Precision Digital PD941 - Manual (Page 15)

ConsoliDator Multi-Channel Controller Instruction Manual
15
Input Signal Connections
Input signal connections are made to terminal connectors, which are labeled individually on
the controller.
4-20 mA Analog Input Connections
Analog 4-20 Input connections are made to three-terminal connectors. The following figures
show examples for typical applications. Each of the 4-20 mA inputs may be connected in
any of the modes shown below.
+
External
Power
Supply
2-Wire
4-20 mA
Transmitter
+ +
ANALOG INPUT
2-Wire 4-20 mA
Self-Powered
Transmitter
+
GND +
GND
ANALOG INPUT
Figure 4. Transmitter Powered by Ext. Supply or Self-Powered
GND
+
2-Wire
4-20 mA
Transmitter
+
ANALOG INPUT
3-Wire 4-20 mA
Transmitter
+
+
Signal
ANALOG INPUT
GND
Figure 5. Transmitters Powered by ConsoliDator
3-Wire 4-20 mA
Transmitter
GND
+
Signal +
ANALOG INPUT
External Power
Supply
+
Signal - Power +
Figure 6. Three-Wire Transmitters Powered Externally