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page 5
OMEGA
FP90 Series Flow Transmitter Instructions
1
Internal open-collector
output circuit
Outputs
Isolation
15
Ω
S
D
2
_
+
Terminals 3-6: Loop Power
12-24 VDC ±10% system power
and current loop outputs.
Max. loop impedance:
50 max. @ 12 V
325 max. @ 18 V
600 max. @ 24 V
Terminals 11-16: Flow sensor inputs
See Sensor Input section for more information.
Terminals 7-10: Open-collector Outputs
Two transistor outputs, programmable (see CALIBRATE menu) as:
• High or Low with adjustable hysteresis
• Pulse based on Volume.
• Frequency based on ow rate
• May be disabled (Off) if not used.
Terminals 1 and 2: AUXILIARY power
Used only if the ow sensor requires more than 1.5 mA current.
Refer to your ow sensor speci cations for this information.
FP90-3 Wiring
Output 2-
Output 2+
Output 1-
Output 1+
10
9
8
7
Loop 2-
Loop 2+
System Pwr
Loop -
System Pwr
Loop +
AUX
Power -
AUX
Power +
6
5
4
3
2
1
Snsr 2 Gnd
(SHIELD)
Snsr 2 IN
(RED)
Snsr 2 V+
(BLACK)
Snsr 1 Gnd
(SHIELD)
Snsr 1 IN
(RED)
Snsr 1 V+
(BLACK)
16
15
14
13
12
11
Stand-alone application, no current loop used
Trans mitter
Terminals
P ower
S upply
12–24 V DC
Connection to a PLC with built-in power supply
Internal
PLC Connection
Connection to a PLC/Recorder , separate supply
Example: T wo transmitters connected to PLC/Recorder with separate power supply
–
+
P L C or R ecorder
Loop 2 –
Loop 2 +
System Power Loop 1 –
System Power Loop 1 +
AUX Power –
AUX Power +
6
5
4
3
2
1
Trans mitter
Terminals
Loop 2 –
Loop 2 +
System Power Loop 1 –
System Power Loop 1 +
AUX Power –
AUX Power +
6
5
4
3
2
1
6
5
4
3
2
1
Trans mitter
Terminals
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 +
6
5
4
3
2
1
6
5
4
3
2
1
Loop 2 –
Loop 2 +
System Power Loop 1 –
System Power Loop 1 +
AUX Power –
AUX Power +
P ower
S upply
12–24 V DC
–
+
P L C or R ecorder
Channel 3
4-20 mA in
Channel 4
4-20 mA in
–
+
–
+
Trans mitter 1
Terminals
Trans mitter 2
Terminals
P L C Terminals
Channel 1
4-20 mA
+
–
Power
Supply
12–24 VD C
Channel 2
4-20 mA
+
–
–
+
Channel 2
4-20 mA
+
–
Channel 1
4-20 mA
–
+
Channel 1
4-20 mA in
Channel 2
4-20 mA in
+
–
+
–
P ower
S upply
12–24 V DC
–
+
NC
NC
Auxiliary Power Note:
Auxiliary power is necessary for flow sensors that require more than 1.5 mA of current.