EN
21
Installation Instructions
Dynamic Load Management (DLM) for GLB-Wallboxes in group
To activate DLM for a group of GLB-Wallboxes, a GARO Modbus energy meter must be installed in
the supply distribution box.
It is also possible to install a 2nd Modbus energy meter when you need to measure the consumed
energy at more than one place.
The following energy meters are approved:
• GNM1D-RS485
• GNM3D-RS485
• GNM3T-RS485 (current transformer 3-phase. Max current is based installed current transformer)
• CG EM 112
• CG EM 270
• CG EM 271
For use in systems with local electricity produktion (solar-, wind etc)
• GNM3D-LP RS485
• GNM3T-LP RS485N (current transformer 3-phase. Max current is based installed current
transformer)
Note the energy meter’s Modbus address must be set to 100 and (101 for the 2nd energy meter).
The energy meter continually measures the total energy consumption for each phase. Data is
transmitted to the first wallbox (GLB Master), which controls the charging current per phase for the
entire system in order to prevent the main fuses from tripping. When using a single-phase energy meter,
the meter must be set to the same phase as all of the wallboxes.
A maximum of 32 GLB-Wallboxes may be connected by a shielded twisted pair cable, which is
connected to the GLB-Wallbox connection terminal labelled ‘Data Link’.
DataLink
E-Meter
Remote control
A -
B +
A -
B +
(figure 18)
