32
33
※ 4.6 Meter/RS485/DRED Connection
Figure 4-21
Note
Port 1
Port 2
Port3
Meter Port
RS485 Port
DRED Port
① This port is available on export limitation & control, RS485 and DRED versions of the
inverter only.
② The Pin connector in inverter Port1 and Port2 may vary from 2Pin to 3pin according to
the shipment version.
Inverter communication ports are located at the behind of the COM2 plate at the bottom
and include RS485 port (used for Meter or Datalogger connection), and DRED port, as
shown in Figure 4-21:
4.6.1 Terminals definition
1
1
1
3
5
2
2
3
3
2
4
6
Port 1
Port 2
Port 3
COM2-1
COM2-2
Different versions of the inverter have different terminals, which are defined as follows:
Port
Function
NO.
Definition
Port1
① Only Export limitation & control
version with this port.
② Connect external Meter (with 3CTs)
to activate the Export Limitation &
control function on Sunways STT
series inverter.
1
RS485 A
2
RS485 B
3
PE/NULL
Port 2
① Export limitation & control/RS485/
DRED version with this port.
② ln case of multiple inverters, all the
inverters can be daisy-chained via
RS485 cables.
1
RS485 A
2
RS485 B
3
PE/NULL
Port 3
① Only DRED version with this port.
② DRED means demand response
enable device. The AS/NZS 4777.2:2020
requires inverters to support demand
response mode (DRM). This function
is for inverters that comply with AS/
NZS4777.2:2020 standard.
③ Sunways inverter is fully compliant
with all DRM. The 6pin connector is
used for DRM connection.
④ Support DRM command: DRM0,
DRM5, DRM6, DRM7, DRM8.
1
COM/DRM0
2
REFGEN
3
DRM4/8
4
DRM3/7
5
DRM2/6
6
DRM1/5
STT series three-phase inverter supports multiple inverters daisy-chain connection to a
data logger via RS485 communication.
Multiple inverters connection diagram as shown in Figure 4-22:
4.6.2 RS485 Communication
4 Installation
4 Installation
