Logismarket, the Industrial Directory.

This robust unit is designed to give consistent and reliable operation when used in the most demanding of environments such as the conditions encountered in mines and quarries.  These units are used in pairs, one on each side of the conveyor to be protected at those points where mis-alignment is likely to occur. The unit is equipped with a switch which is activated when mis-alignment of the conveyor occurs and thus the conveyor can be stopped before the conveyor or the associated rollers are damaged.

Construction
The switch and associated terminals are mounted in a weatherproof plastic moulded enclosure which is fitted with two CM20 20mm cable glands.  The plastic enclosure is mounted on a steel channel which carries the actuating arm.  When the unit detects mis-alignment, the actuating arm rotates 90° to a horizontal position allowing it to be seen from along the conveyor.

Certification
The Belt Alignment Switch is certified intrinsically safe to the CENELEC standard EN50 020 category EEx ia I, the certificate number is SCS Ex 98D2262.  The switch contacts can be used to switch an intrinsically safe circuit with the following characteristics: Umax = 50 volts; Imax = 100mA.