2. Установка и подключение

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Installation and connection

Порядок установки

Место установки устройства BMS Logic 12 должно быть защищено от попадания механических объектов (пыли, грязи, крупных объектов) и воды. Устройства BMS Logic 12 рекомендуется располагать вблизи ячеек, которые они контролируют, но вдали от цепей высокого тока для уменьшения наводок на измерительные цепи и увеличения общей надёжности батарейной системы.

Место установки должно предполагать удобный доступ к устройству для его последующего подключения.

Устройство BMS Logic 12 поставляется в сборе с радиатором для рассеивания тепла, выделяющегося при балансировке ячеек. При использовании устройства в закрытых корпусах необходимо обеспечить съём тепла с радиатора, в противном случае это может привести к повреждению устройства.

Габаритные и установочные размеры приводятся на рисунке ниже.

Parameter	Value
Overall dimensions (length × width × height), mm	139 × 126 × 16
Mounting dimensions (length × width), mm	123 × 118
Mounting holes	M4
Headers X1-X4 type	Molex series Micro-Fit

Headers

The BMS Logic 12 is designed to measure temperature and voltage of 12 battery cells.

Attention!
All headers are shown from the device side!

X1 – header for cells

Pin	Name	Description
1	V-	Minus of the cell stack
2	C2	Cell #2
3	C4	Cell #4
4	C6	Cell #6
5	C8	Cell #8
6	C10	Cell #10
7	C12	Cell #12 (maximum potential of the cell stack)
8	-	-
9	C1	Cell #1 (minimum potential with respect to V-)
10	C3	Cell #3
11	C5	Cell #5
12	C7	Cell #7
13	C9	Cell #9
14	C11	Cell #11

X2 – header for temperature sensors

Pin	Name	Description
1	TEMPG12	Ground of the thermistor #12
2	TEMPG11	Ground of the thermistor #11
3	TEMPG10	Ground of the thermistor #10
4	TEMPG9	Ground of the thermistor #9
5	TEMPG8	Ground of the thermistor #8
6	TEMPG7	Ground of the thermistor #7
7	TEMPG6	Ground of the thermistor #6
8	TEMPG5	Ground of the thermistor #5
9	TEMPG4	Ground of the thermistor #4
10	TEMPG3	Ground of the thermistor #3
11	TEMPG2	Ground of the thermistor #2
12	TEMPG1	Ground of the thermistor #1
13	TEMP12	Signal from the thermistor #12
14	TEMP11	Signal from the thermistor #11
15	TEMP10	Signal from the thermistor #10
16	TEMP9	Signal from the thermistor #9
17	TEMP8	Signal from the thermistor #8
18	TEMP7	Signal from the thermistor #7
19	TEMP6	Signal from the thermistor #6
20	TEMP5	Signal from the thermistor #5
21	TEMP4	Signal from the thermistor #4
22	TEMP3	Signal from the thermistor #3
23	TEMP2	Signal from the thermistor #2
24	TEMP1	Signal from the thermistor #1

X3, X4 – headers for communication with BMS Main

Pin	Name	Description
1	RS485_A	RS-485 line A for communication with the BMS Main
2	RS485_B	RS-485 line B for communication with the BMS Main
3	+5V	Supply voltage 5V
4	GND	Ground

Switches and indicators

SWD1 – address switch

Switch number	Description
1	The first (the lowest) bit of the address. Position ON - bit is 1
2	The second bit is the address. Position ON - bit is 1
3	The third bit of the address. Position ON - bit is 1
4	The fourth bit of the address. Position ON - bit is 1
5	The fifth (the highest) bit of the address. Position ON - bit is 1

Note: There is no SWD1 switch in the recent revisions of the BMS Logic 12. The device address must be configured in the settings (see the section Configuration).

SWD2 – RS-485 termination resistor switch

To connect the termination resistor between the RS485_A and RS485_B lines, switch the SWD2 to the ON position.

Note: There is no SWD2 switch in the recent revisions of the BMS Logic 12. Connect a 120 Ohm termination resistor directly to the X4 connector between the lines RS485_A and RS485_B.

DS1 – mode indicator

State	Description
Blinking	Connection between the BMS Main and the device is established
Short flashing (~50 milliseconds in a second)	The device is measuring voltage and temperature. No communication between the BMS Main and the device
Long flashing (1 second in a 2 second period)	The device is in the bootloader mode

Connection procedure

Connection to BMS Main

To connect the BMS Main to BMS Logic 12 do the following steps:

Connect the BMS Main to the first BMS Logic 12 (P15 -> X3).
Connect the BMS Logic 12 to each other (X4 -> X3).
Switch SWD2 on the last BMS Logic 12 to the ON position or connect a 120 Ohm termination resistor directly to the X4 connector of the last BMS Logic 12.

Recommendations:
1. The total cable length (the sum of the lengths of all cables) between the BMS Main and the last BMS Logic 12 should not exceed 500 meters.
2. Make all connections with the same cable.
3. For a total cable length of more than 10 meters use twisted pair with the 120 Ohm wave impedance.

Connecting battery cells

To connect the battery cells, follow Figure 16. Incorrect connection of the cells can damage the BMS Logic 12.

Begin the connection with the negative of the battery: the "V-" of the first BMS Logic 12 is connected to "B-", then the first cell (C1) of the battery is connected, then the second (C2), etc. The “V-“ of the next BMS Logic 12 is connected to the C12 of the previous BMS Logic 12. If not all inputs of the cells are used, then the remaining inputs are connected to the cell with the highest potential.

Attention!
Connect the battery according to the diagram, otherwise the device may be damaged.

Connecting thermistors

Thermistors should be fastened to the cells, excluding short circuits to the cell terminals (for example, isolate thermistors with heat shrink). For reliable operation, it is recommended to use all thermistors (a temperature sensor per cell).