[email protected] | Installation manual Omnicomm 2.0 terminals v2.2
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APPENDIX F
Examples of settings when using di
ff
erent methods
to connect to universal inputs of Omnicomm2.0 Terminals
Example 1. Omnicomm analog temperature sensor
Purpose: to measure the temperature
Omnicomm (Figure 51). Sensor supply voltage ranges from 20–30 V; therefore, connection must be
established as shown in Figure 92.
FIGURE 51
The following parameters must be preset in Omnicomm Con
fi
gurator:
Parameter
Value
Input type
Analog
Minimum value of the measured value
- 40 (°
С
)
Pressure, corresponding to the minimum value (V)
0.8
Maximum value of the measured value
125 (°
С
)
Pressure, corresponding to the maximum value (V)
14.0
Note: if the maximum or minimum values of measurement sensor are unknown, you are allowed to specify
any two known values; the program will automatically generate a linear approximation of these values.
Example 2. Analog sensor with output signal 4–20 mA
Purpose: measurement of pressure, temperature and humidity
Example, Analog Pressure Sensor with output current signal 4–20 Ma that measures pressure from 0–1
MPa (10 bar). An available resistor with 910 Ohms - 0.25% - 1 W was selected to connect to the Terminal, as
shown in Figure 94.
It is necessary to determine the range of resistor voltage drop for extreme current values. Calculation in
accordance with Ohm’s law is as follows: