8 Channel Contact Mapping

FDC8 Series

Example of 8 Channel Contact Mapping

Availability: Worldwide

PDF Datasheet: en  
DOC A&E Specs




-40 º to +75 ºC




Made in the USA



The ComNet FDC8 Series contact closure transmitter and receiver provides transmission of up to eight independent contact closures over one RS232 link or optical fiber. Microprocessor-based logic sends the contact information in packets that are ordered and encoded, ensuring extremely robust transmission. Packets that are garbled, packets out of sequence, and transmission bit errors will not cause random changes of state on the contact relays. Also, the mechanical latching relays maintain their state even when the unit loses power. Each module incorporates power and individual status indicating LEDs for monitoring confirmation of contact closure of each of the eight channels. These units are interchangeable between stand-alone or card mount configurations.

Features for FDC8 Series

  • Point-to-Point architecture
  • Designed to meet full compliance with the environmental requirements (ambient operating temperature, mechanical shock, vibration, humidity with condensation, high-line/low-line voltage conditions, and transient voltage protection) of NEMA TS-1/TS-2 and the Caltrans Specification for Traffic Signal Control Equipment.
  • SPST latching relays
  • Microprocessor-based logic and latching relays in receiver unit eliminate random contact closure status in the event of loss of link or loss of prime operating power.


  • Alarm Event Triggering
  • Building Automation and Environmental Control Systems
  • Fire and Alarm Systems
  • Gate Control
  • PIR Signal Transmission

FDC8 Series Application Diagram(s) (1)

Application Diagram(s) for FDC8 Series

FDC8 Series Ordering Information

Part NumberDescription
FDC8TM18-Channel Contact Closure Transmitter. Lifetime Warranty.
FDC8TS18-Channel Contact Closure Transmitter. Lifetime Warranty.
FDC8RM18-Channel Contact Closure Receiver. Lifetime Warranty.
FDC8RS18-Channel Contact Closure Receiver. Lifetime Warranty.