1. Product Overview

Product Name: TTL Bi-Directional DIO 144 Channel Card
Model: PIO-144W(PC)
Series: PIO Series – Digital I/O Interface Boards
Article Number: PIO-144W(PC)
Manufacturer: CONTEC Co., Ltd. (Japan)
Product Category: Industrial Automation / Measurement and Control – Digital I/O Interface Boards

The CONTEC PIO-144W(PC) is a high-density, TTL-level, bi-directional digital input/output interface card designed for industrial and laboratory automation systems. It provides 144 channels of digital I/O on a single board, offering flexible configuration, high-speed response, and compatibility with standard PC bus architectures. The card is part of CONTEC’s extensive PIO series, which includes a wide range of digital I/O solutions for PCI, ISA, CompactPCI, USB, and PC Card interfaces.

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2. Key Features

- High-Density I/O: Provides 144 channels of TTL-level bi-directional digital input/output, enabling large-scale signal interfacing within a single expansion slot.
- Bus Compatibility: Designed for PC bus systems, compliant with standard PC/AT architecture.
- Interrupt Support: Supports up to six interrupt request lines (IRQ 3–7, 9), allowing flexible event-driven control.
- Connector Configuration: Equipped with six 50-pin connectors for external signal interfacing, supporting a wide range of cable and terminal block accessories.
- Compact Form Factor: Board dimensions of 160 mm × 122 mm, suitable for standard PC chassis installation.
- High-Speed TTL Logic: Operates at 5V TTL logic levels, providing fast response and compatibility with standard digital logic circuits.
- Bi-Directional Channels: Each channel can be configured as input or output under software control, allowing dynamic reconfiguration.
- Software Support: Compatible with CONTEC’s API-TOOL driver suite for Windows and Linux, and VI-DAQ library for LabVIEW integration.
- Industrial Reliability: Designed for continuous operation in industrial environments, with robust PCB design and stable signal characteristics.
- Flexible Expansion: Can be combined with other CONTEC digital I/O boards for expanded channel count or mixed signal configurations.

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3. Technical Specifications

| Parameter | Specification |
|----------------|------------------|
| Model | PIO-144W(PC) |
| Bus Interface | PC/AT compatible bus |
| I/O Channels | 144 bi-directional TTL-level channels |
| Signal Type | TTL (5VDC, positive logic) |
| Interrupts | 6 interrupt request lines (IRQ 3–7, 9) |
| Connectors | 6 × 50-pin headers (mini-ribbon type) |
| Dimensions | 160 mm (L) × 122 mm (H) |
| Power Supply | +5VDC supplied from PC bus |
| Power Consumption | Approx. 200–400 mA (typical) |
| Input Voltage Range | TTL level (0–5VDC) |
| Output Drive Capability | TTL output, sink/source current ±15 mA typical |
| Response Time | < 200 nsec (typical) |
| Wiring Distance | Up to 1.5 m (recommended) |
| Operating Temperature | 0°C to +50°C |
| Storage Temperature | -10°C to +60°C |
| Humidity | 10–90% RH (non-condensing) |
| Weight | Approx. 150 g |
| Mounting | Internal PC expansion slot |
| Insulation | Non-isolated (direct TTL interface) |

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4. Functionality

The PIO-144W(PC) functions as a high-speed, non-isolated digital I/O interface board for PC-based control systems. Each of the 144 channels can be individually configured as input or output, allowing flexible adaptation to various control and monitoring tasks. The board communicates with the host system through the PC bus, enabling direct memory-mapped or port-based I/O operations.

Typical Use Cases:
- Industrial automation and process control systems
- Data acquisition and monitoring applications
- Production line control and inspection systems
- Laboratory instrumentation and test automation
- Embedded control systems requiring large digital I/O capacity

Compatibility:
- Compatible with standard PC/AT bus systems
- Supported by CONTEC’s API-TOOL driver suite for Windows and Linux
- Integrates with LabVIEW via VI-DAQ library
- Works with CONTEC’s accessory cables and terminal blocks (e.g., PCB50PS, PCA50PS, EPD-50A)

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5. Components & Accessories

Included Components:
- PIO-144W(PC) main board
- User manual and setup guide
- Driver software (API-TOOL for Windows/Linux)

Optional Accessories:
- Cables:
- PCB50PS / PCA50PS (50-pin flat cable, 0.5 m or 1.5 m)
- PCE50/37PS-0.5P (conversion cable from 50-pin to 37-pin D-SUB)
- Terminal Blocks:
- EPD-50A, EPD-37A, EPD-96 (for easy wiring and signal distribution)
- Connector Sets:
- CN5-D37M, CN5-H96F (for custom cable fabrication)
- Mounting Accessories:
- Standard PCI/ISA slot bracket
- Optional low-profile bracket (if required for compact systems)

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6. Installation & Setup

Requirements:
- IBM PC/AT compatible computer with available ISA or PC bus slot
- +5VDC power supply from the system bus
- Operating system: Windows (API-TOOL supported versions) or Linux

Installation Steps:
1. Power off the host PC and remove the cover.
2. Insert the PIO-144W(PC) card into an available PC bus slot.
3. Secure the card using the bracket screw.
4. Connect external devices using the 50-pin connectors and appropriate cables.
5. Power on the PC and install the driver software.
6. Configure I/O addresses and interrupt settings using the provided utility or API functions.

Configuration:
- I/O address can be assigned at any 32-byte boundary.
- Interrupt lines (IRQ 3–7, 9) can be selected via software or jumper settings.
- Each channel can be configured as input or output dynamically.

Mounting Options:
- Standard internal mounting in PC chassis
- Optional external breakout via terminal blocks for field wiring

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7. Performance & Capabilities

- Speed: High-speed TTL-level operation with response times under 200 nanoseconds, suitable for real-time control and high-frequency signal acquisition.
- Capacity: 144 channels provide extensive digital interfacing capability, reducing the need for multiple boards.
- Efficiency: Direct bus communication minimizes CPU overhead and latency.
- Interrupt Handling: Six independent interrupt lines allow event-driven control for multiple signal groups.
- Limitations:
- Non-isolated design; external circuits must share common ground with the PC.
- Limited to TTL-level signals (0–5VDC); not suitable for high-voltage or industrial 24VDC systems without external isolation modules.
- Wiring distance limited to approximately 1.5 meters due to TTL signal integrity constraints.

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8. Standards & Compliance

- Bus Standard: PC/AT compatible bus interface
- Signal Standard: TTL (Transistor-Transistor Logic)
- Electrical Compliance: 5VDC logic level, conforms to standard TTL input/output specifications
- Software Standards:
- Windows API-TOOL (Win32 API compatible DLLs)
- Linux API-TOOL (shared library and kernel module)
- LabVIEW VI-DAQ (compatible with National Instruments’ DAQ VI format)
- Regulatory Compliance:
- CE marking (for electromagnetic compatibility and safety)
- RoHS compliant (lead-free manufacturing)
- Industry Standards:
- Compatible with CONTEC’s digital I/O ecosystem (PIO, PI, PO, DI, DO series)
- Connector pin assignments follow CONTEC’s standard 50-pin layout for digital I/O boards

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9. Additional Information

Warranty:
- Standard manufacturer’s warranty (typically one year) covering defects in materials and workmanship.

Support:
- Technical support available via CONTEC’s global portal (www.contec.com).
- Online documentation, driver downloads, and software updates provided free of charge.

Maintenance:
- Periodic inspection of connectors and cables recommended.
- Ensure proper grounding and avoid exposure to static discharge.
- Clean board contacts with appropriate electronic contact cleaner if necessary.

Software Updates:
- API-TOOL drivers for Windows and Linux are license-free and regularly updated.
- VI-DAQ library for LabVIEW available for free download, ensuring compatibility with latest LabVIEW versions.

Developer Resources:
- API-TOOL provides a comprehensive set of functions for digital I/O control, including read/write operations, interrupt handling, and configuration management.
- Sample code and documentation included for C/C++, Visual Basic, and LabVIEW environments.

Integration Notes:
- The PIO-144W(PC) can be combined with other CONTEC boards (analog I/O, counters, communication interfaces) for complete automation solutions.
- Compatible with CONTEC’s distributed monitoring and control network (F&eIT) for remote I/O expansion.

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Summary

The CONTEC PIO-144W(PC) is a robust, high-channel-count TTL digital I/O card engineered for industrial and laboratory automation systems requiring extensive digital interfacing. With 144 bi-directional channels, six interrupt lines, and six 50-pin connectors, it provides exceptional flexibility and scalability. Its TTL-level, non-isolated design ensures high-speed operation and direct compatibility with standard logic circuits, while CONTEC’s comprehensive software support (Windows, Linux, LabVIEW) simplifies integration into diverse control environments. Compact, reliable, and fully supported by a wide range of accessories, the PIO-144W(PC) is an ideal solution for engineers and system integrators seeking a high-performance digital I/O interface for PC-based control systems.