Vertu Series VPM3000 Process Meters & Temperature Transmitters
Instruction Manual
15
4-20 mA Output & Input Signal
Connections
The Vertu VPM3000, with an optional 4-20 mA output,
can be used as an isolated temperature transmitter
with a big display by converting the thermocouple or
RTD input into an isolated 4-20 mA output.
Connections for the 4-20 mA transmitter output
are made to the connector terminals labeled
“mA OUT: I-, I+”. The 4-20 mA output may be
powered from an internal power supply (optional)
or from an external power supply.
Figure 25. 4-20 mA Output & Input Signal
Powered by Meter
Model includes VPM3112
Figure 26. 4-20 mA Output Powered by Meter
Model includes VPM3121
Figure 27. 4-20 mA Output Powered Externally
Models include VPM3110, VPM3210, and VPM3220
COM
SIGNAL CONNECTOR
mA+
2
1
3
5
4
V+
T+
EXC
2-Wire
4-20 mA
Transmitter
-
+
I-
mA OUT
P2-
P1+
4
5
3
1
2
P2+
P1-
24V OUT
6
I+
Remote Display,
Chart Recorder,
etc.
+
-
I-
mA OUT
5
6
I+
Remote Display,
Chart Recorder,
etc.
+
-
24V OUT
P+
P-
1
2
External
Power
Supply
-
+
I-
mA OUT
5
6
I+
Remote Display,
Chart Recorder,
etc.
+
-
