Connection Notes - SICK WLA12L Betriebsanleitung

5.2 Notes on UL approval
5.3

Connection notes

8027709/2022-04-12 | SICK
Subject to change without notice
The electrical installation must only be performed by electrically qualified person‐
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nel.
Standard safety requirements must be observed when working on electrical
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systems!
Only switch on the supply voltage for the device when the connection tasks have
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been completed and the wiring has been thoroughly checked.
When using extension cables with open ends, ensure that bare wire ends do not
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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
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selected in accordance with the applicable standards.
Operation in short-circuit protected network at max. 8 A.
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NOTE
Layout of data cables
Use shielded data cables with twisted-pair wires.
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Implement proper and complete shielding concept.
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To avoid interference, e.g., from switching power supplies, motors, clocked regula‐
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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
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motor cables in cable ducts.
The IP enclosure rating for the device is only achieved under the following conditions:
The cables plugged into the connections are screwed tight.
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If these instructions are not complied with, the IP enclosure rating for the device is not
guaranteed!
The device shall be supplied from an isolating transformer having a secondary overcur‐
rent protective device that complies with UL 248 to be installed in the field rated either:
a) max 5 amps for voltages 0 ~ 20 V (0 ~ 28.3 V peak), or
b) 100 / Vp for voltages of 20 ~ 30 V (28.3 ~ 42.4 V peak).
Alternatively, they can be supplied from a Class 2 power supply.
UL Environmental Rating: Enclosure type 1
Operation in standard I/O mode:
– Male connector connection: Pin assignment
– Cable: Wire color
Only apply voltage and switch on the voltage supply once all electrical connections have
been established.
Operation in IO-Link mode: Connect the device to a suitable IO-Link Master. Integrate
into the master or into the controller using IODD/function block. The green LED flashes
on the sensor. IODD and function block are available to download from
under the part number.
Explanation of the connection terminology used in the following tables:
• BN = brown
• WH = white
•
BU = blue
OPERATING INSTRUCTIONS
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