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MELSEC-QS/WS Series

Safety Relay Module


How to construct a Safety Systems: A Safety Circuit can be easily added to already existing MELSEC-Q series equipment.

Safety relay module

The safety relay module integrates the emergency stop circuit and the restart circuit with a double safety relay. A basic safety function can be realized with just wiring, eliminating the need for programming and parameter settings. Furthermore, the number of I/O points can be increased by adding extension modules.

Safety relay module system configuration drawing


Connecting to field network "CC-Link"
■ Connecting to field network "CC-Link"
Mounting on MELSEC-Q series base unit
■ Connecting to field network "CC-Link"
Product name Model
Q series safety relay module QS90SR2SP-Q
QS90SR2SN-Q
CC-Link safety relay module QS90SR2SP-CC
QS90SR2SN-CC
Extension safety relay module QS90SR2SP-EX
QS90SR2SN-EX
Safety circuit part extension cable QS90CBL-SE01
QS90CBL-SE15