4.3
Wiring rules
When wiring, use cables with the following AWG* categories or cross sections.
Wiring rules for ...
Spring-loaded terminals
connectable cable cross sec‐
tions for flexible cables ...
without wire end ferrule
0.75 - 2.5 mm
2
AWG: 20 - 14
with wire end ferrule**
0.75 - 2.5 mm
2
AWG: 20 - 14
with TWIN wire end ferrule**
0.75 - 1 mm
2
AWG: 20 - 18
Stripped length of the cable
8 - 10 mm
Wire end ferrule according to DIN 46228 with plastic ferrule**
8 - 10 mm
* AWG: American Wire Gauge
** See note "Wire end ferrules"
Note
Wire end ferrules
Use crimp shapes with smooth surfaces, such as provided by square and trapeze shaped crimp
cross sections.
Crimp shapes with wave-shaped profile are unsuitable.
4.4
24 VDC power supply
CAUTION
Overvoltage protection for the power supply cables
If SCALANCE XR-100WGs are supplied over long 24 V power supply lines or networks, measures
are necessary to prevent interference by strong electromagnetic pulses on the supply lines.
These can result, for example, due to lightning or switching of large inductive loads.
One of the tests used to attest the immunity of the SCALANCE XR-100WG to electromagnetic
interference is the "surge immunity test" according to EN 61000-4-5. This test requires
overvoltage protection for the power supply lines. The following type is, for example, suitable:
Dehn Blitzductor BVT AVD 24, order number 918 422
Manufacturer: DEHN + SÖHNE GmbH + Co. KG, Hans Dehn Str. 1, Postfach 1640, D-92306
Neumarkt, Germany.
Connecting up
4.4 24 VDC power supply
SCALANCE XR-100WG
Operating Instructions, 09/2020, C79000-G8976-C455-04
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