences.
- Input Voltage Range: Accepts 12 – 24 V DC (±10 %) negative‑logic signals, suitable for industrial sensors and control devices.
- Interrupt Capability: Up to 16 input signals can be configured as interrupt sources; these are combined into a single interrupt request (IRQ) line, INTA#, for efficient event handling.
- Digital Filtering Function: Built‑in digital filter suppresses noise and contact chattering, ensuring stable signal detection in electrically noisy environments.
- High‑Speed Response: Typical response time of 200 µs, enabling fast signal acquisition for automation and monitoring systems.
- PCI Express Interface: Compliant with PCI Express Base Specification Rev. 1.0a ×1; compatible with standard PCI Express slots on industrial PCs and workstations.
- Low‑Profile Form Factor: Board dimensions 169.33 mm (L) × 110.18 mm (H); includes both standard and low‑profile brackets for flexible installation.
- Software Support:
- Windows: API‑TOOL / API‑PAC(W32) driver library (Win32 DLL) for development and runtime use.
- Linux: Open‑source module‑style device driver and shared library.
- LabVIEW: VI‑DAQ library for National Instruments LabVIEW, providing easy integration with data acquisition VIs.
- Compatibility: Connector pin assignments and functional layout are fully compatible with the PCI‑bus model PI‑128L(PCI)H, simplifying migration from legacy PCI systems.
- RoHS Compliance: Environmentally friendly, lead‑free construction meeting EU RoHS directives.

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### 3. Technical Specifications
| Parameter | Specification |
|----------------|------------------|
| Input Channels | 128 channels (1 common / 16 channels) |
| Input Type | Opto‑isolated (for sink current output, negative logic) |
| Input Voltage Range | 12 – 24 V DC (±10 %) |
| Input Resistance | 4.7 kΩ (typical) |
| Input Current | Approx. 2.5 – 5 mA per channel (depending on voltage) |
| Response Time (Max.) | 200 µs |
| Interrupts | 16 input signals combined to one interrupt request (INTA#) |
| Isolation Method | Opto‑coupler isolation between I/O and logic circuits |
| Internal Power Supply | 3.3 V DC 600 mA (from PCI Express bus) |
| Wiring Distance | Up to 50 m (depending on wiring environment and cable type) |
| I/O Address Allocation | Any 32‑byte boundary |
| Bus Interface | PCI Express Base Specification Rev. 1.0a ×1 lane |
| Board Dimensions | 169.33 mm (L) × 110.18 mm (H) |
| Weight | Approx. 150 g (board only) |
| Operating Temperature | 0 – 50 °C (typical industrial environment) |
| Storage Temperature | –10 – 60 °C |
| Humidity | 10 – 90 % RH (non‑condensing) |
| Connectors | Two × 100‑pin 0.8 mm‑pitch female half‑pitch (HDRA E100W1LFDT1EC‑SL+ [HONDA Tsushin Kogyo] or equivalent) |
| Mounting Bracket | Standard and Low‑Profile PCI Express brackets included |
| Power Consumption | 3.3 V DC 600 mA (max) |
| Isolation Voltage | 500 V DC (minimum between I/O and logic circuits) |
| Compliance | RoHS Directive, CE mark (conformance to EMC standards) |

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### 4. Functionality
The DI‑128L‑PE functions as a high‑density digital input interface for industrial control systems. Each input channel detects the ON/OFF state of external DC signals (12–24 V DC) and transfers the logic state to the host computer via the PCI Express bus.
- Operation Principle:
External DC input signals drive opto‑couplers that convert electrical states into isolated logic levels. Negative‑logic configuration means an input is recognized as ON when the voltage is LOW (0 V) relative to the common line.
- Interrupt Handling:
Selected input channels can generate interrupts for event‑driven processing (e.g., sensor triggers, limit switches). Sixteen interrupt sources are logically OR‑combined into one INTA# signal to the host.
- Digital Filtering:
The board’s digital filter rejects transient pulses shorter than the configured threshold, preventing false triggering from noise or contact bounce.
- Applications:
- Factory automation and process monitoring
- PLC and sensor signal acquisition
- Machine tool and robot status monitoring
- Safety interlock and alarm input collection
- Data logging and test system input expansion
- Compatibility:
Fully compatible with CONTEC’s PCI‑bus PI‑128L(PCI)H board in terms of connector pinout and software interface, allowing direct replacement in upgraded PCI Express systems.

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### 5. Components & Accessories
Included Items
- DI‑128L‑PE board (main unit)
- Standard PCI Express bracket (mounted)
- Low‑profile bracket (accessory)
- Setup Guide / User Manual (downloadable)
- Driver software (API‑PAC(W32), Linux driver, LabVIEW VI‑DAQ library)

Optional Cables and Accessories
- Cables:
- PCB100PS (100‑pin cable)
- PCB100/96PS (100‑to‑96‑pin conversion cable)
- PCB100WS (100‑pin wiring set)
- PCA100P (100‑pin cable assembly)
- Terminal Blocks / Adapters:
- EPD‑100A, EPD‑96A, EPD‑96, EPD‑37A, EPD‑37 series terminal boards
- DTP‑3A / DTP‑4A screw‑terminal panels
- CM‑64(PC)E / CCB‑96 connector boxes
- Connector Specifications:
Two × 100‑pin female half‑pitch (0.8 mm) HDRA E100W1LFDT1EC‑SL+ connectors [HONDA Tsushin Kogyo or equivalent].
- Cable Length Options: 0.5 m / 1.5 m standard lengths.

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### 6. Installation & Setup
System Requirements
- Host PC with available PCI Express ×1 slot (compatible with ×4, ×8, ×16 slots).
- Operating System: Windows 10/11 (32/64‑bit), Linux kernel 2.6 or later.
- Administrative privileges for driver installation.

Installation Procedure
1. Power off the PC and disconnect AC power.
2. Insert the DI‑128L‑PE into an available PCI Express slot and secure the bracket.
3. Connect external wiring to the 100‑pin connectors using CONTEC cables and terminal blocks.
4. Power on the PC and install the appropriate driver (API‑PAC(W32) for Windows or Linux module).
5. Verify device recognition via Device Manager or `lspci`.
6. Configure I/O addresses and interrupt settings using the provided utility or API functions.

Mounting Options
- Standard PCI Express bracket for desktop industrial PCs.
- Low‑profile bracket for compact chassis (2U or smaller).

Configuration
- Input logic type is fixed (negative logic).
- Interrupt enable/disable and filter parameters set via software API.
- Multiple boards can be installed simultaneously; each occupies a unique I/O address block (32 bytes).

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### 7. Performance & Capabilities
- Input Capacity: 128 channels (16 groups × 8 channels per connector segment).
- Response Speed: ≤ 200 µs (maximum).
- Isolation Protection: Opto‑coupler isolation prevents ground loops and electrical interference.
- Noise Immunity: Digital filter and optical isolation ensure stable operation in industrial environments.
- Interrupt Processing: Hardware combines 16 interrupt sources into one INTA# signal to reduce CPU load.
- Power Efficiency: Consumes only 3.3 V × 0.6 A (≈ 2 W), minimizing system power draw.
- Scalability: Multiple boards can be installed for up to 512 inputs per system (depending on PC resources).
- Limitations: Input only (no output channels); requires external 12–24 V DC signal sources; not suitable for AC inputs.

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### 8. Standards & Compliance
- Bus Standard: PCI Express Base Specification Rev. 1.0a ×1.
- Electrical Safety: Opto‑isolation between I/O and logic circuits for operator and equipment protection.
- Environmental Compliance: RoHS Directive (lead‑free, hazardous substance restriction).
- EMC Compliance: Designed to meet CE mark requirements for industrial EMC standards (EN 55011 Class A, EN 61000‑6‑2).
- Quality Assurance: Manufactured under ISO 9001 certified processes.
- Connector Standards: 0.8 mm half‑pitch HDRA series connectors per HONDA Tsushin Kogyo specifications.
- Software Standards: API‑PAC(W32) and API‑TOOL libraries comply with Win32 API conventions; Linux drivers conform to GPL open‑source standards.

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### 9. Additional Information
Warranty & Support
- Standard manufacturer’s warranty: 1 year from date of purchase (covering defects in materials and workmanship).
- Technical support available via CONTEC global portal ([www.contec.com](http://www.contec.com)) including driver updates, sample code, and FAQs.
- Extended maintenance and calibration services available through authorized distributors.

Maintenance
- Periodically inspect connectors and cables for damage or loose connections.
- Avoid exposure to excessive dust, moisture, or vibration.
- Clean board surfaces with dry compressed air only; do not use solvents.

Software Updates
- Latest drivers and utilities available for download from CONTEC’s support site.
- API‑PAC(W32) and Linux drivers are license‑free for development and runtime use.
- VI‑DAQ for LabVIEW can be downloaded to enable graphical programming integration.

Related Products
- DI‑32L‑PE: 32‑channel PCI Express isolated input board.
- DI‑64L‑PE: 64‑channel PCI Express isolated input board.
- DO‑128L‑PE: 128‑channel isolated digital output board (35 V DC 100 mA per channel).
- DIO‑6464L‑PE: 64 input / 64 output combined I/O board.
All share the same software driver and connector pin assignments for system compatibility.

Ordering Information
| Model | Description |
|------------|----------------|
| DI‑128L‑PE | PCI Express 128‑channel opto‑isolated digital input card |
| PCB100PS | 100‑pin connection cable (0.5 m / 1.5 m) |
| PCB100/96PS | 100‑to‑96‑pin conversion cable |
| PCB100WS | 100‑pin wiring set |
| EPD‑100A / EPD‑96A | Terminal boards for signal termination |
| CM‑64(PC)E / CCB‑96 | Connector boxes for field wiring |

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### Summary
The CONTEC DI‑128L‑PE is a robust, high‑density digital input solution for industrial and laboratory automation systems requiring large‑scale, noise‑immune signal acquisition. Its 128 opto‑isolated inputs, PCI Express ×1 interface, and comprehensive software support make it ideal for upgrading legacy PCI‑based systems to modern platforms without redesigning existing wiring or software. With a 12–24 V DC input range, 200 µs response, and 16 interrupt‑capable channels, the DI‑128L‑PE delivers reliable, high‑speed performance in demanding environments while maintaining full compliance with industrial standards and environmental regulations.