IM-P337- 6 9 EMM Issue 2
25
+
-
+
-
5.2 Loop power wiring
Connect 4-20 mA loop power (24 Vdc +/-10% at 25 mA, 1W max.) to the +Loop Power and Loop Power
terminals on the terminal block.
WARNING
Ensure the EIA/TIA 485 power connection is not wired up if connecting a power supply to the
loop input.
Fig. 20 Loop powered connections
Fuse
1A
Fuse
T1A
Fuse
T1A
Power (+)
In (-)
+24 Vdc
=/-10%
250
ohm
max
Remote NPN input
Remote PNP input
Power (max 28 Vdc)
Power (max 28 Vdc)
0 Volts
0 Volts
230 V
50 Hz
L
1
2
3
4
5
N
Or
Or
M750 display unit
with 4-20mA active
input (supplying
current loop)
Loop powered
4-20 mA active display unit,
chart recorder or current
measuring DAQ device
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