The Schneider Electric XPSCM1144 is a Preventa XPS CM series safety module designed for monitoring single-beam photoelectric sensors . When used in conjunction with XU2S single-beam safety sensors (periodically tested), it establishes a Type 2 safety light curtain conforming to IEC 61496-1 . This module can monitor up to 4 light beam devices, protecting a zone up to 1200mm high and 8m wide