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Safe I/O dual channel connection
The safety digital base devices are set up with dual channels. See
The following example shows how to connect a safe sensor to an input of the safe
scalable I/O unit, and how to connect a safe switch to a safe output:
Safe I/O
+24V_IN
GND
SDO_1_-
SDI_1_-
SDO_2_-
SDI_2_-
SDI_3_-
SDI_4_-
Safety
controller
Industrial network
GND
GND
GND
GND
Sensor
GND
Output
GND
Output
xx2200000441
Safety digital base device used as dual channel safety output
Safe I/O
+24V_IN
GND
GND
STO_1
STO_2
GND
Safety
controller
Industrial network
GND
GND
Inverter
&
DC/AC
M
xx2200000566
Continues on next page
46
Application manual - Scalable I/O
3HAC070208-001 Revision: F
© Copyright 2019-2022 ABB. All rights reserved.
3 Hardware installation
3.3 Installing safety digital base devices
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