Rockwell Automation Publication 440R-UM013F-EN-P - July 2021 11
Chapter 1 Overview
The main input to the EMD safety relay is the single wire safety input. With the
SWS signal, the EMD safety relay is designed to expand the outputs of the GSR
family of host relays. The EMD safety relay also has an SWS output for further
expansion.
An additional input is used with the jog function or to set the off delay as
retriggerable. See EMD Safety Relay Timing Functions on page 39
for detailed
descriptions on the EMD safety relay timing functions.
SI Safety Relay
(Cat.No.440R-S12R2)
The SI safety relay has one dual-channel input with two electromechanical
relay outputs. The SI safety relay can be configured for automatic or
monitored manual reset by adjusting the switch on the front. The SI safety
relay also has an SWS output.
The SI safety relay is similar in functionality to the MSR126 safety monitoring
relay.
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