v_shortname: Speed monitor, 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: 2x relay (changeover), Transmission direction: to the control, Functions: Start-up bridging, speed monitoring, limit relay, line fault monitoring, Power supply: 20 V ... 90 V DC/48 V ... 253 V AC, 230 V AC, 24 V DC, Power supply connection: Terminals, Connection type: Screw terminals, Housing width: 40 mm, Ambient temperature: -20 ... 60 °C (-4 ... 140 °F)