9
11.2013
Gateway
and connect functional earth.
For L/L1 (50Hz/60Hz to mains): This is the phase of the
network connection. This wire is to be connected with a
pole of the circuit breaker.
For N/L1 (50Hz/60Hz to mains): This is the common
neutral. This wire is to be connected to the neutral of
the inverter and the second pole of the circuit breaker.
6.4 Connect RS485 Bus
For the RS485 connection: Connect the data lines for
A and B respectively, for example to the USB-RS485
Interface Adapter, and also connect the Earth Conductor
and the Cable Shield. The cable shield between each
subscriber should only be connected on one side to
prevent unwanted potential equalization, which could
degrade the communication quality up to impossible
communication.
For connecting multiple gateways:
The AEconversion PLC Gateways are connected to a bus
master (e.g. USB-RS485 Interface Adapter) and the bus
is standardized according to ANSI/TIA/EIA-485-A-9. This
means, for connecting multiple gateways, connect the
A and B of one gateway to the A and B of the next and
so on. The last gateway is then connected respectively
from A and B of the gateway to A and B of the bus
master (here: USB-RS485 Interface Adapter).
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The restrictions to the maximum number of allowable
units in one circuit branch are as follows:
60 Hz
US/60Hz/240V
Installations:
20A Circuit Breaker
US/60Hz/208V
Installations:
20A Circuit Breaker
Type of inverter
Max. number of inverters in one branch
INV250-45 US
13
12
INV350-60 US
10
8
INV350-90 US
10
8
INV500-90 US
6
6
50 Hz
EU/50Hz/230V
Installations:
16A Circuit Breaker
Non-EU/50Hz/230V
Installations:
16A Circuit Breaker
Type of inverter
Max. number of inverters in one branch
INV250-45 EU
12
12
INV350-60 EU
8
8
INV350-90 EU
8
8
INV500-90 EU
6
6
The number of inverters that can be connected to one
gateway are limited in the same way. Therefore, one AC
circuit branch with one Circuit breaker can be connected
to one gateway and each additional circuit needs an
additional gateway. If possible, break down the group
into multiple phases.
Connection Schematic for Gateway:
Connect the AC circuit branch of one inverter group to
L/L1 (Micro Inverter) as the supply line to the gateway