blad 31 van 57
OBSERVATOR
Instruments
Technical User Manual
OMC-045-II
6.11.2 Analogue
OMC-350 water level meter (potentiometer)
The auto calibrate option in OMC-Programmer is available if an extra known sensor offset must
calculated. Examples can be found in the appendices.
terminal
Name
Description
X4.9
GND
X4.10
AI5
Loper
X4.11
VREF
Potentiometer input channel A5
4-20 mA sensor (2-wire)
Up to 4 channels can be used to measure 4 – 20 mA sensors. The inputs are calibrated at 4 – 20 mA and
scaled using the setting from OMC-Programmer. The auto calibrate option in OMC-Programmer is
available if an unknown sensor offset must calculated. Examples can be found in the appendices.
terminal
name
Description
X4.1
GND
X4.2
AI1
4-20 mA input channel A1
X4.3
GND
X4.4
AI2
4-20 mA input channel A2
X4.5
GND
X4.6
AI3
4-20 mA input channel A3
X4.7
GND
X4.8
AI4
4-20 mA input channel A4
OMC-506
terminal
name
Description
Color
X4.1
GND
X4.2
AI1
4-20 mA input channel A1
White (power -)
X2.3
GND
X2.4
VOUT1+
Black (power +)
X2.5
GND
X2.6
VOUT1+
Switched power supply output for
sensors (output 1)
Terminals X2.4 and X2.6 are internally
interconnected
Vout2 can also be used.