3
Signet 8450-3 Pressure Transmitter
16
15
14
13
12
11
Signet 2450
Pressure Sensors
Terminals
White (Snsr 2 Gnd)
Red (Snsr 2 IN)
Black (Snsr 2 V+)
White (Snsr 1 Gnd)
Red (Snsr 1 IN)
Black (Snsr 1 V+)
3.1 Sensor Input Connections
-
+
+
-
+
-
-
+
-
+
+
-
-
+
-
+
-
+
+
-
+
-
-
+
6
5
4
3
2
1
6
5
4
3
2
1
6
5
4
3
2
1
6
5
4
3
2
1
6
5
4
3
2
1
*
Example: Two transmitters connected to PLC/Recorder with separate power supply
Loop 2 -
Loop 2 +
System Power Loop 1 -
System Power Loop 1 +
AUX Power -
AUX Power +
Loop 2 -
Loop 2 +
System Power Loop 1 -
System Power Loop 1 +
AUX Power -
AUX Power +
PLC or Recorder
Channel 3
4-20 mA in
Channel 4
4-20 mA in
Transmitter 1
Terminals
Transmitter 2
Terminals
Channel 1
4-20 mA in
Channel 2
4-20 mA in
Power
Supply
12-24 VDC
*
*
*
* *
*
*
*
Stand-alone application, no current loop used
Transmitter
Terminals
Power
Supply
12-24 VDC
Connection to a PLC with built-in power supply
Internal
PLC Connection
Connection to a PLC/Recorder, separate supply
PLC or Recorder
Loop 2 -
Loop 2 +
System Power Loop 1 -
System Power Loop 1 +
AUX Power -
AUX Power +
Transmitter
Terminals
Loop 2 -
Loop 2 +
System Power Loop 1 -
System Power Loop 1 +
AUX Power -
AUX Power +
Transmitter
Terminals
Loop 2 -
Loop 2 +
System Power Loop 1 -
System Power Loop 1 +
AUX Power -
AUX Power +
Power
Supply
12-24 VDC
PLC Terminals
Channel 1
4-20 mA
Power
Supply
12-24 VDC
Channel 2
4-20 mA
Channel 2
4-20 mA
Channel 1
4-20 mA
NC
NC
AUX power required only where two sensors are used
AUX power required only where two sensors are used
AUX power required only where two sensors are used
AUX power required only where two sensors are used
3.2 System Power/Loop Connections
A
B
A
B
C
Signet Pressure
Transmitter
Pressure Cal:
0.0 psi >
ENTER
Signet Pressure
Transmitter
Pressure Cal:
0.0 psi >
ENTER
Transmitter
A + B
400 ft. (122 m)
J-box
Transmitter
A + B + C
400 ft. (122 m)
Signet Pressure
Transmitter
Pressure Cal:
0.0 psi >
ENTER
Transmitter
400 ft. (122 m)
