Interfaces & Wiring

Safety Information

DO NOT CONNECT MODULE CELL INPUTS ACROSS MID-PACK SWITCHES, CONTACTORS OR SHUNTS

UNPLUG MODULE BATTERY CELL INTERFACES BEFORE BATTERY MAINTENANCE

VERIFY CELL VOLTAGES ON NEW INSTALLATIONS BEFORE CONNECTING TO MODULE

All pinouts are looking into the module, "through" the wire housing.

Isolation & Voltage Rating

The module is designed to provide a 1kV isolation barrier between the Battery Cell Interface J1 and the Power, CAN Interfaces J2/J3.

It is not recommended to connect GND to IGND, as this compromises the isolation barrier.

It is important to verify that other devices on the shared Power, CAN Interface are also isolated from the battery pack.

J1 - Battery Cell Interface

Wiring Considerations - Cell Taps

Correct wire selection is essential for mitigating the risk of cell tap shorts.

MPPE or PTFE insulated 24 to 20 AWG stranded wire is recommended. See Tools & Parts - Battery Cell Interface.

MPPE and PTFE provide good temperature and abrasion resistance.

Cell tap wires must be routed correctly to ensure they do not chafe or rub against any objects that could cause abrasion, and are not near hot surfaces or flammable materials.

It is recommended to keep cell tap wiring away from high current noisy conductors to minimise coupling and ensure good measurement accuracy.

Temperature Sensors

Free hanging, insulated lead, two wire 10K 1% B25/85 3435K NTCs are suitable, such as Vishay NTCLE and NTCA series.

Ensure the correct crimps are used for the specific NTC's wire gauge.

BMS106 Pinout

BMS106 J1 Pinout - Looking into module.

BMS108 Pinout

BMS108 J1 Pinout - Looking into module.

BMS110 Pinout

BMS110 J1 Pinout - Looking into module.

BMS112 Pinout

BMS112 J1 Pinout - Looking into module.

Signal Descriptions - Battery Cell Interface

Pin Name	Description	Notes
CELL0 ... CELL12	Battery Cell Taps	CELL0 is reference potential
NC	No Connect	DO NOT CONNECT
RSVD	Reserved	DO NOT CONNECT
VTEMP1 ... VTEMP2	NTC Inputs
IGND	NTC References

Tools & Parts - Battery Cell Interface

Tool/Part	Manufacturer	Manufacturer Part Number
Header	Wurth Elektronik	66201821022
Receptacle	Wurth Elektronik	662018113322
Wire Crimps (24 to 20 AWG)	Wurth Elektronik	66200113722DEC
Wire Crimps (30 to 26 AWG)	Wurth Elektronik	66200413722DEC
Wire Crimp Tool	Wurth Elektronik	600001
Wire Crimp Die	Wurth Elektronik	600300300001
Wire (or equivalent)	Alpha Wire	6713 OR

J2, J3 - Power, CAN Interface

Power, CAN Interface pinouts are the same between all variants.

Wiring Considerations - Power, CAN Interface

External devices connected to the module's Power, CAN Interface must share a common ground with the module.

Shielded, 4-wire, dual twisted pair, 20 to 24 AWG cable with 120 Ohm characteristic impedance is recommended. See Tools & Parts - Power, CAN Interface.

Shield termination and pass-through are available on the module, it is recommended to only terminate the shield to ground at a single point to avoid ground loops.

Due to the module's connector types an unshielded and untwisted section of the harness is inevitable. It is recommended to keep this section as short as possible.

Unshielded harnesses may work in certain low noise, short run installations, it is the integrator's responsibility to verify performance and integrity of the final wiring configuration.

BMS100 J2 & J3 Pinouts - Looking into module.

Signal Descriptions - Power, CAN Interface

Pin Name	Description	Notes
PWR	Module Power (IN/OUT)	6 - 36VDC
GND	Module Reference	Voltage bus return
CANH	CAN High
CANL	CAN Low
CANL_T	CAN 120R Termination	Connect to CAN Low
SH	Shield Pass-through	Connected between J2/J3
SHGND	Shield Termination	Internally connected to GND

Tools & Parts - Power, CAN Interface

Tool/Part	Manufacturer	Manufacturer Part Number
Header	Wurth Elektronik	66200621022
Receptacle	Wurth Elektronik	662006113322
Wire Crimps	Wurth Elektronik	66200113722DEC
Wire Crimp Tool	Wurth Elektronik	600001
Wire Crimp Die	Wurth Elektronik	600300300001
Cable (or equivalent)	LAPP	2170343