Steca coolcept StecaGrid 1500, Installation And Operating Instruction

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3.6.4 Alternative RS485 data connection cable
NOTICE!
Material damage caused by electrical voltage! The
alternative data connection cable may only be
manufactured by professional personnel.
The alternative data connection cable is a Cat-5 cable for long data
connections. The following applies to the alternative data
connection cable:
n
The total length of the RS485 bus must not exceed 1,000 m
(Master/first inverter to last inverter).
n
Use the pin assignment according to the table below if the
alternative data connection cable is connected to the RJ45
socket of the first inverter or to the connector of an external
data logger.
Pin assignment of the alternative RS485 data cable
Device Inverter Solar-Log
WEB‘
log 1)
Kiwigrid
Signal
¤
Connect
ion
RJ45
Terminal
strip
RJ12
Terminal
strip
Contact
1 1 2 A Data A
2 4 4 B Data B
3 — — — —
4 — — — —
5 — — — —
6 — — — —
7 — — — —
8 3 6 GND Ground
NOTICE!
1 Danger of destroying the inverter's RS485 input.
Pin 1 of the RJ12 socket of the Web‘log data logger
carries 24 V DC. Never connect the alternative data
connection cable to pin 1!
3.6.5 RS485 termination
To prevent data transmission errors, the start and end of the RS485
bus should be terminated:
EN
747,431 | Z09.2 | 18/02/2016 28