Technical Description

RFID-Module Connections and wiring
5 Connections and wiring
5.1 EMC and wiring guidelines
5.1.1 Personal safety
Safety extra-low voltage
All operating panels are powered by safety extra-low voltage.
5.1.2 Why EMC-aware wiring?
The immunity of an electrical system depends essentially on wiring and
shielding that is designed to overcome any EMC problems. Servicing
experience has shown that inadequate wiring and shielding is a common
cause of system interference and failure.
Electromagnetic interference is far more troublesome than "conventional"
faults:
l It is not normally recognised as such from the symptoms displayed and
can often be mistaken for a fault in an assembly, which is basically
sound.
l They mainly occur sporadically and are difficult to duplicate.
As a consequence fault-finding is time-consuming and expensive.
Therefore ensure from the start that the wiring and shielding
conforms to the guidelines documented below.
5.1.3 Which EMC measures must be taken?
The EMC measures for the RFID module concentrate on shielding the
coaxial and connecting cable of the RFID module <-> OP 3xx.
5.2 Power supply
The power to the RFID module is supplied via the operating panel (refer to
chapter “XE 020/A module RJ45 socket“).