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JK-BMS display port

Since hardware version 10 the JK-BMS comes with a display port. The port can be used to turn the BMS on (short press = 1s) and off (long press = 3s).

Connector and pinout

Model Connector type
JK-BD4A17S4P No display port
JK-BD6A17S6P 6 Pin, Micro JST 1.25mm pitch(?) or Micro JST GH 1.25mm pitch
JK-BD6A17S8P 6 Pin, Micro JST 1.25mm pitch(?) or Micro JST GH 1.25mm pitch
JK-BD6A20S6P 6 Pin, Micro JST 1.25mm pitch(?) or Micro JST GH 1.25mm pitch
JK-BD6A20S8P 6 Pin, Micro JST 1.25mm pitch(?) or Micro JST GH 1.25mm pitch
JK-BD6A24S6P 6 Pin, Micro JST 1.25mm pitch(?) or Micro JST GH 1.25mm pitch
JK-BD6A24S8P 6 Pin, Micro JST 1.25mm pitch(?) or Micro JST GH 1.25mm pitch
JK-B1A8S20P 6 Pin, Micro JST 1.25mm pitch(?) or Micro JST GH 1.25mm pitch
JK-B2A8S20P 6 Pin, Micro JST 1.25mm pitch(?) or Micro JST GH 1.25mm pitch
JK-BD6A20S10P 6 Pin, Micro JST GH 1.25mm pitch
JK-BD6A24S10P 6 Pin, Micro JST GH 1.25mm pitch
JK-B1A20S15P 6 Pin, Micro JST GH 1.25mm pitch
JK-B1A24S15P 6 Pin, Micro JST GH 1.25mm pitch
JK-B2A24S15P 6 Pin, Micro JST GH 1.25mm pitch
JK-B2A24S20P 6 Pin, Micro JST GH 1.25mm pitch 
# JK-BD6AxxSxP

│                 JK-BD6AxxSxP                    │
│                                                 │
│                     RS485              Display  │
└────────────────────[oooo]─────────────[oooooo]──┘
                                         ││
                                         ││
                                         │└─── K+
                                         └──── K-


# JK-B2A8S20P

│                   JK-B2A8S20P                   │
│                                                 │
│   Temp           RS485   Display    Balancer    │
└──[oooo]──[ooo]──[oooo]──[oooooo]──[oooooooooo]──┘
                               ││
                               ││
                               │└─── K-
                               └──── K+


# JK-BD6A2xS10P, JK-BxA24SxxP

│           JK-BD6A2xS10P, JK-BxA24SxxP           │
│                                                 │
│     CAN   RS485    Display      Heat            │
└────[ooo]─[oooo]───[oooooo]───[ooooooo]──────────┘
                     ││││││
                     │││││└─ VCC
                     ││││└── A
                     │││└─── B
                     ││└──── GND
                     │└───── K+
                     └────── K-

Schematics


K-   o-------[ 100kΩ ]-----o  /
                             /---|
K+   o---------------------o/

References