LDM42P

Laser distance meter with Profibus Interface

Precise, robust and flexible

The LDM42P is an optoelectronic distance measuring device for industrial applications with integrated Profibus DP interface. It works contact-free on the principle of comparative phase measurement (amplitude modulation) and facilitates precisely accurate measurement of distances onto nearly any solid natural surface.

LDM42P

The LDM42P distinguishes itself through high precision as well as high independence from the surface of the measuring object. The red, well visible laser beam allows an easy alignment.
Through the integrated Profibus DP interface it is possible to read in data of several devices into a control easily.

Applications

  • Distance measurement and determination of position
  • Diameter measurement of rolls / coils
  • Fill level measurement
  • Position control
  • Monitoring of safety-relevant parts
  • Monitoring of lifting plants / lifting height measurement and positioning of elevators
  • Monitoring and positioning of cranes and conveyor systems
  • Millimeter precise measurement on various surfaces
  • High range reflector-less distance measurement
  • With additional reflectors on the target object measurements over 100 m
  • Operation in extreme ambient temperatures with high precision and range
  • High supply voltage range between 10 V and 30 V DC with low power consumption
  • Safe operation through laser class 2
  • Easy adjustment through visible laser beam
  • Common flexible interface cable for supply voltage, switching output and analog output
  • Customized parameterization via PC
  • Display of measured values in meters, feet, inches and others due to free scaling
  • Robust, compact housing, easy to install, protection standard IP 65
Measuring range1)

0.2 m ... 30 m on almost all natural surfaces
over 100 m achievable depending on the degree of reflection of surfaces

Measuring uncertainty2,3)

±2 mm under defined measuring conditions
±3 mm (+15 °C ... +30 °C)
±5 mm (-10 °C ... +50 °C)

Resolution

0.5 mm

Reproducability

0.1 mm, freely scalable

Measuring time

0.1 s ... 6 s adjustable or automatically in mode DT
20 ms in mode DX on white surface

Laser class

Laser class 2 acc. to DIN EN 60825-1:2001-11 (650 nm, red)

Laser divergence

0.6 mm

Serial Interface

RS232 , Baud rate 38400, ASCII hex,
setting of measuring functions, scaling, measuring time via commands, display of measured values, internal temperature and error code

Digital output

Programmable switching threshold and hysteresis, "high side" switch, maximum load 0.5 A

Fieldbus interface

Profibus-DP norm slave
12 Mbit, auto detect
16 Byte process data (live counter, distance, error message, error counter, temperature, timestamp)
1 Control byte (measuring mode, trigger, Laser on/off)

Power supply voltage

10 V ... 30 V DC

Power consuption

Ca. 3.5 W
Ca. 28 W with acitve heating

Operating temperature

-10 °C ... +50 °C
-40 °C ... +50 °C with integrated heating

Housing material

Aluminum, powder coated and anodized

Dimensions

198 mm x 96 mm x 50 mm

Weight

800 g

IP Protection class

IP 65

Shock resistance

10 g / 6 ms (DIN ISO 9022-3-31-01-1)

MTBF

30,000 hours at 25 °C

Mounting

4 drill holes for M6 screws, drill pattern 100 mm x 85 mm

Available options

Integrated heating (-h), housing gasket made of Viton® (-v), air pressure regulation unit (-d)

1)Dependent on target reflectance, influence of extraneous light and atmospheric conditions

2)Statistical spread of 95 %

3)Measurement on planar, vertical white surface at standstill or in continuous movement, + 15 °C to +30 °C

4)Dependent on target reflectance, influence of extraneous light and atmospheric conditions

5)At a distance of 10 m the beam diameter is 6 mm, at 100 m it is 6 cm