LDM 41/42 P

时间:2013-01-12 09:26

LDM 41/42 P 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.

LDM 41/42 P Applications

Supervision of crane and conveyors

Distance and position measurement


Supervision of security-relevant parts

Supervision of lift systems / lift level measurement / elevator positioning

Positioning control

Diameter measurement of coils

LDM 41/42 P Characteristics

Millimeter precise measurement at various surfaces (LDM 42 P only for white surface)

1 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, decimetre, centimetre, 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 byte

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