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Article Number4208784
Dräger Regard 3900 Relay Board



Dräger Regard 3900 Relay Board Each relay output board is populated with eight additional SPCO relays. Relay 1 on each relay board is a dedicated Fault relay and cannot be reconfigured. The remaining seven relays can be configured as Single, Common, Voting, Inhibit or Non-operational. An additional Alarm 3 level is offered by the relay board along with a second Fault threshold. All configurable relays can be Rising/Falling, Latching/Non Latching and normally energised/ energise on alarm. Alarm relays are acknowledged via the push button located on the front panel of the instrument housing. A maximum of two relay boards can be installed in a single Dräger REGARD 3900 control system.