v_shortname: Frequency measuring transducer with direction of rotation and slip signal, device offers intrinsically safe circuits for device protection level: Ga , Gb , Gc , Da , Db , Dc , Ma , Mb, device suitable for installation in device protection level: Gc, device offers intrinsically safe circuits for division: Div. 1 , Div. 2, device suitable for installation in division: Div. 2, signal type: binary input, number of channels: 2, field side signal: frequency, field side device: NAMUR sensor, potential-free contact, control side signal: 0/4 ... 20 mA, control side type: relay (changeover), transistor (passive), transmission direction: to the control, functions: start-up bridging, direction of rotation monitoring, speed monitoring, error message output, frequency conversion, synchronization monitoring, limit value relay, line fault monitoring, slip monitoring, supply: 24 V DC, supply connection: terminals or power rail, connection type: screw terminals, housing width: 40 mm, ambient temperature: -20 ... 60 °C (-4 ... 140 °F)