Switching frequency: 3000 Hz Protection: IP 67 Housing materials: PBT Connection: PTFE cable / 0.065 m, 2 x 0.14 mm² Marking of the unit: ExII 1G Ga Ex ia IIC T4 ExII 1D Ex iaD 20 T 125°C Product Name: N7S21A Electrical design: Connection to certified intrinsically safe circuits with the max. values U = 15 V / I = 50 mA / P = 120 mW Ambient temperature: -40...100 °C Output function: Normally closed Nominal voltage: 8.2 DC, (1kΩ) V SKU DTBI1765IRX67H Shortcode: I7S23.5-N /1G/1D