Mennekes ACU Instructions D'installation page 72

Term Explanation
Panel Control panel at the charging station with
power connector and plain-text display or
LED info box.
PAP Password Authentication Protocol
Mobile authentication via PAP
PP Proximity Pilot or Plug Present
Contact for determining the current
carrying capacity of the charging cable and
activating the immobiliser.
PWM
Pulse width modulation.
Method for encoding and transmitting
information over square pulses.
RFID Radio-frequency Identification.
Method for wireless identification of objects
through transponders by a unique
identifier.
In this case: Authentication of users
through a personalised smart card.
SCU Socket Control Unit.
Device for controlling the installed
hardware of a charging station. Each SCU
controls one charging point; one ACU can
manage up to 16 SCUs.
UMTS Universal Mobile Telecommunications
System
Mobile radio standard for data
transmission.
X.509 Encryption standard for generating digital
certificates.
In this case: Standard for certificates to
encrypt connections between the ACU and
a backend.
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