FDD0001-02
3-Channel Dry Contact Detector
The 3-Channel Dry Contact Detector from Fidar Electronics reads the open or closed state of volt-free equipment contacts and turns every change into an alertable event. It connects to a FIDAQUIRE data logger over a daisy-chained CANopen bus.
Reads the state of a volt-free contact
Three independent input channels in one unit
Works with any dry-contact output
Timestamps every change of state
RJ45 output on a CANopen bus
Daisy-chains up to 64 sensors per card
Works with the FBC0232-01 card and FIDAQUIRE logger
Up to 500 m of bus at 125 kbit/s
The dry contact is the simplest and most widely used industrial signal there is: any device with a volt-free status contact — a door microswitch, a limit switch, a UPS alarm output, a fire panel, an intruder alarm, a contactor auxiliary — connects to the monitoring system through this detector. It reads whether the contact is open or closed and timestamps every change of state, and it supplies the sensing voltage itself, so no separate supply is needed.
Key features
Reads the state of a volt-free contact
Three independent input channels in one unit
Works with any dry-contact output
Timestamps every change of state
RJ45 output on a CANopen bus
Daisy-chains up to 64 sensors per card
Works with the FBC0232-01 card and FIDAQUIRE logger
Up to 500 m of bus at 125 kbit/s
Connectivity
RJ45 CANopen output running at 125 kbit/s
Daisy-chain of up to 64 sensors on one FBC0232-01 card
Automatic input-break detection reported to the logger
Where it is used
Door status on racks, cabinets and equipment rooms
Reading alarm outputs from UPS, generators and boards
Bringing fire and intruder panels into monitoring
Contactor, relay and thermal-trip status in a panel
Limit switches and level switches on a production line
Proving run/stop state from an auxiliary contact
Installation
Keep the input wiring away from power cable; on long runs, shielded cable stops induced noise from producing phantom state changes.
