Safety-implemented circuits must be control reliable as mandated in the U.S. and European standards. Control Reliability is not simple redundancy. There must also be monitoring of the safety circuitry to assure that redundancy is maintained. Monitoring may be achieved by using a safety monitoring relay s that range in function form two-hand palm button control to dual channel input monitoring relays with time -delayed outputs that conform to ANSI B11.19-2003, Section 6.1 for Performance of the Safety Related Function(s).

All Omron Scientific Technologies, Inc. safety relays carry the CE mark and are designed to incorporate three points of safety in their operation to meet both European and U.S. requirements. All safety monitoring relays are UL and C-UL listed.