Came magnetic induction loop detector, 2-channel, 24 V

The Came SMA2 (009SMA2) evaluates two induction loops laid in the road surface. When a metal vehicle stands on or passes over a loop, the detector switches the output relay and sends a signal to the control unit. Use it with barriers, industrial doors and in car parks.

Functions

• Modes – gate, barrier, closed-circuit or direction logic: output 1 switches when passing from loop 1 to loop 2, output 2 the other way round.
• Outputs – 2 relays (max. 240 V AC / 2 A or 30 V DC / 1 A) and an optional fault output.
• Settings – time functions, 9 sensitivity levels, ASB function for trailer drawbars and 4 frequencies so that detectors do not interfere with each other.

Things to bear in mind before installation

• Location – 35 mm DIN rail in a distribution board or enclosure, protection rating IP20.
• Loop – inductance 20–1000 µH, ideally 80–300 µH, loop resistance including feeder below 8 Ω. The site preparation diagram is in the attachment.
• Feeder – twist the wires at least 20 times per metre. With a cross-section of 1.5 mm², max. 100 m (20–40 µH) or 200 m (over 40 µH).

For a mains power supply there is the 230 V version; for one loop, the Came SMA is enough. An alternative is the Nice LP22. Send any questions to eshop@saver.sk; for wiring in the Košice and Prešov regions, see the section.