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GE PMC-422 Communication Interface Card
GE PMC-422
The GE PMC-422 is a high-performance four-port asynchronous serial communication interface card that adopts the standard PCI Mezzanine Card (PMC) form factor. This product is part of the extensive VMIC product line under GE Fanuc Automation (now integrated into Emerson), and is specifically designed for industrial computing and embedded applications that require multi-serial port connections. Acting as a “communication hub” in the system, the GE PMC-422 provides four independent RS-232/422/485 serial ports for PCI architecture-based Single-Board Computers (SBCs), routers, or industrial computers, significantly expanding the device connectivity capability of the host. Its core value lies in delivering excellent data integrity, flexible protocol adaptability, and high reliability in harsh industrial environments. It can stably connect and support devices such as PLCs, drives, Human-Machine Interfaces (HMIs), barcode readers, sensors, and various customized serial devices, serving as a key bridge for device interconnection and data acquisition.
Product Specifications
- Product Model: PMC-422
- Manufacturer: General Electric (GE) / VMIC
- Product Type: PMC Serial Communication Interface Card
- Form Factor: PCI Mezzanine Card (PMC), compliant with the IEEE P1386.1 standard
- Number of Ports: 4 independent asynchronous serial ports
- Interface Standard: Each port can be software-selectable as RS-232, RS-422, or RS-485
- Data Rate: 0 to 921.6 kbps (software-programmable)
- Data Bits: 5, 6, 7, 8 (software-programmable)
- Stop Bits: 1, 1.5, 2 (software-programmable)
- Parity Check: None, Even, Odd, Space, Mark (software-programmable)
- Flow Control: Supports RTS/CTS, DTR/DSR, XON/XOFF
- FIFO Buffer: 128 bytes per port (used to improve throughput)
- Interrupt: Supports PCI interrupt
- Power Consumption: +5V @ 500 mA (typical value), +3.3V @ 10 mA
- Operating Temperature: 0°C to +55°C (suitable for industrial control environments)
Key Features and Advantages
Exceptional Connection Density and Flexibility
The most prominent advantage of the GE PMC-422 is that it provides four fully independent serial ports in a single PMC slot. Each port can be dynamically configured as RS-232, RS-422, or RS-485 mode through software, which offers unparalleled flexibility. This allows the same card to connect to devices with different interface standards simultaneously, greatly saving space and costs.
Outstanding Reliability and Data Integrity
This board is designed for industrial environments. Its component selection and circuit layout optimize the ability to resist Electromagnetic Interference (EMI). The 128-byte FIFO (First-In-First-Out) buffer per port ensures that no data is lost due to system delays even at high baud rates. The support for multiple hardware flow controls (RTS/CTS) further guarantees the reliability during large-volume data transmission.
Wide Compatibility and Easy Integration
Compliance with the standard PMC form factor enables it to be compatible with Single-Board Computers (SBCs) and carrier boards from GE, VMIC, or other suppliers that provide PMC sites. At the software level, it usually provides standard operating system drivers (such as Windows, Linux, VxWorks), making the integration process simple and fast. Developers can program it just like using the native serial ports of the operating system.
Application Fields
The GE PMC-422 is widely used in industrial computing and embedded fields that require connection to multiple serial devices. In factory automation, it is installed in industrial computers to communicate with multiple PLCs, CNC controllers, touch screens, and vision systems at the same time. In communication infrastructure, it is used in network routers and access devices to provide Out-of-Band Management ports. In transportation, energy monitoring, and military systems, it is applied for data logging, device control, and sensor data acquisition. Any application that needs to expand the multi-serial port capability for embedded systems is an ideal scenario for the PMC-422.
Installation and Maintenance
Pre-Installation Preparation
Before installing the GE PMC-422, the host power must be turned off and all power cables disconnected. Operators should wear anti-static wristbands. Confirm that the PMC site on the host board is available and compatible. Prepare the correct high-density serial cables and plan the purpose and protocol configuration of each port.
Maintenance Recommendations
The maintenance of this board mainly involves preventive measures. Ensure that the system cooling fans work properly to prevent dust accumulation on the board and connectors. In case of communication failures, first use software tools to check whether the port configurations (such as baud rate, data bits) are correct, and then use a loopback test header to check if the hardware itself is normal. Drivers should be kept up-to-date. When cleaning, use an anti-static brush and compressed air to remove dust.
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Xiamen Xingruijia Import and Export Co., Ltd. is a high-tech enterprise with years of professional experience in the sales of spare parts for large-scale imported systems, including Distributed Control Systems (DCS), Programmable Logic Controllers (PLC), Redundant Fault-Tolerant Control Systems, and Robot Systems.
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