Nuvation Energy High-Voltage BMS, Installation Manual, Page: 13 / 46

Pin Connection Description Connected to Device
7 GPI_ISO2_K Input detector 2 External Equipment
8 GPI_ISO3_K Input detector 3 External Equipment
3.3.6. Stack Bus
The Stack Bus connector accepts power and provides a communication channel from the Power
Interface. The Stack Bus provides 42 mA to the Stack Controller plus the summation of current
consumed by all Cell Interface modules in the system (25 mA per CI-12 or 31 mA per CI-16). 120 Ω
termination must be added by connecting pins 1 and 4 together with a short length of wire (see
Table
12 ).
Connect the Power Interface module to this connector.
Table 11. Stack Bus: Molex MiniFit Jr Connector
Molex 39-01-2065
Manufacturer Molex Incorporated
Housing 39-01-2065
Housing material Nylon UL94V-0
Circuits 6
Crimp terminal 39-00-0181
Wire gauge range AWG20-24 stranded
Table 12. Stack Bus Connector Pin Assignment
Pin Connection Description Connected to Device
1 TERM1 Termination Resistor; Short to Pin 4 to add
120
Ω bus termination
Stack Bus Connector
2 STACKBUS_N Stack bus differential pair negative Power Interface
3 +VSYS +24V Power Supply Power Interface
4 TERM2 Termination Resistor; Short to Pin 1 to add
120
Ω bus termination
Stack Bus Connector
5 STACKBUS_P Stack bus differential pair positive Power Interface
6 COM Power return from SC Power Interface
Nuvation Energy High-Voltage BMS - Installation Guide
Document ID: NE-IG-001 10 Rev 2.1, 2020-03-13