Image showing ILD-1000


  • Light sensor for detecting arcs
  • Adjustable sensitivity
  • 4 filter time constants
  • Pulse stretching
  • Sensor control
  • Potential-free switching output
  • Alarm output

Product Description

This device is used for the detection of intensive, non-uniform light that typically arises by reason of

  • arc welding
  • 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.

Mode of Operation

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.

Field of applications

  • Robotic welding systems
  • Laser machining
  • Work piece control
  • Submerged arc welding
Application of ILD-1000 with welding robot

Technical Specifications

Supply voltage

24 V DC

Power consumption

2,4 W

Switching output

60 V AC / DC, 100 mA, short-circuit proof

Alarm output

PNP 24 V, 100 mA, short-circuit proof


DIN rail 43880

Housing material

NORYL, light grey

Protection class

IP 20

Dimensions W x H x D

35,8 x 95 x 58 mm

Operating temperature

-25 °C ... +50 °C

Storage temperature

-30 °C ... +80 °C

Ordering Information


Order code

Screw terminal


Plug Connection



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