Rs485 Bus - Mennekes AMTRON Xtra Installation Manual

5.4.6 RS485 bus

If a higher-level back-end system (e.g. MENNEKES E-
Mobility Control Panel) should control the charging process,
the charging station must be connected to a MENNEKES
ACU over RS485 bus. The bus cable is connected to the HC
controller with a connector.
Fig. 17: Connecting the RS485 bus
1 HC controller
2 Plug strip for RS485 bus
3 Plug
Terminal Description
1 (C) Reference level (shielding, see note!)
2 (B) Bus signal B
3 (A) Bus signal A
To avoid balancing currents, the shielding of the bus
cable may be earthed only on one side. This is usually
done at the ACU or E-Mobility Control Panel.
Connect the RS485 bus:
1. Route the control line into the charging station.
2. Strip the bus line and bare the shielding.
3. Connect the shielding to the terminal 1 of the plug.
4. Connect the single cores to terminals 2 and 3 (e.g. for
Siemens Profibus communication: green wire to
terminal 3, red wire to terminal 2).
MENNEKES recommends the following cables for the RS485
bus:
 For installation in the ground: Siemens PROFIBUS line,
underground cable 6XV1830-3FH10 (manufacturer EAN
4019169400428).
 For installation without mechanical stress: Siemens
PROFIBUS line 6XV1830-0EH10 (manufacturer EAN
4019169400312).
When using the recommended cables, trouble free
operation at bus lengths up to 300 metres can be expected.
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