page 3 of 8
‡ SIGNET
8550-1 Flow Transmitter
3.1 System Power/Loop Connections
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.
Transmitter
≤ 200 ft. (61 m)
Transmitter
≤ 1000 ft. (300 m)
Maximum cable length is 200 ft. for 515/8510-XX, 525 , 2517 and
any sinusoidal flow signal.
Maximum cable length is 1000 ft. for 2536/8512-XX, 2540, vortex,
and any square wave flow signal.
Stand-alone application, no current loop used
Transmitter
Terminals
4
3
2
1
Sys. Pwr.
Loop -
Sys. Pwr.
Loop +
AUX
Power -
AUX
Power +
Power Supply
DC 12 - 24 V
Power
Supply
Power
Supply
Connection to a PLC with built-in power supply
PLC
Terminals
Power Supply
Ground
Power
Supply
Loop Input
4-20 mA
Loop Input
4-20 mA
Internal PLC
Connection
Connection to a PLC/Recorder, separate supply
PLC or Recorder
Loop Input
4-20 mA in
Loop Input
4-20 mA in
DC 12 - 24 V
Power
Supply
Power
Supply
Example: Two transmitters connected to PLC/Recorder
with separate power supply
Transmitter 2
4
3
2
1
DC 12 - 24 V
Power
Supply
Power
Supply
Transmitter 1
4
3
2
1
Transmitter
Terminals
4
3
2
1
Sys. Pwr.
Loop -
Sys. Pwr.
Loop +
AUX
Power -
AUX
Power +
Transmitter
Terminals
4
3
2
1
Sys. Pwr.
Loop -
Sys. Pwr.
Loop +
AUX
Power -
AUX
Power +
Sys. Pwr.
Loop -
Sys. Pwr.
Loop +
AUX
Power -
AUX
Power +
Sys. Pwr.
Loop -
Sys. Pwr.
Loop +
AUX
Power -
AUX
Power +
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
* See AUX POWER Note
* See AUX POWER Note
* See AUX POWER Note
* See AUX POWER Note
-
+
-
+
-
+
-
+
-
+
-
+
-
+
-
+
Auxiliary Power note:
AUXILIARY power is used only if the flow sensor requires more
than 1.5 mA current. For Signet sensors this is limited to the
following products:
• 2000
• 2507
• 2530
• 2535
• 2540 if mfg. prior to Jan 1999
No Aux Power
515
525
2100
2517
2536
2540
3-8510-XX
3-8512-XX
Aux Power
2000
2507
2530
2535
2540 (mfg prior to Jan 1999)
Terminals
Sensr Gnd
(SHIELD)
Sensr IN
(RED)
Sensr V+
(BLACK)
9
8
7
