Compact light barriers and special optical systems PANTRON

Transmitter for the Compact Opto Sensor System. The whole system consists of one transmitter and one receiver. No external amplifier is required. The transmitter is all-purpose and the receiver is responsible for range and switching speed.

Two housing types are available: the round type (CLN/CLV) is suitable for wall mounting or a sensor mounting bracket and the rectangular type (LLA) is suitable for mounting on plane surfaces. The STB transmitter allows a range up to 40 m (131 ft).

Technical Specifications

Ordering Information for transmitter

Ordering Information for receiver

This device is used for the detection of intensive, non-uniform light that typically arises by reason of arc welding and laser works of metallic work pieces. This device detects the existence as well as the non-existence of an arc and is made for error detection for automatic manufacturing processes. The system consists of the evaluation device ILD-1000 and the sensor IR-M12VA.

The system reacts to non-uniform (modulated) light in the infrared range. Therefore insensitivity to daylight and artificial ambient light is ensured. The device detects modulated light in frequency range of approximately 50 Hz to 1000 Hz only. The incoming signal is filtered and added up for a specific period of time. If the appropriate value exceeds a predetermined value then the switching output will be activated.

The switching threshold can be set via potentiometer. The period of filtering is 4-fold switchable via a DIP switch. The measuring range is 2-fold switchable for low and high illuminations. Furthermore an impulse stretching of 100 ms for the switching output can be activated via another DIP switch.

An infrared transmitter and a receiver (sensors) is to be connected to the amplifier. The light beam passes the supervised medium. This system operates with modulated infrared light. The transmit power is adjusted automatically for a constant input signal at the receiver. Four measurement ranges resp. measurement modes are available:

Mode 1 - 100% of the overall range correspond to 0-10 V at the analog output. With an offset the 0V threshold can be moved.

Mode 2 - 50% of the overall range correspond to 0-10 V. The measurement range is stretched twice. By the offset, the starting point of the measurement range is fixed to e.g. 20% of transmit power, to even out pollution of the sensor heads. Below 20% the voltage level is 0V, between 20% and 70% the voltage is 0-10 V (corresponding to 50% of the overall measurement range). Above 70% the voltage is always 10 V.

Mode 3 - 25% of the overall range correspond to 0-10 V. The measurement range is stretched fourfold.

Mode 4 - 12,5% of the overall range correspond to 0-10 V. The measurement range is stretched eightfold. In this mode a little change of turbidity achieves the highest change of the output voltage.

The offset is setted by pressing the switch at the front of the device. Alternativly, a setting by the test input is possible. The recent value of turbidity is available at the analog output (0-10V). Additionally, the switching output acts if the voltage level exceeds the adjusted level of the potentiometer (0-10). Like this, a simple fan control can be implemented. The switching output is deactivated if the voltage falls below the adjusted threshold with a hysteresis of approx. 0,2 V.