New through-beam sensor series

June 2004 Sensors & Transducers

The new SM 3000 series is a technologically advanced, self-contained photoelectric sensor line that consists of separate transmitter and receiver sensors that are to be used in through beam mode. The sensors are engineered for the automatic door industry, designed to stop doors from closing prematurely, thus preventing injury to passing pedestrians or damage to the doors themselves. The sensor system, with its sensing range of 6 m high light immunity of 50 000 lux, offers optimal performance and reliable detection in demanding applications.

The sensors are housed in a 12,7 mm cylindrical plastic enclosure with a new one-piece snap-in head, which ensures easy and quick installation. The sensor housing is slim, with its length of 30 mm, allowing installation in narrow door profiles. The sensors are designed with a flat sensor lens, which ensures flush mounting to the surface, thus minimising protrusion. They are fully epoxy encapsulated ensuring an IP67 rating.

Control circuitry, electronics and optical components are all integrated into the sensor housings enabling direct connection to a door controller. The system will run off of a 10 to 30 V d.c. supply voltage, providing a transistor output. No external amplifier or controller unit is required. The transmitter and receiver sensors are available with a 5 m cable connection. Both the transmitter and receiver sensors are protected against reverse polarity of power supplies, control input and output signals. The output of the receiver sensor is also protected against short circuit and inductive loads. The transmitter sensor offers a control input wire, which may be used for either disabling or enabling the transmitter power temporarily for test purpose or as a gradual regulation of the transmitting power level.

For more information contact Telco-Gail Norton Instrumentation, 031 701 4861.

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