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Last modified by Admin on 2025/03/18 13:04
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To version 2.1
edited by Admin
on 2024/12/02 12:44
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19 19  |Mounting holes|(% style="width:160px" %)M4
20 20  |Headers X1-X4 type|(% style="width:160px" %)Molex series Micro-Fit
21 21  
22 -
23 23  == 2.2 Headers description ==
24 24  
24 +The BMS Logic 12 is designed to measure temperature and voltage of 12 battery cells.
25 +
25 25  [[image:1733143089674-767.png||data-xwiki-image-style-alignment="center" height="356" width="531"]]
26 26  
28 +=== 2.2.1 X1 – header for cells ===
29 +
30 +[[image:1733143152741-474.jpeg||data-xwiki-image-style-alignment="center" height="93" width="241"]]
31 +
32 +|**Pin**|**Name**|**Description**
33 +|**1**|**V-**|Minus of the cell stack
34 +|**2**|**C2**|Cell #2
35 +|**3**|**C4**|Cell #4
36 +|**4**|**C6**|Cell #6
37 +|**5**|**C8**|Cell #8
38 +|**6**|**C10**|Cell #10
39 +|**7**|**C12**|Cell #12 (maximum potential of the cell stack)
40 +|**8**|-|-
41 +|**9**|**C1**|Cell #1 (minimum potential with respect to V-)
42 +|**10**|**C3**|Cell #3
43 +|**11**|**C5**|Cell #5
44 +|**12**|**C7**|Cell #7
45 +|**13**|**C9**|Cell #9
46 +|**14**|**C11**|Cell #11
47 +
48 +=== 2.2.2 X2 – header for temperature sensors ===
49 +
50 +[[image:1733143152745-708.jpeg||data-xwiki-image-style-alignment="center" height="92" width="368"]]
51 +
52 +|**Pin**|**Name**|**Description**
53 +|**1**|**TEMPG12**|Ground of the thermistor #12
54 +|**2**|**TEMPG11**|Ground of the thermistor #11
55 +|**3**|**TEMPG10**|Ground of the thermistor #10
56 +|**4**|**TEMPG9**|Ground of the thermistor #9
57 +|**5**|**TEMPG8**|Ground of the thermistor #8
58 +|**6**|**TEMPG7**|Ground of the thermistor #7
59 +|**7**|**TEMPG6**|Ground of the thermistor #6
60 +|**8**|**TEMPG5**|Ground of the thermistor #5
61 +|**9**|**TEMPG4**|Ground of the thermistor #4
62 +|**10**|**TEMPG3**|Ground of the thermistor #3
63 +|**11**|**TEMPG2**|Ground of the thermistor #2
64 +|**12**|**TEMPG1**|Ground of the thermistor #1
65 +|**13**|**TEMP12**|Signal from the thermistor #12
66 +|**14**|**TEMP11**|Signal from the thermistor #11
67 +|**15**|**TEMP10**|Signal from the thermistor #10
68 +|**16**|**TEMP9**|Signal from the thermistor #9
69 +|**17**|**TEMP8**|Signal from the thermistor #8
70 +|**18**|**TEMP7**|Signal from the thermistor #7
71 +|**19**|**TEMP6**|Signal from the thermistor #6
72 +|**20**|**TEMP5**|Signal from the thermistor #5
73 +|**21**|**TEMP4**|Signal from the thermistor #4
74 +|**22**|**TEMP3**|Signal from the thermistor #3
75 +|**23**|**TEMP2**|Signal from the thermistor #2
76 +|**24**|**TEMP1**|Signal from the thermistor #1
77 +
78 +=== 2.2.3 X3, X4 – headers for communication with BMS Main ===
79 +
80 +|**Pin**|**Name**|**Description**
81 +|**1**|**RS485_A**|RS-485 line A for communication with the BMS Main
82 +|**2**|**RS485_B**|RS-485 line B for communication with the BMS Main
83 +|**3**|**+5V**|Supply voltage 5V
84 +|**4**|**GND**|Ground
85 +
86 +== 2.3 Switches and indicators ==
87 +
88 +=== 2.3.1 SWD1 – address switch ===
89 +
90 +|**Switch number**|**Description**
91 +|**1**|The first (the lowest) bit of the address. Position ON - bit is 1
92 +|**2**|The second bit is the address. Position ON - bit is 1
93 +|**3**|The third bit of the address. Position ON - bit is 1
94 +|**4**|The fourth bit of the address. Position ON - bit is 1
95 +|**5**|The fifth (the highest) bit of the address. Position ON - bit is 1
96 +
97 +(% class="box infomessage" %)
98 +(((
99 +**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 3.2** **Configuration procedure).
100 +)))
101 +
102 +=== 2.3.2 SWD2 – RS-485 termination resistor switch ===
103 +
104 +To connect the termination resistor between the **RS485_A** and **RS485_B** lines, switch the SWD2 to the ON position.
105 +
106 +(% class="box infomessage" %)
107 +(((
108 +**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.
109 +)))
110 +
111 +=== 2.3.3 DS1 – mode indicator ===
112 +
113 +|**State**|**Description**
114 +|Blinking|Connection between the BMS Main and the device is established
115 +|Short flashing (~~50 milliseconds in a second)|The device is measuring voltage and temperature. No communication between the BMS Main and the device
116 +|Long flashing (1 second in a 2 second period)|The device is in the bootloader mode
117 +
27 27  
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