Sensors & Transducers

Infrared curtain has 79 crossed beams

April 2003 Sensors & Transducers

The SG 09 light curtain series consists of a self-contained transmitter, SGT and a receiver, SGR, intended for both static and dynamic installations.

This series requires a 12-30 V d.c. supply voltage whilst providing a solid state relay output enabling direct connection to a door operator or lift controller. For installations where only an AC supply is available, a 230 or 115 V a.c. power supply unit may be ordered separately.

The receiver is supplied as standard with two cables: one for power and output and the one for connection to the transmitter. The transmitter has one cable for connection to the receiver. The interconnecting cables between the transmitter and receiver are available with 180° DIN plugs for easy installation, or without plugs for direct connection to a screw terminal.

After installation set-up is required. This is achieved by pressing the 'teach in' button located on the front cover of the receiver unit, or by temporarily shortening two wires within the transmitter cable. This feature ensures that the transmitting power level is adjusted for each individual beam according to the application, thus achieving an optimal excess and hysteresis level. Once adjusted, the system will automatically compensate for moderate contamination, ageing of components and misalignment during operation.

The time out feature will allow up to two non-adjacent channels to be ignored if obstructed for more than 60 seconds. If a timed out light beam resumes operation, the time out function will automatically be cancelled 3 seconds after re-establishment.

There are three individual monitor LEDs on the front of the receiver unit. A green LED for power indication; a yellow for output and a red system status LED.

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

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