Emerson FB2100 - Wiring a Digital Output to the Optional Relay

FB2100 Flow Computer Instruction Manual
D301783X012
November 2023
76 I/O Configuration and Wiring
Figure 3-10. Wiring for 4-Wire
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4-Wire RTD
3.7 Wiring a Digital Output to the Optional Relay
The flow computer supports two optional electro-mechanical relays for switching on/off
external circuits or devices. If you order this option, the relays ship from the factory
mounted to the top of the battery compartment inside the flow computer enclosure.
You can wire a relay to an isolated DO (Figure 3-11). You must also use the isolated GND
and provide 24V to power the relay. To attach a wire, insert it into the connector and
tighten the adjacent screw to secure it. The NO and COM wires go to your external circuit
or device.
Figure 3-11. Relay Wired to Isolated DO
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To customer load