Emerson MAN -0016-00, UVC120 manual Relay Outputs, Current Outputs

OUTPUTS

Relay Outputs:

The Instant, Area and Fault relays have SPDT contacts rated 5 Amps at 30 Volts DC or 250 Volts AC.

The Instant and Area alarm relays are programmable for either normally energized or normally de-energized operation and for latching or non-latching (programmable as a group not individually). The fault relay is only normally energized. The relays can be configured with jumpers for normally open or normally closed contacts.

RECOMMENDATION

The fault relay output should not be used to activate an automatic shutdown procedure. The fault output indicates a potential problem with the controller, not an alarm condition.

Refer to Table 1 for a summary of the relay programming options.

	Selectable Normally	Selectable Normally	Selectable
OUTPUT	Open/Closed	Energized/De-Energized	Latching/Non-Latching
AREA1	Y	Y	Y
INSTANT	Y	Y	Y
FAULT	Y	N2	N 3

Table 1 - Selectable Output Options

1

2

3

Area alarms are programmed together, not individually. Fault relay is normally energized.

Fault relay is non-latching.

Current Outputs:

4-20 mA DC current outputs transmit system information to other devices. The current outputs can be wired for isolated or non-isolated operation by changing the jumpers as shown in Figure 4. Refer to Unit IV, System Operation for a description of the current output signal levels.

- 5 -