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737.096 | 11.37
3.4 Data communication
3.4.1 Overview
In order to provide an easy overview of the system functions, voltage, current,
solar generator output, grid frequency and grid voltage, among other values, are
measured within the inverter. The energy yields are also stored on a daily, monthly
and annual basis.
The underside of the inverter has a slot for interface cards. By default, the inverter
is supplied with an RS485 card that has two RJ45 sockets for connection.
An optional display (StecaGrid Vision) can use this RS485 interface to display vari-
ous measurements and the operating status of the inverter. StecaGrid Vision al-
lows complete, integrated monitoring of the solar power system. Further infor-
mation, etc. about installation and commissioning can be found in the separate
operating instructions.
The data protocol used by the inverter is supported by Meteocontrol WEB‘log and
by Solar-Log from Solare Datensysteme. These external data loggers can read vari-
ous measurements and operating states from the inverters. Steca recommends
these systems for professional system monitoring.
3.4.2 Wiring
Caution
Danger of material damage caused by electrical voltage.
X
The alternative data cable may only be manufactured by professional person-
nel.
Cable connection diagram
RS485
RS485
RS485
1
2
3
4
1
StecaGrid Vision or external data logger (e.g. WEB‘log, Solar-Log)
2
First inverter
3
Inverter
4
Last inverter, terminated
Cabling using the supplied data cable
• Data cable:
–
A data cable is supplied with each inverter (1.5 m long, RJ45 plug with
push-pull locking mechanism).
–
The data cables supplied can be used for connecting all the inverters to
the StecaGrid Vision when the devices are mounted close enough to each
other. An alternative data cable must be used for connecting a remotely
mounted StecaGrid Vision or external data loggers.
• Device connections:
–
StecaGrid Vision: 1x RJ45 (additional 1x COMBICON for alternative data
cable)
–
Inverter: 2x RJ45 (identical, can be used as desired)
