OMC-183-ML Manual
Page 12
2.10.
OMC-443
Temperature sensor (4-20mA)
Recommended cable: shielded 2x0,75mm2 twisted pair
This type of sensor comes in different versions. They all are loop powered 4-20mA
sensors.
2.11.
OMC-938/939
Display (RS422 / OMC-2900)
Recommended cable: shielded 2x0,75mm2 twisted pair
The OMC-938 is usually connected to the RS422 output of the OMC-183-ML.
With the OMC-183-
ML it’s no longer optional to use current loop output.
Reconfigure the OMC-938/9 to RS422 if required, see OMC-938/939 manual.
OMC-183-ML
OMC-406 NMEA
SUPPLY
27
Power +24V
0-24 mA INPUT 2
28
4-20mA out
(Air temperature)
OMC-183-ML
OMC-938
GND [SUP]
1
1
POWER SUPPLY V- (GND)
VIN [12-24VDC]
2
2
POWER SUPPLY V+ (12-24V)
NMEA_RTRN_A
6
3
RS 422 TXA (-)
NMEA_RTRN_B
7
4
RS 422 TXB (+)
SHIELD
8
