Wiring A Digital Output To The Optional Relay - Emerson FB2100 Instruction Manual

Figure 3-9. Wiring for 3-Wire
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Figure 3-10. Wiring for 4-Wire
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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
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.
I/O Configuration and Wiring
3-Wire RTD
4-Wire RTD
Emerson FB2100 Flow Computer Instruction Manual
(Figure 3-11). You must also use the isolated GND and
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