8
RS485-2 COMMUNICATION INTERFACE DEFINITION:
DRY CONTACT DESCRIPTION
INTERFACE
DEFINED DECLARATION
DEFINED DECLARATION
Battery
link ports
A part
RS-485-2
Interface
PIN 1
RS485-B2
B part
RS-485-2
Interface
PIN 1
RS485-B2
PIN 2
RS485-A2
PIN 2
RS485-A2
PIN 3
RS485-GND
PIN 3
RS485-GND
PIN 4
NC (empty)
PIN 4
NC (empty)
PIN 5
NC (empty)
PIN 5
NC (empty)
PIN 6
RS485-GND
PIN 6
RS485-GND
PIN 7
RS485-A2
PIN 7
RS485-A2
PIN 8
RS485-B2
PIN 8
RS485-B2
This BMS can provide one channel of dry contact signal, all dry contact signals are passive switch-
es, regardless of polarity.
DRY CONTACT
KRY 1 (2P terminal)
BMS STATE
DESCRIPTION
REMARK
Normal Operation
1/2 pin is disconnected
BMS Alarm
1/2 pin is connected
Output when SOC alarm,
under voltage and over
voltage alarm and BMS
protection state, such as
under voltage protection,
over voltage protection or
short circuit protection;