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page 4
OMEGA
FP90 Series Flow Transmitter Instructions
Terminals 5-10: Relay Outputs
Two sets mechanical SPDT contacts,
programmable (see CALIBRATE menu) as:
• High or Low with adjustable hysteresis
• Volumetric pulse based on totalizer
• May be disabled (Off) if not used.
Terminals 3 and 4: Loop Power
12-24 VDC ±10% system power
and current loop output.
Max. loop impedance:
50 max. @ 12 V
325 max. @ 18 V
600 max. @ 24 V
Terminals 11-13: Flow sensor input
See next page for more information.
Terminals 1 and 2: AUXILIARY power
12-24 VDC ±10% provides power for relay operation.
FP90-2 Wiring
System Pwr
Loop -
System Pwr
Loop +
AUX
Power -
AUX
Power +
4
3
2
1
Sensr Gnd
(SHIELD)
Sensr IN
(RED)
Sensr V+
(BLACK)
13
12
11
Relay 2
(NO)
Relay 2
(COM)
Relay 2
(NC)
Relay 1
(NO)
Relay 1
(COM)
Relay 1
(NC)
10
9
8
7
6
5
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
Example: Two transmitters connected to PLC/Recorder with separate power supply
-
+
PLC or Recorder
Loop Input
4-20 mA
System Pwr Loop -
System Pwr Loop +
AUX Power -
AUX Power +
4
3
2
1
4
3
2
1
Transmitter
Terminals
Power
Supply
12-24 VDC
-
+
System Pwr Loop -
System Pwr Loop +
AUX Power -
AUX Power +
4
3
2
1
+
-
PLC or Recorder
Channel 1
4-20 mA in
Channel 2
4-20 mA in
+
-
-
+
Transmitter 1
Terminals
System Pwr Loop -
System Pwr Loop +
AUX Power -
AUX Power +
System Pwr Loop -
System Pwr Loop +
AUX Power -
AUX Power +
4
3
2
1
4
3
2
1
Transmitter 2
Terminals
4
3
2
1
PLC Terminals
Loop Input
4-20 mA
Transmitter
Terminals
System Pwr Loop -
System Pwr Loop +
AUX Power -
AUX Power +
4
3
2
1
+
-
Power
Supply
12Ð24 VDC
-
+
Power
Supply
12-24 VDC
-
+
4
3
2
1
4
3
2
1
* See AUX POWER Note
* See AUX POWER Note
* See AUX POWER Note
* See AUX POWER Note
Auxiliary Power note:
• AUXILIARY Power is required for all systems where relays are used.