2. BMS1810 Pinouts and Descriptions

On BMS1810 there are connectors for cell connections, temperature sensors, relay outputs, isolated daisy chain communication's bottom connector, digital communication ports, board power, and I/Os. User must arrange the cable connections to any of these connectors by guides and pinouts below.

Danger

Make sure all the connections done correctly and double check the cables. Think twice before plug into any connectors on BMS1810.

Fig.2.1: BMS1810, Board Pinout (TOP)

Fig.2.2: BMS1810, Board Pinout (LEFT)

Fig.2.3: BMS1810, Board Pinout (FRONT)

Fig.2.4: BMS1810, Board Pinout (RIGHT)

Fig.2.5: BMS1810, Board Pinout (BACK)

Table.2.1: Connector No#1, #2, #3, #4 Descriptions

Connector No.	Pin No.	Description (Refer the Fig.2.1 and Fig.2.2)
1 or 2	1	Bottom cell of the battery string. 1st cell's negative tab. (C1-)
1 or 2	2	1st cell's positive tab. (C1+)
1 or 2	3	2nd cell's positive tab. (C2+)
1 or 2	4	3rd cell's positive tab. (C3+)
1 or 2	5	4th cell's positive tab. (C4+)
1 or 2	6	5th cell's positive tab. (C5+)
1 or 2	7	6th cell's positive tab. (C6+)
1 or 2	8	7th cell's positive tab. (C7+)
1 or 2	9	8th cell's positive tab. (C8+)
1 or 2	10	9th cell's positive tab. (C9+)
3 or 4	1	10th cell's positive tab. (C10+)
3 or 4	2	11th cell's positive tab. (C11+)
3 or 4	3	12th cell's positive tab. (C12+)
3 or 4	4	13th cell's positive tab. (C13+)
3 or 4	5	14th cell's positive tab. (C14+)
3 or 4	6	15th cell's positive tab. (C15+)
3 or 4	7	16th cell's positive tab. (C16+)
3 or 4	8	17th cell's positive tab. (C17+)
3 or 4	9	Top cell of the battery string, 18th cell's positive tab. (C18+)

Table.2.2: Connector No#5, #6 Descriptions

Connector No.	Pin No.	Description (Refer the Fig.2.1 and Fig.2.3)
5 or 6	1-2	External Temperature sensor No.1
5 or 6	3-4	External Temperature sensor No.2
5 or 6	5-6	External Temperature sensor No.3
5 or 6	7-8	External Temperature sensor No.4
5 or 6	9-10	External Temperature sensor No.5

Table.2.3: Connector No#7 Descriptions

Connector No.	Pin No.	Description (Refer the Fig.2.1 and Fig.2.5)
7	1	Current Sense Channel - 1 (0-5V)
7	2	Current Sense Channel - 2 (0-5V)
7	3	5V for Current Sensor (Don't use something else)
7	4	+12V Output
7	5	NTC Connection for External Power Path
7	6	Board Ground

Table.2.4: Connector No#8 Descriptions

Connector No.	Pin No.	Description (Refer the Fig.2.1 and Fig.2.5)
8	1 or 3	Isolated daisy-chain communication port (ISO+)
8	2 or 4	Isolated daisy-chain communication port (ISO-)

Table.2.5: Connector No#9 Descriptions

Connector No.	Pin No.	Description (Refer the Fig.2.1 and Fig.2.5)
9	1	Relay 1 Common Pin
9	2	Open Drain Output No.2
9	3	Open Drain Output No.1
9	4	Relay 1 Normally Closed Pin
9	5	Relay 1 Normally Open Pin
9	6	Board Ground

Table.2.6: Connector No#10 Descriptions

Connector No.	Pin No.	Description (Refer the Fig.2.1 and Fig.2.3)
10	1, 2, 3, 4	Board Ground
10	5	+12V Output
10	6	TTL Input - 2 (0-5V)
10	7	TTL Input - 1 (0-5V)
10	8	TTL Output - 2 (Normally 0-5V but may vary on Con.No.6 settings)
10	9	TTL Output - 1 (Normally 0-5V but may vary on Con.No.6 settings)
10	10	External Voltage Source for TTL Outputs

Table.2.7: Connector No#11 Descriptions

Connector No.	Pin No.	Description (Refer the Fig.2.1 and Fig.2.3)
11	1	RS232 No.0 Transmit Data (Service Port)
11	2	RS485 No.2 B Pin
11	3	Board Ground
11	4	RS232 No.0 Receive Data (Service Port)
11	5	RS485 No.2 A Pin
11	6	+12V Output

Table.2.8: Connector No#12 Descriptions

Connector No.	Pin No.	Description (Refer the Fig.2.1 and Fig.2.3)
12	1	RS232 No.1 Transmit Data
12	2	Board Ground
12	3	CAN 2.0b Low Pin
12	4	RS232 No.1 Receive Data
12	5	+12V Output
12	6	CAN 2.0b High Pin

Table.2.9: Connector No#13 Descriptions

Connector No.	Pin No.	Description (Refer the Fig.2.1 and Fig.2.3)
13	1	Board VIN+ Output
13	2	External Led GND Output
13	3	External Button Input
13	4	+12V Output

Table.2.10: Connector No#14 Descriptions

Connector No.	Pin No.	Description (Refer the Fig.2.1 and Fig.2.3)
14	1	Board VIN+ (Board Main Power)
14	2	Board VIN+ Output
14	3	External Button Input
14	4	Board GND (Board Main Power)

Table.2.11: Connector No#15, #16 Descriptions

Connector No.	Pin No.	Description (Refer the Fig.2.1 and Fig.2.3)
15	-	Port for LiBat Extension Board
16	-	TTL Output Voltage Source Setting
TERM	-	Terminate Pin for Isolated Communication

Table.2.12: Connector No#17 Descriptions

Connector No.	Pin No.	Description (Refer the Fig.2.1 and Fig.2.4)
17	1 or 2	Relay 2 Common Pin
17	3	Relay 2 Normally Open Pin
17	4	Relay 2 Normally Closed Pin