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PC/104 Quad Serial Port

Operating Temperature -40° to +85°C

CM316 Quad Serial Port Module
Rugged IDAN configuration available


  • PC/104 stackable bus structure
  • Compatibility with the Industry Standard 16C550
  • 115.2K baud RS-232 operation
  • Up to 1.5M baud RS-422 operation
  • 16 byte transmit FIFO/16byte receive FIFO with error flags
  • Independent transmit and receive control
  • Standard modem interface
  • Jumper selectable to interrupt line, base address, RS232/RS422-485 mode per port
  • Jumper selectable enable/disable per port
  • Includes 42 different selectable I/O base addresses
  • Internal Common Registers added to configure and control the board operation
  • Low power-consumption


  • Four jumper-configurable RS-232/422/485 serial ports
    • 16550 compatible UARTs for high-speed
    • Termination resistors for RS-422/485


  • DOS diagnostic programs

Recommended Accessories

Physical Attributes

  • Dimensions
    • Length (L): 3.775 inches (95.89 mm)
    • Width (W): 3.550 inches (90.17 mm)
    • Stand-off Height: 0.600 inches (15.24 mm)
  • Weight: Approximately 0.22 lbs. (0.10 Kg)
  • Standard Operating Temperature, 90% humidity non-condensing: -40 to +85°C
  • Storage Temperature: -55 to +125°C
  • MTBF: 1,812,347 hours
  • Power Consumption: 1.5 W at 5 V

Documentation and Downloads

Ordering Information

Part Number Description Value


  PC/104 Quad Serial Port Peripheral Module



RTD Embedded Technologies, Inc.
Designed and Made in the USA
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