Norstat is pleased to introduce the ReeR AD SRE4, a Safety Interface designed specifically for use with emergency stop buttons and safety switches.
The AD SRE4 is designed specifically for monitoring emergency stop buttons and safety switches utilizing 3NO + 1NC guided-contact safety relays and offers a response time of < = 50ms. The AD SRE4 also has a Start/Restart that can be set to either Automatic or Manual and has EDM feedback input for external contactors monitoring. There are LED indicators for status and supply diagnostics ( power, channel 1 & channel 2 ) and AD SRE4’s can be used up to safety category 4, PL e according to EN ISO 138-49-1.
Overall size of the AD SRE4 is 99 x 22.5 x 11 with DIN rail fastening and electrical connection on the terminal block. Operating range is -25 C to +55 C and the AD SRE4 has a protection rating of IP 40 for the housing and IP 20 for the terminal blocks.