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Wiki source code of 2. Installation and connection

Version 18.1 by Admin on 2025/01/13 13:07
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1 (% data-numbered-headings-start="2" style="--numbered-headings-start: 1;font-size: 0px;color: rgba(0, 0, 0, 0.0);margin-bottom: 0px; margin-top: 0px;" %)
2 = nstallation and connection =
3
4 == Installation procedure ==
5
6 The mounting area of the BMS Logic 12 must be protected from mechanical particles (dust, dirt, large objects) and water. The BMS Logic 12 is recommended to be placed close to the cells it controls, but away from high current circuits to reduce interference to measuring circuits and increase overall reliability of installation.
7
8 The installation site must provide convenient access for subsequent connection to the device’s headers.
9
10 The BMS Logic 12 has a heat sink to dissipate the heat generated during the balancing of the cells. When used in enclosed enclosures, heat must be removed from the sink, otherwise it may damage the device.
11
12 Overall and mounting dimensions of the BMS Logic 12 are shown below.
13
14 [[image:1736773655076-566.png||data-xwiki-image-style-alignment="center" height="534" width="600"]]
15
16 (% style="width:477px" %)
17 |**Parameter**|(% style="width:160px" %)**Value**
18 |Overall dimensions (length × width × height), mm|(% style="width:160px" %)139 × 126 × 16
19 |Mounting dimensions (length × width), mm|(% style="width:160px" %)123 × 118
20 |Mounting holes|(% style="width:160px" %)M4
21 |Headers X1-X4 type|(% style="width:160px" %)Molex series Micro-Fit
22
23 == Headers ==
24
25 The BMS Logic 12 is designed to measure temperature and voltage of 12 battery cells.
26
27 [[image:1736770542979-717.png||data-xwiki-image-style-alignment="center" height="356" width="450"]]
28
29 (% class="box warningmessage" %)
30 (((
31 **Attention!**
32 All headers are shown from the device side!
33 )))
34
35 === X1 – header for cells ===
36
37 [[image:1733143152741-474.jpeg||data-xwiki-image-style-alignment="center" height="81" width="210"]]
38
39 |**Pin**|**Name**|**Description**
40 |**1**|**V-**|Minus of the cell stack
41 |**2**|**C2**|Cell #2
42 |**3**|**C4**|Cell #4
43 |**4**|**C6**|Cell #6
44 |**5**|**C8**|Cell #8
45 |**6**|**C10**|Cell #10
46 |**7**|**C12**|Cell #12 (maximum potential of the cell stack)
47 |**8**|-|-
48 |**9**|**C1**|Cell #1 (minimum potential with respect to V-)
49 |**10**|**C3**|Cell #3
50 |**11**|**C5**|Cell #5
51 |**12**|**C7**|Cell #7
52 |**13**|**C9**|Cell #9
53 |**14**|**C11**|Cell #11
54
55 === X2 – header for temperature sensors ===
56
57 [[image:1733143152745-708.jpeg||data-xwiki-image-style-alignment="center" height="92" width="368"]]
58
59 |**Pin**|**Name**|**Description**
60 |**1**|**TEMPG12**|Ground of the thermistor #12
61 |**2**|**TEMPG11**|Ground of the thermistor #11
62 |**3**|**TEMPG10**|Ground of the thermistor #10
63 |**4**|**TEMPG9**|Ground of the thermistor #9
64 |**5**|**TEMPG8**|Ground of the thermistor #8
65 |**6**|**TEMPG7**|Ground of the thermistor #7
66 |**7**|**TEMPG6**|Ground of the thermistor #6
67 |**8**|**TEMPG5**|Ground of the thermistor #5
68 |**9**|**TEMPG4**|Ground of the thermistor #4
69 |**10**|**TEMPG3**|Ground of the thermistor #3
70 |**11**|**TEMPG2**|Ground of the thermistor #2
71 |**12**|**TEMPG1**|Ground of the thermistor #1
72 |**13**|**TEMP12**|Signal from the thermistor #12
73 |**14**|**TEMP11**|Signal from the thermistor #11
74 |**15**|**TEMP10**|Signal from the thermistor #10
75 |**16**|**TEMP9**|Signal from the thermistor #9
76 |**17**|**TEMP8**|Signal from the thermistor #8
77 |**18**|**TEMP7**|Signal from the thermistor #7
78 |**19**|**TEMP6**|Signal from the thermistor #6
79 |**20**|**TEMP5**|Signal from the thermistor #5
80 |**21**|**TEMP4**|Signal from the thermistor #4
81 |**22**|**TEMP3**|Signal from the thermistor #3
82 |**23**|**TEMP2**|Signal from the thermistor #2
83 |**24**|**TEMP1**|Signal from the thermistor #1
84
85 === X3, X4 – headers for communication with BMS Main ===
86
87 [[image:1733151077073-306.png||data-xwiki-image-style-alignment="center" height="78" width="71"]]
88
89 |**Pin**|**Name**|**Description**
90 |**1**|**RS485_A**|RS-485 line A for communication with the BMS Main
91 |**2**|**RS485_B**|RS-485 line B for communication with the BMS Main
92 |**3**|**+5V**|Supply voltage 5V
93 |**4**|**GND**|Ground
94
95 == (% style="color:inherit; font-family:inherit; font-size:max(20px, min(24px, 12.8889px + 0.925926vw))" %)Switches and indicators(%%) ==
96
97 === SWD1 – address switch ===
98
99 |**Switch number**|**Description**
100 |**1**|The first (the lowest) bit of the address. Position ON - bit is 1
101 |**2**|The second bit is the address. Position ON - bit is 1
102 |**3**|The third bit of the address. Position ON - bit is 1
103 |**4**|The fourth bit of the address. Position ON - bit is 1
104 |**5**|The fifth (the highest) bit of the address. Position ON - bit is 1
105
106 (% class="box infomessage" %)
107 (((
108 **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>>doc:Battery management systems.BMS Logic 12.3\. Configuration.WebHome]]).
109 )))
110
111 === SWD2 – RS-485 termination resistor switch ===
112
113 To connect the termination resistor between the **RS485_A** and **RS485_B** lines, switch the SWD2 to the ON position.
114
115 (% class="box infomessage" %)
116 (((
117 **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.
118 )))
119
120 === DS1 – mode indicator ===
121
122 (% style="width:718px" %)
123 |**State**|(% style="width:422px" %)**Description**
124 |Blinking|(% style="width:422px" %)Connection between the BMS Main and the device is established
125 |Short flashing (~~50 milliseconds in a second)|(% style="width:422px" %)The device is measuring voltage and temperature. No communication between the BMS Main and the device
126 |Long flashing (1 second in a 2 second period)|(% style="width:422px" %)The device is in the bootloader mode
127
128 == Connection procedure ==
129
130 === Connection to BMS Main ===
131
132 To connect the BMS Main to BMS Logic 12 do the following steps:
133
134 1. Connect the BMS Main to the first BMS Logic 12 (P15 -> X3).
135 1. Connect the BMS Logic 12 to each other (X4 -> X3).
136 1. 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.
137
138 (% class="box infomessage" %)
139 (((
140 **Recommendations:**
141 ~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.
142 2. Make all connections with the same cable.
143 3. For a total cable length of more than 10 meters use twisted pair with the 120 Ohm wave impedance.
144 )))
145
146 === Connecting battery cells ===
147
148 To connect the battery cells, follow Figure 16. Incorrect connection of the cells can damage the BMS Logic 12.
149
150 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.
151
152 [[image:1733145484804-250.jpeg||data-xwiki-image-style-alignment="center" height="507" width="587"]]
153
154
155 (% class="box warningmessage" %)
156 (((
157 **Attention!**
158 Connect the battery according to the diagram, otherwise the device may be damaged.
159 )))
160
161 === Connecting thermistors ===
162
163 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).
164
165 [[image:1733231119798-210.jpeg||data-xwiki-image-style-alignment="center" height="408" width="539"]]
166
167