GF Signet 8850-2 Manual page 3

3.1 System Power/Loop Connections
Stand-alone application, no current loop used
Transmitter
Terminals
Sys. Pwr.
4
Loop -
Sys. Pwr.
3
Loop +
AUX 2
Power -
1
AUX
Power +
Connection to a PLC/Recorder, separate supply
Transmitter
Terminals
Sys. Pwr.
4
Loop -
Sys. Pwr.
3
Loop +
AUX
2
Power -
AUX 1
Power +
AUX power required for all 8850 systems
3.2 Sensor Input Connections
Wiring Tips:
• Do not route sensor cable in conduit containing AC power wiring. Electrical noise may interfere with sensor signal.
• Routing sensor cable in grounded metal conduit will help prevent electrical noise and mechanical damage.
• Seal cable entry points to prevent moisture damage.
• Only one wire should be inserted into a terminal. Splice double wires outside the terminal.
Select the sensor with a range closest to your process minimum
and maximum values.
2819-1 (0.01 cell): 0.055 to 100 µS (10 kΩ to 18 MΩ)
•
Use the 2819-1 for all resistivity requirements
• 2820-1 (0.1 cell):
• 2821-1 (1.0 cell):
• 2822-1 (10.0 cell):
• 2823-1 (20.0 cell):
Shield (Sensor Gnd)
14
Black (Iso Gnd)
13
White (Temp In)
12
Red (Signal In)
11
Terminals
‡ SIGNET 8850-2 Conductivity/Resistivity Transmitter
Power Supply
DC 12 - 24 V
Power
-
Supply
Power
+
Supply
DC 12 - 24 V
- Power
Supply
Power
+
Supply
PLC or Recorder
-
Loop Input
4-20 mA in
Loop Input
+
4-20 mA in
1 to 1000 µS
10 to 10,000 µS
100 to 200,000 µS
200 to 400,000 µS
+GF+ SIGNET 28XX-1
Standard and Certified Cells
Connection to a PLC with built-in power supply
Transmitter
Terminals
Sys. Pwr.
4
Loop -
Sys. Pwr. 3
Loop +
AUX 2
Power -
1
AUX
Power +
Example: Two transmitters connected to PLC/Recorder
Transmitter 1
Sys. Pwr.
4
Loop -
Sys. Pwr.
3
Loop +
AUX
2
Power -
AUX 1
Power +
Transmitter 2
Sys. Pwr.
4
Loop -
Sys. Pwr.
3
Loop +
AUX
2
Power -
AUX
1
Power +
Ultra-
Pure Pure Rinse
2823-1
2822-1
2821-1
2820-1
2819-1
0.055 1 10 100 200 1,000
(10 kΩ)
(18 MΩ)
Conductivity Range (µS)
≤ 100 ft. (30 m)
Conductivity/Resistivity
62.50 uS/cm
25.0°C
ENTER
PLC
Terminals
Power Supply
-
Ground
+ Power
Supply
-
Loop Input
4-20 mA
+
Loop Input
4-20 mA
Internal PLC
Connection
with separate power supply
DC 12 - 24 V
Power
Supply
Power
Supply
PLC or Recorder
Channel 1
-
4-20 mA in
+ Channel 1
4-20 mA in
- Channel 2
4-20 mA in
+
Channel 2
4-20 mA in
+GF+ SIGNET Sensor Ranges
10,000 200,000 400,000
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