OMC-131 True wind display
Users’ manual
V1.14
Page 8
TDC-April-2017
2.2.3 Connections
All connections to the OMC-131 display are made to the rear of the display as shown on the
drawing below.
If the Observator Instruments wind sensors are used, the terminals 1. 2. 3, and 4 are used for sensor 1
and the numbers 7, 8, 9 and 10 for sensor number 2.
1, 7, 13, 19
= -15 Vdc sensor supply
2, 8, 14, 20
= +15 Vdc sensor supply
3, 9, 15, 21
= - serial currentloop input, or RS422 input*
4, 10, 16, 22
= + serial currentloop input, or RS422 input*
5
= - output currentloop or RS422*
6
= + output currentloop or RS422*
11, 17, 23
= - output RS422
12, 18, 24
= + output RS422
28,29
= remote brightness control or 200 ppm log or manual selection wind sensor
30
= not used
31
= not used
32
= not used
33
= - analogue speed output 4..20 or 0..1(0) Volt**
34
= + analogue speed output 4..20 or 0.. 1(0) Volt**
35
= - analogue direction output 4..20 mA or 0.. 1(0) Volt**
36
= + analogue direction output 4..20 mA or 0.. 1(0) Volt**
* Default = RS422
** Optional (requires OMC-127 analogue output kit), default is 4-20mA
