Meeting needs for future expansion and full/partial stop options with easy implementation.
Feature 1 Easy to configure small-scale safety control without a program ● The safety relay module is suitable for small-scale safety control. ● A safety circuit can be configured by just wiring. Programs or complex parameter settings are not required.
Feature 2 Easy to add safety control to existing the MELSEC-Q series ● Safety control can be easily added to an existing MELSEC-Q series programmable controller by mounting/connecting the safety relay module to the MELSEC-Q base unit or CC-Link. ● Operating/error status of the safety relay module can be monitored from the existing MELSEC-Q series programmable controller. By visualization of safety systems, identification of the cause of emergency stop or investigation of error point become more efficient. When using 3rd party safety relay modules Time-consuming wiring
3rd party safety relay module
MELSEC Q series (Standard control)
In order to monitor the safety circuit on standard control side, an input module must be added and wiring for monitoring signals is needed. Also, power must be supplied, thereby requiring more wiring.
Lack of monitoring information Normally only status of the safety output can be monitored. It is difficult to find out the cause of safety circuit operation because only off status of the safety output can be monitored.
When using Mitsubishi safety relay modules
Wiring for the input module and monitoring signal lines is required for monitoring.
Normally only status of the safety output can be monitored.
■Example of troubleshooting with the safety relay module's monitor function Standard control
Powerful monitor functions
Safety control
MELSEC Q series
In addition to monitoring the safety output state, the status of the safety relay in the module, including safety input status (ON/OFF), coil drive status and relay contact ON/OFF are monitored. For example, welding caused by a mismatch of the coil drive status and relay setting state can be detected!
Error!
Simple wiring There’s no need to wire the monitor!
<Monitor signal status> K1 relay K1 relay K2 relay contact side contact side coil side OFF
ON
OFF
K2 relay coil side OFF
Start input ON
Safety output ON
Safety input 1 OFF
Safety input 0
Cause
OFF
Welding of safety relay contact
The contact side is ON even though the safety relay’s coil side is OFF means the safety relay contact has welded!
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