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Bosch Rexroth AG
Connecting and removing cables
7.9.4
Redundant signals
If you are using I/O modules redundantly, connect the modules as shown in
19.
In the example, the two modules are located in two IndraControl S20 stations.
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Fig. 7-19
Example: connection for redundant use
IN8
U
S
GND
CAUTION
To avoid malfunction, make sure that the GND connection shown in
tablished as the reference potential to the redundant signal inputs.
Make sure that, in the event of a short circuit of the sensor supply, the effects are
limited by providing decoupling (longitudinal diode).
DOK-CONTRL-S20*SYS*INS-AP02-EN-P
IndraControl S20 System and Installation
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E2
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a1
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a2
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b1
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b2
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+
24 V DC
Digital input 8
Sensor supply
Reference potential
Malfunction
Fig. 7-
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IN8
U
S
GND
Fig. 7-19
is es-
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