Fox Thermal FT3 - 4-20 mA Output Wiring: Customer-Supplied Power Source

4-20
FLOW
TS4
24V
OUT
4-20
#2
Red 1
Red2
Yel 3
Wh 4
Wh 5
PULSE
/ALM
TS2
TS1
F1
J2
1
24V, 0.75A
2 3
IN
+1
+1 -2
-2
+3
-4
+5
-6
+7
-8
TS3
REMOTE
SENSOR
+24VDC
+24VDC
4 to 20mA FLOW RATE
4 to 20mA TEMPERATURE OR
FLOW RATE
24VDC Return
Customer PLC or DCSFT3
24VDC Return
* (see important note below)
* (see important note below)
4-20mA Output Wiring: Customer-Supplied Power Source
Bring the wiring in through the right hand conduit opening. Connect the 4-20mA ow rate and
4-20mA output #2 temperature or ow rate wiring as shown in the diagram below.
CAUTION! When using the 4-20mA output to control equipment in a failsafe application, see
the wiring conguration on p. 40.
Fig. 3.5: 4-20mA Output Wiring for Customer-Supplied Power Source
NOTE!
• When using a 12 volt power supply, the load resistor on the 4-20mA output must be
125 ohms or less to operate properly.
• When using 24 volt power, the load resistor is typically 250 ohms. A 250 ohm resistor in
the 4-20mA circuit will result in a 1 to 5 volt signal to the PLC or DCS.
• When using a 24 volt power supply, the load resistor on the 4-20mA output must be
600 ohms or less.
• Some PLC and DCS equipment have built in load resistors, please refer to the technical
manuals of such equipment.
Wiring | 38
Model FT3
Wiring