Troubleshooting In Case Of Cascading; Fig. 10: Troubleshooting With Cascaded Safety Switches - SICK TR4 Betriebsanleitung

GB
Chapter 8
Note
Fig. 10: Troubleshoo-
ting with cascaded
safety switches
162
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Fault diagnosis
8.4

Troubleshooting in case of cascading

If an error occurs on TR4 safety switches used in a cascade, the related
device indicates the error state (Status/Diag LED flashes
switches off its safety outputs. In this case all other downstream TR4
safety switches also switch off their safety outputs and the Status/Diag
LEDs flashes Green.
The safety switches ahead of a device with an error in the cascade can-
not detect the error state. Their Status/Diag LED continue to illuminate
Green if their actuators are in the response range.
Switch 1 Switch 2
Green
Actuator 1 Actuator 2
Switch 3 Switch 4
Green Red
Actuator 3 Actuator 4
Operating Instructions
Red) and
Switch 5
Green Green
Actuator 5
8014465/2012-05-07
Subject to change without notice
TR4