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LOAD CELL INPUT PROGRAMMING
Refer to cell manufacturer's documentation, particularly with respect to the cell sensitivity and supply voltage
specifications.
As load cell indicator the meter's function is to measure forces (weight, pressure, torque...) applied to a disposi-
tive connected to several bridge type transducers such as load cell, which supply signal levels up to ±150 mV.
The two excitation voltages supplied by this instrument are 10 V and 5 V. The selection is realised through the
configuration of the internal bridge excitation (see Fig.). This way up to 2 cells can be connected in parallel with
10 V excitation and up to 4 cells with 5 V excitation, without need for an external source (see connection Page.
17).
Example:
2 cells with 2 mV/V sensibility are supplied with an excitation voltage of 10 V; the voltage generated by
each cell at full load is 20 mV, being 20 mV the maximum as the cells are connected in parallel. In the
same case but with a 5 V excitation, the maximum voltage generated will be 10 mV.
Software configuration requires selection of the input range which may be selected high enough for the maximum
input signal to avoid overloads. There are three ranges: ±15 mV, ±30 mV and ±150 mV
Example:
If a weighing process gives 12 mV to the meter input with maximum load, the best input range to select will be
"15 mV".
LOAD CELL WIRING (mV/ V)
Refer to wiring guidelines in Page. 76
Instrument's rear view
KOSMOS SERIE
Selection of voltage excitation 10 V or 5 V
5 V Exc.
10 V Exc.
www.ditel.es
Jumper on
Jumper off
INPUT SIGNAL CONNECTOR
CN2
PIN 1 =
-EXC
[excitation output (-)]
PIN 2
+EXC
[no connection]
PIN 3 = +EXC
[excitation output +5V or 10 V (+)]
PIN 4 =
N/C
[no connection]
PIN 5 =
N/C
[no connection]
PIN 6 =
N/C
[no connection]
PIN 7 = +mV
[input mV (+)]
PIN 8 =
-mV
[input mV (-)]
MICRA-M
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