Electrical Terminations; Wiring: 3-Wire, 0 To 5, 0 To 10, 1-5Vdc, And Remote Zero - Setra Systems 231RS Operating Instructions Manual

3.2 Electrical termination
Wiring: 3-Wire, 0 to 5, 0 to 10, 1-5 VDC and Remote Zero
Model 231RS when configured for voltage output is a 3-wire circuit device with three terminals
available for wiring. The -Excitation and -Output are commoned on the circuit.
Model 231RS can operate from 15-30 VDC (18-30 VAC) nominal output power supply.
Note: The Zero terminals, connected to digital output, provide a contact closure relay for
automatic reset to zero pressure by the monitoring system.
CAUTION: ZERO input is for dry contact, do no apply voltage to ZERO Terminals
The optional remote zero is a normally open relay wired between COM and REMOTE ZERO
terminals. In order to initiate ZERO function the relay contact should be closed.
DC/AC
+
Power Supply
Controller
+
Voltage
Relay
Figure 5
8