Mircom OpenBAS-HV-NX10 Series Installation Manual page 26

Table 4 Analog Input Wiring (Continued)
Type of field device Power source
24 V powered
transducer with 1-10
VDC output
Transducer with 1-10
VDC output
Transducer with 1-10
VDC output
2-wire transducer with 4-
20 mA or 0-20 mA output
Connect an external 250
Ω ½ Watt 1% load
resistor in parallel
between the universal
input terminal and 0V to
provide a return path for
the transducer signal
current.
26 (45)
24 V external power
supply common to field
device and controller.
Power can be 24 VDC or
VAC as required by the
field device.
External power supply for
field device (depends on
field device requirements)
and 12 VDC external
power supply for
controller.
Connect the negative or
common of both power
supplies to the 0V
terminal of the controller.
External power supply for
field device (depends on
field device requirements)
and 24 V external power
supply for controller.
Connect the negative or
common of both power
supplies to the 0V
terminal of the controller.
12 VDC power supply
common to field device
and controller.
Wiring diagram
24 V
Field Device
24V
Signal
0V
0 V
Field Device
+
+
Power Supply
Signal
-
-
Field Device
+
+
Power Supply
Signal
-
-
12VDC
Field Device
+
-
0 V
Field Wiring
Controller
24V
UI#
0V
Controller
+
+12
12VDC
Power Supply
UI#
-
0V
Controller
+
24V
24VAC or VDC
Power Supply
UI#
-
0V
Controller
+12
UI#
0V