Emerson FB2100, Инструкция по эксплуатации

Страница: 73 / 116

Emerson FB2100 Flow Computer Instruction Manual
D301783X012
March 2019
I/O Configuration and Wiring 69
Figure 3-9. Wiring for 3-Wire
1 3-Wire RTD
Figure 3-10. Wiring for 4-Wire
1 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.