Eaton PXIO-B
The PXIO‑B is a modular I/O expansion board belonging to the Eaton Power Xpert (PX) series, specifically engineered for the PX4000 rack-mount control system. With a compact 1U form factor for rack installation, it enables rapid expansion of digital, analog, and discrete I/O within the same rack, meeting the demands for high-reliability and low-latency I/O in industrial field environments.
Key Technical Specifications
- Dimensions: 1 U (approximately 44 mm in height), compatible with standard 19‑inch racks
- Power Supply: Unified power supply from the PX4000 system power supply (PXPS‑4), operating voltage at 24 V DC
- I/O Types: Offers digital input/output, analog input/output (0‑10 V, 4‑20 mA), and optional discrete relay channels
- Maximum Channel Count: Up to 32–64 channels (digital/analog combination) depending on the specific model
- Response Time: ≤ 1 ms for digital signals, ≤ 5 ms for analog signals
- Operating Temperature: -20 °C to +60 °C, compliant with industrial field environment requirements
- Compliance Standards: UL 508, CE, RoHS
Product Features
- Modular Plug-and-Play: Enables I/O expansion by directly inserting into the PX4000 rack without on-site wiring, significantly reducing installation time.
- High Reliability: Adopts an industrial-grade high-strength alloy or stainless steel housing, resistant to shock and vibration, and compliant with the UL 508 safety standard.
- Low Power Consumption & Low Leakage: The internal circuit features a low-power design, making it ideal for energy-sensitive automation systems.
- Electromagnetic Interference (EMI) Resistance: Optimized board layout and filtering design effectively suppress EMI, ensuring stable operation in complex electromagnetic environments.
- Diagnostic Capabilities: Supports online self-testing and channel status monitoring, facilitating quick fault location and maintenance.
Structure and Components
- I/O Module Main Body: Includes terminal blocks for digital/analog input and output, relay output banks, and corresponding signal processing chips.
- Backplane Connector: Serves as a high-speed bus interface with the PX4000 host backplane, enabling unified transmission of data, power, and clock signals.
- Heat Sink: A metal heat sink attached to the back of the board ensures effective thermal management during long-term operation.
- Protective Cover: An optional dustproof and waterproof cover is available for use in harsh industrial sites.
Typical Application Areas
- Process Automation: Sensor signal acquisition and actuator control in continuous production processes such as chemical, petroleum, and natural gas industries.
- Machine Vision & Robotics: High-speed digital I/O for camera triggering, robot safety light curtains, etc.
- Building & Energy Management: I/O interface for building automation, power distribution monitoring, and renewable energy inverters.
- Packaging & Printing: High-speed discrete I/O for synchronous control of packaging lines and printing presses.
Installation and Maintenance Guidelines
- Rack Space Reservation: Reserve a 1 U slot in the PX4000 rack and ensure sufficient heat dissipation channels at the rear.
- Power Supply Inspection: Verify that the PXPS‑4 power supply is operating normally and the voltage complies with the 24 V DC specification.
- Wiring Standards: Wire according to the terminal block markings in the product manual. Shielded cables are recommended for digital inputs to reduce noise interference.
- Firmware Upgrade: The PXIO‑B firmware can be upgraded via Eaton configuration software (e.g., Configurator) to enhance compatibility and functionality.
- Regular Self-Testing: Utilize the system’s built-in diagnostic functions to perform a monthly I/O channel self-test, promptly detecting loose or faulty terminals.
- Replacement and Upgrade: To change the channel type (e.g., from digital to analog), simply remove the old module and insert a PXIO‑B replacement module of the corresponding specification; the system will automatically recognize it and update the configuration.

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Main Products, Advantageous Supply & Sufficient Inventory
- Invensys Foxboro: I/A Series systems, FBM (Field Input/Output Modules) for sequence control, ladder logic control, accident recall processing, analog-to-digital conversion, input/output signal processing, data communication and processing, etc.
- Invensys Triconex: Redundant fault-tolerant control systems, state-of-the-art fault-tolerant controllers based on Triple Modular Redundancy (TMR) architecture.
- Westinghouse: Spare parts for OVATION systems, WDPF systems, and WEStation systems.
- Rockwell Allen-Bradley: Reliance product line, SLC500/1747/1746, MicroLogix/1761/1763/1762/1766/1764, CompactLogix/1769/1768, Logix5000/1756/1789/1794/1760/1788, PLC-5/1771/1785, etc.
- Schneider Modicon: Quantum 140 series processors, control cards, power supply modules, etc.
- ABB: Industrial robot spare parts including DSQC series, Bailey INFI 90 system components, etc.
- Siemens: Siemens MOORE, Siemens Simatic C1, Siemens CNC systems, etc.
- Motorola: MVME 162, MVME 167, MVME 1772, MVME 177 and other series.
- XYCOM: I/O modules, VME boards, processors, etc.
- GE FANUC: Various spare parts such as modules, cards, and drives.
- Yaskawa: Servo controllers, servo motors, servo drives.
- Bosch Rexroth: Indramat product line, I/O modules, PLC controllers, drive modules, etc.
- Woodward: SPC valve position controllers, PEAK150 digital controllers.
Industrial Robot System Spare Parts
Advantage Brands
ABB Robots, FANUC Robots, YASKAWA Robots, KUKA Robots, Mitsubishi Robots, OTC Robots, Panasonic Robots, MOTOMAN Robots, etc.
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