Rotational speed sensor ASD18/4A09KS3GD

magneticexplosion-proof

Speed sensors with integrated control function • 2-wire - a.c. • ATEX certified II 3GD for zone 2;22 • Cable output • General features: These sensors enable the control with extremely high precision the rotation of a toothed wheel or reference marks, switching off the load in case of the speed falls below the minimum threshold. Thanks to the extremely wide measuring range they can be even used to control repetitive operations, signalling in case of unwanted stops. They are able to drive directly a.c. relays from 90 to 240 Vac with no need external power supply or amplifiers. Technical data: • Working voltage: 90 ÷ 240 Vac • Electrical system frequency: 40 ÷ 60 Hz • Off-state current at 220 V: <2,2 mA • Minimum operational current: 8 mA • Voltage drop: <8V • Switching hysteresis (H): <10% Sn • Repeat accuracy (R): <2% Sn • Maximum detectable interval (between two pulses): 2 min • Detectable start-up time (T1): 0 ÷1 min (default 2 sec.) • Temperature range: -25° ÷ +60°C • Max thermal drift of sensing distance Sn: ±10% • Degree of protection: IP67 • Cable conductor cross section: 0,50mm2 • Status indicator: yellow LED = out ON; frequency over the threshold red LED = out OFF; frequency under the threshold blinking red LED = out OFF; short circuit on the output • Marking: II 3D Ex tc IIIC T80°C IP67 X II 3G Ex nAc IIC T6 X • Protected against short-circuit and overload • Electromagnetic compatibility (EMC) according to EN60947-5-2 • According to: EN60079-0/EN60079-15/EN60079-31 • Shock and vibration resistance according to EN60068-2-27/EN60068-2-6 • Class 2 equipment according to EN61140 Use in hazardous area according to instruction manuals