The 56.OW69.1200N safety relays with force-guided contacts are the core components for safety devices and are indispensable when designing safety circuits. Safety devises are designed to protect both operator and machine as demanded in OSHA CFR 1910 regulations, "General Requirements for All Machinery". This is a mandatory requirement of the European Machinery Directive EMD 89/392 EEC. DOLD safety relays are approved for use in safety applications to IEC 60204, EN 60204, DIN/VDE 0113 as used in Emergency Stop, Safety Gate, 2-Hand Safety, Light Curtains, Safety Mats, etc.