9
Connections
3.2 1 Output connection
The outputs are not polarised and are isolated from the device's supply voltage by functional isolation (non-reinforced); this allows the connection of output signals
with reference voltages that differ from the supply voltage of the 21125 electronic control unit, provided they have SELV power supplies.
Illustrated below are two examples of the wiring layouts that can be achieved.
Example 1: Connection with output contacts that close to the power supply negative (-) (most frequently used case).
The outputs can be connected to a third-party device with internal pull-up inputs.
The outputs common is to be connected directly to the power supply negative (+).
9-32V
100mA
INPUTS
I2
I4
I6
I8
NC
NC
I1
I3
I5
I7
NC
C IN
O1
O2
O3
O4
O5
O6
O7
NC
C OUT
OUTPUTS
O1
O2
–V
+V
C OUT
Example 2: Connection of small indicator lights.
The outputs can be connected to indicator lights with characteristics compatible with the maximum voltage and current values of the 21125 electronic control unit.
The outputs common is to be connected directly to the power supply positive (+).
9-32V
100mA
INPUTS
I2
I4
I6
I8
NC
NC
I1
I3
I5
I7
NC
C IN
O1
O2
O3
O4
O5
O6
O7
NC
C OUT
OUTPUTS
O1
O2
–V
+V
C OUT
Содержание 21125
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