4.3 Electrical data
Category Compliance Description
Power supply IEEE 802.3af class 0 U
nom
= 48 V DC
(PoE specification)
Protected against short-
circuit and inverse
polarity
Power
interruptions
EN 50155 class S1 Power fail < 10 ms
Power
consumption
approx. 5 W
Grounding
concept
EN 50153
EN 50343
Housing isolated from
power supply and elec-
tronic ground; power
supply isolated from
electronic ground
Housing must be con-
nected to ground poten-
tial for full standard
compliance (using the
ground stud).
Remark about power interruptions: With regard to the use in
trains, the APS-R-PoE will withstand short power interruptions of
approx. 5 ms, which is close to EN 50155 class S2. This behavior
deviates from the PoE specification IEEE 802.3af, which requires
an instant shutdown at low voltage. It is not possible to be com-
pliant to both requirements.
Supply voltage APS-R-PoE
Technical data
Electrical data
09.06.2017 21
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