NOTICE
Failure of the data traffic due to contamination of optical plug-in connections
Optical sockets and plugs are sensitive to contamination of the end face. Contamination can
lead to the failure of the optical transmission network. Take the following precautions to avoid
functional impairments:
• Clean the end face of field-assembled connectors carefully before connecting. No residues
of processing may remain on the connector.
• Only remove the dust caps of optical transceivers and pre-configured cables shortly before
connecting the cables.
• Close unused optical sockets and plugs as well as pluggable transceivers and slots with the
supplied protective caps.
6.3
Wiring rules
When wiring use cables with the following AWG categories or cross sections.
Wiring rules for ...
Screw/spring-loaded ter‐
minals
connectable cable cross sec‐
tions for flexible cables ...
without wire end ferrule
0.25 - 2.5 mm
2
AWG: 24 - 13
with wire end ferrule with plastic fer‐
rule**
0.25 - 2.5 mm
2
AWG: 24 - 13
with wire end ferrule without plastic
ferrule**
0.25 - 2.5 mm
2
AWG: 24 - 13
with TWIN wire end ferrule**
0.5 - 1 mm
2
AWG: 20 - 17
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.
Connecting up
6.3 Wiring rules
SCALANCE XR-300M PoE
50
Compact Operating Instructions, 03/2022, A5E02661178-15
