SICK WLG4S - Notes on Electrical Installation

4 Mounting
NOTE
Note the sensor’s maximum permissible tightening torque of < 0,4Nm.
Mounting of photoelectric retro-reflective sensors
Mount the sensor and the reflector using suitable mounting brackets (see the SICK
range of accessories). Align the sensor and reflector with each other.
5 Electrical installation
5.1 Notes on electrical installation
NOTICE
Equipment damage due to incorrect supply voltage!
An incorrect supply voltage may result in damage to the equipment.
■
Only operate the device with safety/protective extra-low voltage (SELV/PELV).
■
The sensor is a device of protection class III.
■
Only operate the device with an LPS (limited power source) in accordance with
IEC62368-1 or an NEC Class 2 power supply unit.
NOTICE
Equipment damage or unpredictable operation due to working with live parts!
Working with live parts may result in unpredictable operation.
■
Only carry out wiring work when the power is off.
■
Only connect and disconnect electrical connections when the power is off.
■
The electrical installation must only be performed by electrically qualified person‐
nel.
■
Standard safety requirements must be observed when working on electrical
systems!
■
Only switch on the supply voltage for the device when the connection tasks have
been completed and the wiring has been thoroughly checked.
■
When using extension cables with open ends, ensure that bare wire ends do not
come into contact with each other (risk of short-circuit when supply voltage is
switched on!). Wires must be properly insulated from each other.
■
Wire cross-sections in the supply cable from the user’s power system must be
selected in accordance with the applicable standards.
NOTE
Layout of data cables
■
Use shielded data cables with twisted-pair wires.
■
Implement proper and complete shielding concept.
■
To avoid interference, e.g., from switching power supplies, motors, clocked regula‐
tors and contactors, always use cables and layouts that are suitable for EMC.
■
Do not lay cables over long distances in parallel with voltage supply cables and
motor cables in cable ducts.
The IP enclosure rating for the device is only achieved under the following conditions:
OPERATING INSTRUCTIONS
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O P E R A T I N G I N S T R U C T I O N S | WLG4S 80282151N09/2024-03-12 | SICK
Subject to change without notice
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