OMC-183-ML Manual
Page 5
1. Introduction
The OMC-183-ML is a signal conditioning unit. It is designed to read and feed multiple sensors
and multiplex these signals to a serial signal. It does not log or store any data. Although the
OMC-183 can be used in many applications, this manual assumes it is used for meteorological
applications.
This manual is intended for qualified engineers with basic electronics knowledge. Usually the
OMC-183-ML is factory configured for your application and no changes besides some optional
user settings are required.
1.1.
Included types of OMC-183-ML
In 2016 the hardware of the OMC-183 has been revised and all types of OMC-183 are included
into one hardware design. The following inputs* and outputs are available:
Inputs name
Functionality
0-5Vdc IN 1
Voltage in no.1
0-5Vdc IN 2
Voltage in no.2
0-5Vdc IN 3
Voltage in no.3
0-5Vdc IN 4
Voltage in no.4
0-24mA IN 1
Current in no.1
0-24mA IN 2
Current in no.1
0-24mA IN 3
Current in no.1
NMEA1 IN
Wind sensor 1
NMEA2 IN
Wind sensor 2
Outputs name
Functionality**
NMEA OUT
RS422 with NMEA
NMEA Return
RS422 with OMC-2900 format
RS232 TX
RS232 RX
Used for firmware upgrade,
configuration ***
* 4 analogue inputs of this list can be selected simultaneously as a maximum.
** The functionality of Current Loop (CL) output is no longer present in the new hardware design.
*** For backwards compatibility OMC-2900 is also at RS232 available after changing user
settings.
