Steca coolcept - Page 32

3.6.7 Modbus RTU
The inverter communicates via Modbus RTU with energy meters. The following applies:
n Only energy meter pre-programmed in the inverter can be used.
n The energy meter must be installed in such a way that it records the power fed into the grid.
3.6.8 Modbus RTU data connection cable
NOTICE!
Material damage caused by electrical voltage! The alternative data connection cable may only
be manufactured by technical professionals.
On the inverter side, a 4-pole telephone cable with RJ10 connector may be used as data connection
cable.
4
1
Fig. 10: Contact assignment (= line number) of the RJ10 plug
Device
Connection
Inverter
RJ10
Signal
Contact 1 Data A
2 Data A
3 Ground
4 —
NOTICE!
Danger of destroying the Modbus RTU input of the inverter. Contact 4 of the RJ10 socket of the
inverter carries voltage <20V. Do not use this contact.
EN
747,431 | Z09 | 2015-09-30 32