LDM 41/42 P - Laser Distance Measurement Sensor
 Theory of Operation
The LDM 41/42 P Laser Distance Measurement Sensor with Profibus DP interface is designed for
distance measurement applications in an industrial environment. The LDM 41/42 P works based on
comparative phase measurement. To achieve this, it emits a visible Laser beam with different
modulation frequencies. The target being measured returns diffusely reflected light that is
subsequently compared with a reference signal. Finally, a microprocessor uses the recorded phase
shift to calculate a required distance with mm accuracy.
The sensor LDM 41 P distinguishes itself through a high precision as well as a big independence of
the surface of the measured object. The LDM 42 P is design for fast measurement on a white target.
The red, well visible Laser beam allows a simple alignment.
 
Applications
- Supervision of crane and conveyors
- Distance and position measurement
- Level-measurement
- Supervision of security-relevant parts
- Supervision of lift systems / lift level measurement / elevator positioning
- Positioning control
- Diameter measurement of coils
Software Download
LDMTool Version 4.5 for Windows 2000/XP/Vista; easy start up and configuration for all devices of the LDM-Seriesincl. graphic display, 60 days demo version (configuration function runs without time limitation)
Note: For Windows7 64 Bit please use compatibility mode (windows7_64bit.pdf). |
Characteristics
- Millimeter precise measurement at various surfaces (LDM 42 P only for white surface)
- Long range reflector-less distance measurement, with additional reflectors mounted onto target
over 100 m
- High availability under outdoor temperature conditions with high precision
- Big supply voltage range 10 V until 30 V DC
- Safe use because of Laser Class 2
- Simple alignment with a visible Laser beam
- RS 232 data interface for programming
- Simple parameter setup with a PC or laptop
- Measured values are displayed in meters, decimeters, centimeters, feet, inch... and different
resolutions due to free scaling
- Stable and easy to install enclosure with protection grade of IP 65
- Direct connection to Profibus DP
- Setup of measurement mode, inside temperature measurement, switch-off Laser (Stand-by)
controlled by Profibus control bytes.
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