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BMS/DRM/CAN/COM/LCD port connection
1. Pin definition for BMS
Pin
Pin
BAT_
Definition
TEMP
* The communication port on the lithium battery must be consistent with the definition of
pins 4, 5, 7, and 8 above.
2. Pin definition for DRM
Pin
Pin Definition DRM1/5 DRM2/6 DRM3/7 DRM4/8 +3.3V
* For AS4777 DRM, only PIN6 (DRM0) and PIN1 (DRM1/5) are functional now.
3. Pin definition for CAN
Pin
Pin Definition
485A
4. COM / LCD
4.1 Pin definition for COM / LCD
Pin
1
Pin
Drycontact_
Definition
A (in)
* You can communicate the inverter and external devices through the COM interface.
Professional users can use pins 4 and 5 to realize data acquisition and external control
functions. The communication protocol is modbus RTU.
* When the ShutDown function is enabled, connecting pins 1 and 2 can shut down the
inverter. (Settings <Password 2014> → Advance Settings → ShutDown → Enable)
4.2 Situation of external equipment controlled by the inverter
USB to RS485
converter
1
2
GND
GND
1
2
1
2
485B
VCC
2
Drycontact_
B (in)
Data Read
3
4
BMS_
BMS_
CANH
CANL
3
4
3
4
CANH
CANL
3
4
5
+12V 485A 485B GND
5
6
BMS-
X
485A
5
6
DRM0
(ShutDown)
5
6
GND
6
7
Drycontact_
A (out)
Adapter Box
7
8
BMS_
485B
7
8
GND GND
7
8
SYN1
SYN2
8
Drycontact_
B (out)
67
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