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4.4
Digital input/output
The digital input/output is a floating optical switch with which error/fault states can be
signaled by breaking the contact.
Damage due to voltage being too high or too low
The voltage at the digital input/output must not exceed 30 VDC and not fall below -30 VDC,
otherwise the digital input/output will be destroyed.
Note
Interference pulse
Zo avoid evaluating an interference pulse, the pulse for the signal 1 (TRUE / HIGH) must be
at least 200 ms.
Digital input
The 2-pin terminal block has the following assignment:
SCALANCE M812, M816
Operating Instructions, 08/2016, C79000-G8976-C343-04
CAUTION
Connecting up
4.4 Digital input/output
45
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