2. BCU2002 Pinouts and Descriptions
The BCU2002 stands as a cutting-edge power management device designed for efficiency and adaptability across a range of applications. Its user-friendly design incorporates a wake-up trigger in the form of a user button, complemented by Power and Run/Error status LEDs for intuitive operational feedback. Boasting 1 relay output, 4 high-side switch outputs and 1 user button with an integrated LED, the BCU2002 offers extensive input and output capabilities. The onboard Real-Time Clock (RTC) with a backup battery ensures accurate timekeeping, while its unique daisy-chain slave communication feature, supported by 1.5kV isolated RJ45 interfaces, allows seamless integration with up to 16 slave modules. With the LiBat standard protocols, JSON and Modbus RTU over its isolated CAN bus, RS485 and RS232 service ports, alongside support for 5V external current sensors, the BCU2002 ensures adaptability and precision.
Danger
Check every connection and cable before you plug a connector into the BCU2002.
Table.2.1: Connector No#1 Descriptions
| Connector No. | Pin No. | Description (see Fig.2.1 and Fig.2.4) |
|---|---|---|
| 1 | 1 | Board VIN+ (Board Main Power) |
| 1 | 2 | Board VIN+ Output |
| 1 | 3 | External Button Input |
| 1 | 4 | Board GND (Board Main Power) |
Table.2.2: Connector No#2 Descriptions
| Connector No. | Pin No. | Description (see Fig.2.1 and Fig.2.4) |
|---|---|---|
| 2 | 1 | Board VIN+ Output |
| 2 | 2 | External LED- Output (LED GND) |
| 2 | 3 | Board GND |
| 2 | 4 | External Button Input |
| 2 | 5 | External LED+ Output |
| 2 | 6 | +12V Supply Input (12Vin) |
Table.2.3: Connector No#3, #4 Descriptions
| Connector No. | Pin No. | Description (see Fig.2.1 and Fig.2.4) |
|---|---|---|
| 3 | 1, 2, 3 | ISO GND |
| 3 | 4 | Isolated Input 1 (LiMon INPUT 1) |
| 3 | 5 | Isolated Input 2 (LiMon INPUT 2) |
| 3 | 6 | Isolated Output 1 (LiMon OUT 1) |
| 4 | 1 | CAN 2.0b CH2 High Pin (CAN H-2) |
| 4 | 2 | CAN 2.0b CH2 Low Pin (CAN L-2) |
| 4 | 3 | CAN 2.0b CH1 High Pin (CAN H-1) (default) |
| 4 | 4 | CAN 2.0b CH1 Low Pin (CAN L-1) (default) |
Table.2.4: Connector No#5 Descriptions
| Connector No. | Pin No. | Description (see Fig.2.1 and Fig.2.4) |
|---|---|---|
| 5 | 1 | RS232 No.0 Transmit Data (Service Port) |
| 5 | 2 | RS485 B Pin |
| 5 | 3 | ISO- GND |
| 5 | 4 | RS232 No.0 Receive Data (Service Port) |
| 5 | 5 | RS485 A Pin |
| 5 | 6 | ISO-5V Output |
Table.2.5: Connector No#6, #7, #8, #9, #10 Descriptions
| Connector No. | Pin No. | Description (see Fig.2.1 and Fig.2.3) |
|---|---|---|
| 6 | 1, 2 | High Voltage Measurement Positive Input CH4 (HVIN No#4 Assignment) |
| 7 | 1, 2 | High Voltage Measurement Positive Input CH3 (HVIN No#3 Assignment) |
| 8 | 1, 2 | High Voltage Measurement Positive Input CH2 (HVIN No#2 Assignment) |
| 9 | 1, 2 | High Voltage Measurement Positive Input CH1 (HVIN No#1 Assignment) |
| 10 | 1, 2 | High Voltage Measurement Block Common GND |
Table.2.6: Connector No#11 Descriptions
| Connector No. | Pin No. | Description (see Fig.2.1 and Fig.2.3) |
|---|---|---|
| 11 | 1 | Current Sensor No#2 CH1 Sense Input |
| 11 | 2 | Current Sensor No#2 CH2 Sense Input |
| 11 | 3 | Current Sensor No#2 ISO 5V Output for Sensor Power |
| 11 | 4 | Current Sensor No#2 ISO GND Output for Sensor Power |
Table.2.7: Connector No#12 Descriptions
| Connector No. | Pin No. | Description (see Fig.2.1 and Fig.2.3) |
|---|---|---|
| 12 | - | Current Sensor No#1 Connector (default) |
| 12 | 1 | Current Sensor No#1 CH1 Sense Input |
| 12 | 2 | Current Sensor No#1 CH2 Sense Input |
| 12 | 3 | Current Sensor No#1 ISO 5V Output for Sensor Power |
| 12 | 4 | Current Sensor No#1 ISO GND Output for Sensor Power |
Table.2.8: Connector No#15 Descriptions
| Connector No. | Pin No. | Description (see Fig.2.1 and Fig.2.5) |
|---|---|---|
| 15 | - | Isolated Daisy-Chain Connector No#1 (Standard RJ45) |
| 15 | 1, 2, 3, 4, 7, 8 | Not Connected |
| 15 | 5 | Isolated daisy-chain communication port (ISO-) |
| 15 | 6 | Isolated daisy-chain communication port (ISO+) |
Table.2.9: Connector No#16 Descriptions
| Connector No. | Pin No. | Description (see Fig.2.1 and Fig.2.5) |
|---|---|---|
| 16 | - | Isolated Daisy-Chain Connector No#2 (Standard RJ45, optional) |
| 16 | 1, 2, 3, 4, 7, 8 | Not Connected |
| 16 | 5 | Isolated daisy-chain communication port (ISO-) |
| 16 | 6 | Isolated daisy-chain communication port (ISO+) |
Table.2.10: Connector No#17 Descriptions
| Connector No. | Pin No. | Description (see Fig.2.1 and Fig.2.2) |
|---|---|---|
| 17 | 1, 2, 3, 4, 5 | GND |
| 17 | 6 | High-Side Switch Output (LiMon OUT 5) |
| 17 | 7 | High-Side Switch Output (LiMon OUT 3) |
| 17 | 8 | High-Side Switch Output (LiMon OUT 2) |
| 17 | 9 | High-Side Switch Output (LiMon OUT 4) |
| 17 | 10 | External Supply Input (Vext) |
Table.2.11: Connector No#18 Descriptions
| Connector No. | Pin No. | Description (see Fig.2.1 and Fig.2.2) |
|---|---|---|
| 18 | 1, 2 | Relay Common Pin (LiMon OUT 6) |
| 18 | 3 | Relay Normally Open Pin (LiMon OUT 6) |
| 18 | 4 | Relay Normally Closed Pin (LiMon OUT 6) |
Table.2.12: Connector No#14 Descriptions
| Connector No. | Pin No. | Description (see Fig.2.1) |
|---|---|---|
| 14 | - | Port for LiBat Extension Board |
Table.2.13: Connector No#24 (SW1) Descriptions
| Part | Lever | Description (see Fig.2.1) |
|---|---|---|
| 24 | - | CAN and RS485 Termination Switch: ON puts 120 Ω across the line, only at the two ends of a line |
| 24 | 1 | Lever 1: not used |
| 24 | 2 | Lever 2: RS485 termination, 120 Ω between RS485 A and B (connector 5 pins 5 and 2) |
| 24 | 3 | Lever 3: CAN CH2 termination, 120 Ω between CAN H-2 and CAN L-2 (connector 4 pins 1 and 2), not used by the current firmware |
| 24 | 4 | Lever 4: CAN CH1 termination, 120 Ω between CAN H-1 and CAN L-1 (connector 4 pins 3 and 4) |