Siemens SCALANCE M874 User Manual

Connecting up
3.5 Digital input/output
SCALANCE M874, M876
Operating Instructions, 06/2015, C79000-G8976-C331-05
37
3.5
Digital input/output
The digital input/output (relay contact) is a floating switch with which error/fault states can be
signaled by breaking the contact.
CAUTION
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.
Digital input
The 2-pin terminal block has the following assignment:
DI+
24 VDC
DI- (input ground)
-

Siemens SCALANCE M874 Specifications

General

Brand	Siemens
Model	SCALANCE M874
Category	Network Router
Language	English