v_shortname: Speed monitor, device offers intrinsically safe circuits for equipment protection level: Ga , Gb , Gc , Da , Db , Dc , Ma , Mb, device suitable for mounting in equipment protection level: Gc, device offers intrinsically safe circuits for division: Div. 1 , Div. 2, device suitable for mounting in division: Div. 2, Safety Integrity Level: SIL 2, Signal type: Binary input, Number of channels: 1, Field side signal: Frequency, Field side device: NAMUR sensor, potential-free contact, Control side type: Relay (changeover), Transmission direction: to the control, Functions: Start-up bridging, speed monitoring, error message output, limit value relay, line fault monitoring, Power supply: 230 V AC, Power supply connection: Terminals, Connection type: Screw terminals, Housing width: 40 mm, Ambient temperature: -20 ... 60 °C (-4 ... 140 °F)