Operating Instructions
LMS5xx
For your safety
8013796/ZM63/2017-05-09 © SICK AG · Germany · All rights reserved · Subject to change without notice 13
Chapter 2
Fig. 1: Laser output aperture on the LMS5xx, here on LMS500
The LMS5xx operates with a infrared-light laser diode. The laser beam cannot be seen with
the human eye.
2.8.2 Electrical installation work
Only authorized, specialist personnel are allowed to perform electrical installation work.
The power supply must be disconnected when attaching and detaching electrical
connections.
Select and implement wire cross-sections and their correct fuse protection in
accordance with the applicable standards.
Do not open the housing.
Observe the current safety regulations when working on electrical systems.
2.8.3 Damaging potential equalization currents due to different ground potentials
For electrical safety, the LMS5xx has been designed and checked according to
IEC 61010-1:2010-06.
The LMS5xx is connected to the peripheral devices (power supply, encoder, PLC/host, if ap-
plicable other LMS5xx, etc.) by using shielded cables. The shield of each cable is connected
to the metal housing of the LMS5xx via the system connector.
If the peripheral devices have metal housings and if the cable shield also is connected to
their housings, it is assumed that all devices involved in the installation have the same
ground potential.
This is achieved for instance by fulfilling the following conditions:
mounting the devices on conductive metal surfaces
correctly grounding the devices/metal surfaces in the system
a low-impedance and stable current carrying equipotential bonding between areas with
different ground potentials, if necessary
If these conditions are not met, e.g. on devices in a widely distributed system over several
buildings, potential equalization currents may, due to different ground potentials, flow along
the cable shields between the devices and may cause danger.
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