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SCOM-100, User guide
2.2. Digital inputs
SCOM-100 has 4 built in digital inputs, which can be
expanded by the DIO-42 expansion modules. The digital
inputs are wired by means of screw terminals.
The digital inputs can be driven either by switches or
transistors (open collector stages).
push-pull output are also applicable.
Note: Output voltages higher than +5V or negative
voltages (lower than GND) will be clamped
from the comparator input protection zener.
The impedance of the input circuit is, in this
case, 4.7K. An external transducer with 24V
output must be capable of driving a current of
5 mA.
9
Transducers with
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