The MSR42 multi-function safety relay is the control module for the GuardShield Micro 400 safety light curtain, but can also be used with any light curtain. This versatile Category 4 safety device has a pair of PNP solid state, 400 mA OSSDs for direct connection to the final switching device. When safety relay outputs are required, the MSR42 easily accommodates the interconnection of up to three MSR45E safety relay expansion modules, each providing a pair of safety relay outputs. Simply connect ribbon cable connectors from the back of the MSR42 to each of the MSR45E modules for a series of interconnections for two PNP OSSDs, and six N.O. relay outputs.

Manual, monitored or automatic reset
Thirteen diagnostic LEDs
Unique design allows for easy addition of relay expansion modules
Removable terminal blocks
One or two configurable auxiliary, standard outputs
Connection of one or two additional safety devices
RJ45 connections for Micro 400 safety light curtain
Two sensor muting all GuardShield light curtains
Supports up to three MSR45E expander units
Cat. 4 per EN 954-1 (ISO 13849-1), SIL CL3 per EN IEC 61508, PLe per ISO 13849-1

This Allen Bradley Guardmaster output module from Rockwell Automation is a safety relay that operates and monitors the function of a light curtain. It supports workplace safety and machine control to help prevent hazards in your workspace. As the device resists vibration and shock it's suitable to use in harsh industrial environments. You can connect up to three safety relay expansion modules to this unit, to conveniently increase the capacity of your monitoring functions. It snaps easily onto a DIN rail for quick and tool-free installation. With a mechanical lifespan of up to 10 million operations, you can rely on the longevity of this safety relay.

• IP20-rated enclosure that's protected against human touch and objects larger than 12mm
• Wide operating temperature range of 0°C to +55°C for compatibility with demanding settings
• Includes LED indicators for quick visual status analysis
• Low power consumption of 1.5W for energy-efficiency

• EN
• IEC
• CE

You connect expansion modules to this relay by using ribbon cables.