Communication between the battery management system (BMS) and vehicle control unit (VCU) is achieved through the low voltage communication connector located on the battery disconnect unit (BDU) of the Hibernium® battery.
The wire shall be supported 200mm after the plug.
Part Number #
Receptacle: TE 776163-5
Mating Connector: TE 776164-5
Drawing #
Pinout #
Pinout of the connector is shown in the table below.
Controller Area Network (CAN) nodes 1-3 are not terminated inside the BMS.
CAN wire pairs should be Shielded (STP) or Unshielded Twisted Pair (UTP) with 1 twist per inch of wire.
CAN bus termination resistor of 120 Ohm must be present at the two physical end points of the CAN network.
CAN stub length must not exceed 30cm.
| Pinout | Signals Required | Function |
|---|---|---|
| 1 | Not connected | Do not connect |
| 2 | Not connected | Do not connect |
| 3 | Not connected | Do not connect |
| 4 | CAN_3_N | CAN 3 Low – VCU Connection |
| 5 | CAN_3_P | CAN 3 High – VCU Connection |
| 6 | Not connected | Do not connect |
| 7 | HVIL_EXT_OUT_FILT_N | External HVIL return |
| 8 | Not connected | Do not connect |
| 9 | Not connected | Do not connect |
| 10 | Not connected | Do not connect |
| 11 | 12V / 24V | UBAT in from 12/24V Battery (KL30) |
| 12 | 12V / 24V | UBAT in from 12/24V Battery (KL30) |
| 13 | CAN_2_H | CAN 2 High – NC |
| 14 | Not connected | Do not connect |
| 15 | Not connected | Do not connect |
| 16 | Not connected | Do not connect |
| 17 | CAN_1_N | CAN 1 Low – ODOS Connection |
| 18 | HVIL_EXT_OUT_FILT_P | External HVIL out |
| 19 | Not connected | Do not connect |
| 20 | Not connected | Do not connect |
| 21 | Not connected | Do not connect |
| 22 | PMIC_IGNITION_F | KL15 Ignition |
| 23 | 12V / 24V | UBAT in from 12/24V Battery (KL30) |
| 24 | CAN_2_N | CAN 2 Low – NC |
| 25 | Not connected | Do not connect |
| 26 | Not connected | Do not connect |
| 27 | Not connected | Do not connect |
| 28 | Not connected | Do not connect |
| 29 | CAN_1_P | CAN 1 High – ODOS Connection |
| 30 | Not connected | Do not connect |
| 31 | Not connected | Do not connect |
| 32 | Not connected | Do not connect |
| 33 | GND | 12/24V Negative |
| 34 | GND | 12/24V Negative |
| 35 | GND | 12/24V Negative |
CAN nodes 1-3 are not terminated inside the BMS. If the particular BMS CAN node is at the end of the CAN network, a 120 Ohm CAN termination should be fitted within 15cm of the connector on that CAN network.
CAN network “CAN1” is used for connection to the external ‘ODOS’ device. An external 120 Ohm CAN termination should be fitted within 15cm of the communication connector on that CAN network (CAN_1_P [pin 29]/CAN_1_N [pin 17]).
Please note that even if the ODOS device is NOT connected, this termination should be present.
A single 15 Amp fuse should be used in line with 12V/24V (pins 11, 12 and 23).
Communication Harness #
With regards to electromagnetic compatibility (EMC), the communication harness should incorporate a ferrite [Wurth 74271151 (2 turns)] around the power conductors ONLY ( i.e. Pinout 11, 12, 23 & 33, 34, 35).
This ferrite should be located < 100mm from the communication connector.
CAN Network Cabling #
Follow SAE J1939 standard for CAN cabling.
Xerotech recommend the use of Deutsch DT or Amphenol AT series or equivalent series connections.
