SCDA127R | SCDA127R/N | SCDA131R/P | SCDA131R/N Safety Relay Module

Product overview

SCDA127R 、SCDA127R/N 、SCDA131R/P 、SCDA131R/N have manual/automatic reset function and are safety relay modules in accordance with ISO 13849-1 category 4.

Input: The safety relay module has three different input wiring configurations, one normally closed, two normally closed or two outputs of the light curtain (SCDA127R connected to  PNP signal, SCDA127R/N connected to  NPN signal, SCDA131R/P connected to PNP signal, SCDA131R/N connected to NPN signal). When connecting with two  normally closed  modes, the  safety  relay  module checks  for  cross-faults  between  the  two  inputs.  When  connected  to  a  light curtain,  the  light  curtain   must  have  the  function  of  performing  cross-fault detection.

Output:  SCDA127R,  SCDA127R/N  safety  relay  modules  have  three  normally open  safety  outputs  and  one   normally  closed  auxiliary  output.  The SCDA131R/P and SCDA131R/N safety relay modules have four normally open safety outputs and two normally closed auxiliary outputs.

The  auxiliary  output  is  a  non-safety  output  designed  to  provide  external signals about the safe output state, the safety output has redundant circuits supporting  safety  functions  and  an  automatic  monitoring  mechanism  that can  remain  active  in  the  event  of a  component failure,  and the safety  relay module can automatically detect whether the contact is properly opened or closed during each duty cycle.

Technical parameters

Product features

Description of wiring diagrams for typical applications