The WinSystems PCM-COM4A-16-2 is a four-channel serial I/O module built on the PC/104 form factor for industrial embedded systems. It provides four independent asynchronous RS-232 channels via two 20-pin connectors, each capable of software-programmable baud rates to 115,200 bps. The module uses an 8250A-compatible UART (16C554 based) with 16-byte Tx and Rx FIFOs per channel, delivering register-compatible operation with legacy software including Greenleaf Comm Library and CROSSTALK.
Technical Specifications
• Form Factor: PC/104 module with 16-bit stackthrough I/O-mapped interface
• Serial Channels: 4 independent asynchronous channels
• UART: 8250A compatible, based on 16C554
• FIFO Depth: 16-byte transmit and receive per channel
• Baud Rates: Software programmable, up to 115,200 bps
• Data Formats: 5, 6, 7, or 8-bit characters; even, odd, or no parity; 1, 1.5, or 2 stop bits
• Control Signals: CTS, RTS, DSR, DTR, RI, DCD support
• Serial Interface: RS-232 standard; optional RS-422 and RS-485 electrical levels
• Interrupt Support: IRQ channels 2, 3, 4, 5, 6, 7, 10, 11, 12, 14, 15; shared interrupt capability with Status ID Register
• Diagnostics: Loopback and echo modes
• Dimensions: 3.6″ × 3.8″ (90 mm × 96 mm)
• Construction: 4-layer FR4 epoxy glass
• Operating Temperature: -40°C to +85°C
• Humidity: 5% to 95% non-condensing
– Key Features
• Four channels share a single interrupt line or route to independent IRQ channels
• Status ID Register enables rapid identification of active channels
• Dual 20-pin 0.100″ connectors for serial connections
• PC/104 connectors: 64-pin and 40-pin, 0.100″ grid
– Typical Applications
Modem communication, data collection equipment integration, and distributed I/O terminal connectivity in industrial temperature environments.
– Compatibility & Integration
Supports DOS, Windows NT/2000/XP, and Linux 2.2/2.6 kernels with available drivers and setup guides. 16-bit PC/104 standard with support for 8-bit data transfers. Power requirement: +5V DC ±5% @ 80 mA.
