Transmits up to eight independent supervised or unsupervised dry switch or relay contacts over one optical fiber, or via a 2-wire RS-485 point-to-point copper circuit
Indicating LEDs for monitoring power, contact closure status, and summary fault
Automatic resettable solid-state current limiters
Hot-swappable rack modules
Interchangeable between stand-alone or rack mount use - ComFit
The ComNet™ FDC80R485 contact closure transmitter and receiver units provide transmission of up to eight independent supervised or unsupervised dry switch or relay contact closures over a single optical fiber, or any two-wire RS-485 copper circuit. Microprocessor-based logic transmits the contact closure information in packets that are ordered and encoded, ensuring extremely robust and reliable transmission. Packets that are garbled, or packets out of sequence with transmission bit errors will not cause random changes of state in the FDC80R receiver unit relays. The supervising function in the FDC80T transmitter allows for the detection of short and open circuit conditions, and normally open or normally closed contact inputs are supported. System faults are displayed via LED status indicators, and user-programmable summary fault alarm contacts are triggered in the FDC80R receiver unit. The FDC80R receiver is offered in both latching and non-latching relay configurations. External series and shunt resistors are included for each of the 8 contact input channels, for contact supervision.
ComNet FDC80R485 Key Features
Transmits: Up to eight independent supervised or unsupervised dry switch or relay contacts over one optical fiber or 2-wire RS-485 copper circuit, ensuring versatile application environments.
Microprocessor-Based Logic: Prevents random contact closure states during communication loss, enhancing reliability and system stability.
Certification: Independently tested for compliance with NEMA TS-1/TS-2 and Caltrans specifications, guaranteeing environmental resilience and durability.
LED Indicators: Provides real-time monitoring of power, contact closure status, and faults, simplifying system management and maintenance.
Current Limiters: Automatic resettable solid-state current limiters protect the system from overloads, ensuring continuous operation.
Hot-Swappable Modules: Supports easy maintenance and upgrades without disrupting system operation, minimizing downtime.
Versatile Mounting: Can be used stand-alone or rack-mounted with the ComFit system, offering flexibility in installation.
ComNet FDC80R485 Detailed Specifications
Transmission Medium
Single optical fiber or 2-wire RS-485 copper circuit
FDC80R485-Specsheet
Tools & Calculators