Comnet FDC10S1A Contact Closure Transceiver

Overview

The FDC10S1A is a small-format bi-directional contact closure transceiver designed to transmit discrete relay signals over single-mode fiber up to 69 km — solving the distance and noise-immunity problem when you need to trigger remote devices (door locks, gate controls, alarm relays) from a central security hub without running shielded copper pairs across your campus or between buildings. This industrial-grade unit handles 2 contact closures per direction over a single fiber strand, making it cost-effective for surveillance sites where fiber backbone already exists.

Compatibility

The FDC10S1A pairs with any security control system or NVR equipped with relay outputs and inputs (dry contact triggers). Common integration points include access control panels, video management systems with event relay ports, alarm hubs, and intercom systems that support contact closure signaling. The ST optical connector and terminal-block signal connectors ensure compatibility with standard fiber infrastructure and industrial control wiring. Pairs well with surveillance fiber runs where video traffic already justifies the fiber backbone — eliminates redundant cabling.

Installation Notes

Operates on 8–15 VDC input (typical 12V PSU recommended: PS-A12060). Power consumption is 2W max, so no oversized supply needed. Response time is 0.5 millisecond — fast enough for access control and alarm triggers. The relay output delivers 30 VDC @ 0.5A, suitable for driving low-power solenoids and logic inputs on remote devices. Industrial temperature rating (-40°C to +75°C operating, -40°C to +85°C storage) supports outdoor fiber termination cabinets. Install the transceiver pair at each end of the fiber link; one unit transmits contact closure state, the peer unit presents it as a relay closure on its output terminal block. MTBF exceeds 100,000 hours — expect 11+ years mean time between failures under typical duty cycles.