18 CC612(4G)_D00325_06_M_XXEN/09.2021
Connection
Legend
1
USB interface for Ethernet/WLAN/connection to Master
2
SIM card slot
3
Antenna socket
4
Configuration interface/connection to Slave
5
LEDs for:
• ALARM
• READY (Online connectivity)
• PLC (Power Line Communication)
6
12 V power supply
7
0 V
8
Relay 1 (Control voltage contactor)
9
Relay 1 (Contactor control pin)
10
Connection current transformer
11
Connection to user interface via RJ45 cable
12
Meter connection
13
Plug lock connections
4.2.1 Master/slave connection
The charge controller can function as a data gateway with 4G modem (the dedicated controller is switched
into Master mode) or data gateway without 4G modem. Master/Slave operation can be configured by con-
necting the USB configuration interface of one charge controller (DLM Master) to a USB interface for Ethernet/
WLAN of the second charge controller (DLM Slave) using a USB cable. For each DLM Master/DLM Slave variant,
there are connections common to both (these are described in the following sections) and there are differenc-
es, which are described in „4.2.2 Master device features“ on page 24.
Currently one DLM Slave can connect to the DLM Master. The communication protocol is binary OCPP 1.6.
Essentially the Master controller becomes the OCPP backend for the DLM Slave. The DLM Master exposes each
DLM Slave as an additional connector to the backend.
A charge controller is assigned the Master and Slave role on the
Manufacturer
tab. Each DLM Slave controller
then needs to be assigned the IP address of of the DLM Master as its binary OCPP hostname and needs to use
port 1600 as the binary OCPP port to connect to the DLM Master. Multiple connectivity technologies to con-
nect DLM Master and DLM Slave can be used, for example Ethernet and, where available, WLAN.
i
The configurations such as IP addresses port etc. are generated automatically.
The
Master
is assigned an additional IP address of
192.168.125.124
on the Settings tab without assigning a
standard gateway. The
Slave
uses the IP address
192.168.125.125
to connect to the Master. Using USB as the
connection technology is more cost efficient than using multiple Ethernet cables or WLAN, but limits the dis-
tance of the controllers to a few meters as the maximum length of a USB cable is 5 meters. The DLM Slave
configuration web page (e.g.
http://192.168.123.123
) then offers links to access the Master and the Slave
configuration.
