Came magnetic induction loop detector, 1-channel, 24 V

The Came SMA (009SMA) detects a metal vehicle above an induction loop laid in the road surface and switches the output relay. Use it with barriers, industrial doors and in car parks, for example for automatic opening.

Functions

• Modes – gate, barrier or closed-circuit (the relay drops out when the loop is occupied).
• Time functions – delayed make or break, pulse on entry or exit, max. presence time.
• Sensitivity – 9 levels; the ASB function also helps detect trailer drawbars.
• Frequency – 4 frequencies so that several detectors do not interfere with each other.

Things to bear in mind before installation

• Location – the detector goes on a 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.
• 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).
• With a barrier – site preparation diagram in the attachment: loop 1,500 × 700 mm, slots 6 × 50 mm, at least 2,500 mm from the boom.

For two loops, choose the Came 2-channel detector; for 230 V mains, the 230 V version. An alternative is the Nice LP21. Send any questions to eshop@saver.sk; for wiring in the Košice and Prešov regions, see the section.