Marking of the unit: ExII (1) G [Ex ia] IIC ExII (1) D [Ex ia] IIIC Operating voltage: 24 V DC Protection: IP 20 Product Name: N0532A Approval: PTB 02 ATEX 2037 TIIS TC16049 IECEx PTB 06.0038 Shortcode: NV1223/24VDC/OK/1D/1G Connection: terminals up to 2.5 mm² Output function: 2 outputs (optocoupler, bipolar, 100 mA, short-circuit protection) SKU Q4EOYU5YMO31CH Electrical design: DC Ambient temperature: -20...60 °C