| Introduction to the Wallbox eM4 Twin
16
Forming charging groups and network topologies
The Wallbox eM4 Twin offers several interfaces for internal communication in a charging group as well as for exter-
nal communication with a backend. Here, a distinction is made depending on the wallbox variant:
Controller / Con:
The Controller wallbox can be operated either individually or as a charging group to-
gether with one or more Extender wallboxes. Internal communication within the charging group can be set up via
WLAN or LAN. For external communication with a backend, you can use the Controller’s WLAN or LAN interface
or LTE USB stick.
Extender / E:
The Extender wallboxes can be operated either individually (stand-alone) or as a charging
group together with a Controller. Internal communication within the charging group can be set up via WLAN
or LAN.
WARNING!
Integration into an existing network infrastructure
If you want to use an existing network infrastructure for communication within a charging group and/or with a
backend, you will need to contact an IT administrator in advance to plan the integration.
The interfaces of the Wallbox eM4 Twin can be used to connect a charging group to a backend. The following combi-
nations are possible:
Controller–backend communication
Controller–Extender communication
WLAN
LAN
LTE
WLAN
LAN
NOTE
Information for network communication
The following ports must be available for communication with the Internet (Controller–backend):
HTTP: 80 / HTTPS: 443 / NTP: 123 / OCPP: 7890
The following ports must be available for communication within the network (Controller–Extender):
DNS: 53 / mDNS: 5353 / UDP/TCP: 68, 1024, 4332, 5432, 11010
• The network must assign each wallbox its own IP address (e.g. via DHCP).
The network interfaces are presented below in detail and illustrated with the help of illustrations in practical use.
Further practical examples of the different possibilities for network communication are available via the link below.
