Output function: relay (1 changeover contact per channel) Contact rating: 253 V AC / 2 A / cos phi > 0.7 // 40 V DC / 2 A, resistive load Marking of the unit: ExII (1) G [Ex ia] IIC ExII (1) D [Ex ia] IIIC SKU 4A66Q1YYGINC4V Operating voltage: 24 V DC Protection: IP 20 Product Name: N0533A Ambient temperature: -20...60 °C Shortcode: NV1221/24VDC/RL/1D/1G Approval: PTB 02 ATEX 2036 Connection: terminals up to 2.5 mm² Electrical design: DC