Appendix; Glossary - Mennekes ACU Instructions D'installation

6 Appendix

6.1 Glossary

Term Explanation
ACU Accounting Control Unit.
Control device for managing SCUs and for
connecting charging points to a backend.
An ACU can control up to 16 SCUs.
APN Access point name.
Access point to a GPRS mobile phone
network.
Auto Automatic load transfer when using
switch differing charging cables.
Backend Infrastructure for controlling charging
stations and managing personal access
data.
CHAP
Challenge Handshake Authentication
Protocol
Mobile authentication via CHAP
CP Control pilot
Name of the connector contact / cable
through which the communication
information is transmitted.
RS-485 Interface standard for digital data
transmission with high tolerance to
electromagnetic interference.
In this case: Connection between ACU and
up to 16 SCUs.
EDL21 Power meter in the charging station.
meter
FI Residual current device for preventing
short-circuits to earth.
Term Explanation
GPRS General Packet Radio Service.
Packet-oriented service for the transmission
of data over mobile phone networks.
In this case: Wireless connectivity between
ACU and backend.
HCC3 Unit for control of the charging process and
communication with the vehicle (in mode 3
charging)
Charging Power connector at charging station for
point charging the vehicle. A charging station can
have several charging points; each charging
point is controlled by an SCU.
Charging Vehicle-charging unit with charging
station point(s), SCUs, RFID reader and plain-text
display or LED info box.
Load Electronic switch for high electrical power
contactor. with two switching positions.
MCB Circuit breaker
LTE Long Term Evolution
Mobile radio standard for data
transmission.
NTP Network Time Protocol.
Protocol for time and date synchronization
in computer systems.
In this case: Synchronization of time and
date between the ACU and a backend.
OCPP Open Charge Point Protocol
Open communication protocol for charging
stations.
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