Siemens SIMATIC NET SCALANCE W788-x User Manual

Connecting up
6.5 Digital input/output
SCALANCE W788-x / W748-1
Operating Instructions, 03/2022, A5E03678333-17
57
6.5 Digital input/output
A digital input/output is only available with the RJ-45 variants.
The digital output (relay contact) is a floating switch with which error/fault states can be
signaled by breaking the contact.
NOTICE
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.
The digital input/output is connected to a 4-pin plug-in terminal block with the following
pin assignment:
Pin
Signal
Function
1
DQ (output)
Relay 24 VDC / 1 A
2
1L (output)
Relay 24 VDC / 1 A
3
DI (input plus)
24 VDC
4
1M (ground)
-
6.6 Grounding
Grounding
The device has a grounding connector on the back of the device (screw M4), see position
① in the drilling pattern (Page 41). Connect the grounding cable before you mount the
device. Refer to the information in the section Installation and removal (Page 37).

Siemens SIMATIC NET SCALANCE W788-x Specifications

General

Brand	Siemens
Model	SIMATIC NET SCALANCE W788-x
Category	Industrial Equipment
Language	English