Drm Connection/ Logic Interface Connection - CanadianSolar CSI-25K-T220GL03-E Installation And Operation Manual

4. Comm. & Monitoring
4.1.3 Power Line Communication (PLC) Option
PLC communication is an optional function of this inverter series. For inverters ordered with
PLC function, a PLC STA module will be integrated inside the inverter which will generate
PLC signals onto the AC cables. A separate device (PLC CCO) will be provided to customers
for receiving the PLC signals from the main AC cables and converting to RS485 signals.
PLC communication does not require extra communication cables. Please refer to the PLC
CCO manual for details.
NOTE:
The PLC communication can not work with RS485 communication at the
same time. If already installed the PLC CCO for PLC communication on site,
then the RS485 ports on the inverters can not be used to connect another
monitoring/control device.
Inverter
PV Strings
PV Strings Inverter
PV Strings Inverter
PV Strings Inverter
Figure . Multiple inverter monitoring system 4 8
.30.
PLC CCO Datalogger
Transformer Grid
DC
AC
RS485
PLC
(PLC)
4. Comm. & Monitoring

4.2 DRM Connection/ Logic Interface Connection

The AS/NZS 4777.2:2015 requires inverters to support demand response modes (DRM).
Canadian Solar Australian version inverters fully comply with the DRM requirements in
AS/NZS 4777.2:2015. The pin definition is showing below. For details on the working logic,
please refer to the standard document of AS/NZS 4777.2:2015. The DRM controlling device
is not in the scope of supply of Canadian Solar.
Some European countries may require a simply logic interface relay or contactor switch to
operate the RUN/STOP of inverters. For Canadian Solar European version inverters,
the Pin 13 and Pin 14 can be used to perform the control logic (Not available in South Africa).
The logic interface relay or contactor switch is not in the scope of supply of Canadian Solar.
When the relay is closed (Short between Pin13 and Pin14), the inverter can operate normally.
When the relay is opened (Open between Pin13 and Pin14), the inverter will reduce its output
power to zero within 5s.
After wiring connection of DRM or Logic interface, please refer to section 7.5.8.1 to enable
the DRM/Logic interface function..
Pin Definition Pin Definition
9 DRM1/5 13 RefGen
10
DRM 2/6 14 Com/DRM0
DRM 3/7 V+, 12V
11 15
12 DRM 4/8 16 V-, GND
Figure 4.9
Pin Definition
13 RefGen
14 Com/DRM0
Figure 4.10
.31.