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+GF+ SIGNET 8550-1 Flow Transmitter Instructions
3.1 System Power/Loop Connections
3.2
Sensor Input Connections
Wiring Tip:
Do not route sensor cable in any conduit
containing AC power wiring - electrical
noise may interfere with the signal.
3.3 Open Collector Functions
•
Low:
Output triggers when process variable is less than
setpoint.
•
High:
Output triggers when process variable is higher than
setpoint.
Example: In Low Alarm Mode Operation, the output becomes
active when the process drops below the setpoint, and
becomes inactive when the process rises above the setpoint
plus hysteresis. The opposite is true for High Alarm Mode.
Hysteresis
Output active
Output inactive
Time
Setpoint
Process
•
Off:
Disables output pulse.
•
Pulse:
Outputs a pulse whenever a specified amount of
volume has been totalized.
•
Frequency:
Outputs a pulse whenever the divided number of
pulses are input.
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 Note
* See Note
* See Note
* Note: Aux Power connections not required for +GF+ SIGNET
flow sensors: 515, 525, 2100, 2536, 2517, 2540 (since Jan. 99),
8510-XX, 8512-XX, all Vortex frequency output sensors
* See
Note
Terminals
515
525
2100
2517
2536
3-8510-XX
3-8512-XX
2540
Vortex
2000
2507
2530
2535
Sensr Gnd
(SHIELD)
Sensr IN
(RED)
Sensr V+
(BLACK)
9
8
7
* See note
