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Last modified by Admin on 2025/07/15 17:33
From version 20.2
edited by Admin
on 2024/11/13 17:33
Change comment: Update document after refactoring.
To version 21.3
edited by Admin
on 2024/11/19 07:56
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Summary

Details

Page properties
Title
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1 -2. Connection
1 +2. Connection procedure
Content
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1 -= ​​​​Headers =
1 +The mounting area of the BMS Main 2.1 must be protected from mechanical particles (dust, dirt, large objects) and water. The installation site must provide convenient access for subsequent connection to the device’s headers.
2 2  
3 +1. Connect the charging and discharging contactors to the P6-P9 headers.
4 +1. Connect a current sensor to the P12 header according to its documentation. The positive current direction (indicated by an arrow on the sensor) corresponds to the battery charging. It is recommended to use a shielded cable to connect the current sensor, the shield should be grounded on the side of the current sensor. The cable should be positioned as far as possible from the high current circuits. If the current sensor has a reference voltage line, connect it to pin 4 of the P12 header.
5 +1. Connect the BMS Main 2.1 to the on-board CAN network. Observe the rules for connecting CAN devices. If the BMS Main 2.1 is the last device on a bus, close pins 1-2 on the P21 jumper, otherwise leave the jumper on pins 2-3.
6 +1. Connect a power supply to the P1 header. It is not recommended to power the BMS Main 2.1 from the battery only, since at a critical discharge of the battery, it is not possible to turn on the BMS and close the charging contactor.
7 +
8 += ​​​​Headers description =
9 +
3 3  The BMS Main 2.1 headers are shown in figure below.
4 4  
5 5  [[The BMS Main 2.1 headers>>image:1731517946345-632.png||height="417" width="451"]]
6 6  
14 +(% class="wikigeneratedid" %)
15 +Following chapters describes the BMS Main 2.1 headers pinout.
16 +
7 7  === P1 – header for power supply ===
8 8  
9 9  [[image:1731516593096-166.png||data-xwiki-image-style-alignment="center"]]
10 10  
11 -|**Pin**|**Name**|**Description**
12 -|**1**|**GND**|Ground
13 -|**2**|**V+**|Supply voltage 9-30V
21 +(% style="width:339px" %)
22 +|(% style="width:71px" %)**Pin**|(% style="width:91px" %)**Name**|(% style="width:174px" %)**Description**
23 +|(% style="width:71px" %)**1**|(% style="width:91px" %)**GND**|(% style="width:174px" %)Ground
24 +|(% style="width:71px" %)**2**|(% style="width:91px" %)**V+**|(% style="width:174px" %)Supply voltage 9-30V
14 14  
15 15  === P15 – header for BMS Logic ===
16 16  
17 17  [[image:1731516577472-301.png||data-xwiki-image-style-alignment="center"]]
18 18  
19 -|**Pin**|**Name**|**Description**
20 -|**1**|**RS485_A**|RS-485 line A for communication with BMS Logic
21 -|**2**|**RS485_B**|RS-485 line B for communication with BMS Logic
22 -|**3**|**+5V**|Supply voltage for BMS Logic
23 -|**4**|**GND**|Ground
30 +(% style="width:524px" %)
31 +|(% style="width:69px" %)**Pin**|(% style="width:97px" %)**Name**|(% style="width:355px" %)**Description**
32 +|(% style="width:69px" %)**1**|(% style="width:97px" %)**RS485_A**|(% style="width:355px" %)RS-485 line A for communication with BMS Logic
33 +|(% style="width:69px" %)**2**|(% style="width:97px" %)**RS485_B**|(% style="width:355px" %)RS-485 line B for communication with BMS Logic
34 +|(% style="width:69px" %)**3**|(% style="width:97px" %)**+5V**|(% style="width:355px" %)Supply voltage for BMS Logic
35 +|(% style="width:69px" %)**4**|(% style="width:97px" %)**GND**|(% style="width:355px" %)Ground
24 24  
25 25  === P12 – header for current sensor ===
26 26  
27 27  [[image:1731516685999-633.png||data-xwiki-image-style-alignment="center"]]
28 28  
29 -|**Pin**|**Name**|**Description**
30 -|**1**|**+5V**|Supply voltage for the current sensor 5V, max 50 mA
31 -|**2**|**GND**|Ground
32 -|**3**|**Vcs**|ADC input (current sensor output)
33 -|**4**|**Vref**|ADC input (current sensor reference signal)
41 +(% style="width:531px" %)
42 +|(% style="width:75px" %)**Pin**|(% style="width:93px" %)**Name**|(% style="width:360px" %)**Description**
43 +|(% style="width:75px" %)**1**|(% style="width:93px" %)**+5V**|(% style="width:360px" %)Supply voltage for the current sensor 5V, max 50 mA
44 +|(% style="width:75px" %)**2**|(% style="width:93px" %)**GND**|(% style="width:360px" %)Ground
45 +|(% style="width:75px" %)**3**|(% style="width:93px" %)**Vcs**|(% style="width:360px" %)ADC input (current sensor output)
46 +|(% style="width:75px" %)**4**|(% style="width:93px" %)**Vref**|(% style="width:360px" %)ADC input (current sensor reference signal)
34 34  
35 35  === P13 – header for humidity sensor ===
36 36  
37 37  [[image:1731516942455-641.png||data-xwiki-image-style-alignment="center"]]
38 38  
39 -|**Pin**|**Name**|**Description**
40 -|**1**|**+5V**|Supply voltage 5 V, max 50 mA
41 -|**2**|**GND**|Ground
42 -|**3**|**Vhs**|ADC input (humidity sensor output)
43 -|**4**|**Vts**|ADC input (temperature sensor output)
52 +(% style="width:531px" %)
53 +|(% style="width:77px" %)**Pin**|(% style="width:92px" %)**Name**|(% style="width:359px" %)**Description**
54 +|(% style="width:77px" %)**1**|(% style="width:92px" %)**+5V**|(% style="width:359px" %)Supply voltage 5 V, max 50 mA
55 +|(% style="width:77px" %)**2**|(% style="width:92px" %)**GND**|(% style="width:359px" %)Ground
56 +|(% style="width:77px" %)**3**|(% style="width:92px" %)**Vhs**|(% style="width:359px" %)ADC input (humidity sensor output)
57 +|(% style="width:77px" %)**4**|(% style="width:92px" %)**Vts**|(% style="width:359px" %)ADC input (temperature sensor output)
44 44  
45 45  === P8 – header of relay 1 ===
46 46  
... ... @@ -48,9 +48,10 @@
48 48  
49 49  By default, relay 1 is used to control the discharging contactor.
50 50  
51 -|**Pin**|**Name**|**Description**
52 -|**1**|**V+**|Switching voltage (up to 55V, max 2A)
53 -|**2**|**NO**|Normally open contact
65 +(% style="width:527px" %)
66 +|(% style="width:82px" %)**Pin**|(% style="width:91px" %)**Name**|(% style="width:351px" %)**Description**
67 +|(% style="width:82px" %)**1**|(% style="width:91px" %)**V+**|(% style="width:351px" %)Switching voltage (up to 55V, max 2A)
68 +|(% style="width:82px" %)**2**|(% style="width:91px" %)**NO**|(% style="width:351px" %)Normally open contact
54 54  
55 55  === P9 – header of relay 2 ===
56 56  
... ... @@ -58,9 +58,10 @@
58 58  
59 59  By default, relay 2 is used to output the “Allow charging” signal.
60 60  
61 -|**Pin**|**Name**|**Description**
62 -|**1**|**V+**|Switching voltage (up to 55V, max 2A)
63 -|**2**|**NO**|Normally open contact
76 +(% style="width:524px" %)
77 +|(% style="width:89px" %)**Pin**|(% style="width:91px" %)**Name**|(% style="width:341px" %)**Description**
78 +|(% style="width:89px" %)**1**|(% style="width:91px" %)**V+**|(% style="width:341px" %)Switching voltage (up to 55V, max 2A)
79 +|(% style="width:89px" %)**2**|(% style="width:91px" %)**NO**|(% style="width:341px" %)Normally open contact
64 64  
65 65  === P6 – header of relay 3 ===
66 66  
... ... @@ -68,9 +68,10 @@
68 68  
69 69  By default, relay 3 is used to control the charging contactor.
70 70  
71 -|**Pin**|**Name**|**Description**
72 -|**1**|**V+**|Switching voltage (up to 55V, max 8A)
73 -|**2**|**NO**|Normally open contact
87 +(% style="width:524px" %)
88 +|(% style="width:101px" %)**Pin**|(% style="width:88px" %)**Name**|(% style="width:332px" %)**Description**
89 +|(% style="width:101px" %)**1**|(% style="width:88px" %)**V+**|(% style="width:332px" %)Switching voltage (up to 55V, max 8A)
90 +|(% style="width:101px" %)**2**|(% style="width:88px" %)**NO**|(% style="width:332px" %)Normally open contact
74 74  
75 75  === P7 – header of relay 4 ===
76 76  
... ... @@ -78,21 +78,23 @@
78 78  
79 79  By default, relay 4 is used to control the heater.
80 80  
81 -**Pin**|**Name**|**Description**
82 -**1**|**V+**|Switching voltage (up to 55V, max 8A)
83 -**2**|**NO**|Normally open contact
98 +(% style="width:530px" %)
99 +|(% style="width:102px" %)**Pin**|(% style="width:93px" %)**Name**|(% style="width:332px" %)**Description**
100 +|(% style="width:102px" %)**1**|(% style="width:93px" %)**V+**|(% style="width:332px" %)Switching voltage (up to 55V, max 8A)
101 +|(% style="width:102px" %)**2**|(% style="width:93px" %)**NO**|(% style="width:332px" %)Normally open contact
84 84  
85 85  === P14 – header for CAN and RS-485 interfaces ===
86 86  
87 87  [[image:1731517180930-597.png||data-xwiki-image-style-alignment="center"]]
88 88  
89 -|**Pin**|**Name**|**Description**
90 -|**1**|**EXT_RS485_A**|RS-485 line A for communication with external equipment
91 -|**2**|**CAN_H**|CAN H line for communication with external equipment
92 -|**3**|**+5V_CAN**|Supply voltage 5V for external devices, max 200 mA
93 -|**4**|**EXT_RS485_B**|RS-485 line B for communication with external equipment
94 -|**5**|**CAN_L**|CAN L line for communication with external equipment
95 -|**6**|**GND_CAN**|Ground
107 +(% style="width:641px" %)
108 +|(% style="width:107px" %)**Pin**|(% style="width:127px" %)**Name**|(% style="width:404px" %)**Description**
109 +|(% style="width:107px" %)**1**|(% style="width:127px" %)**EXT_RS485_A**|(% style="width:404px" %)RS-485 line A for communication with external equipment
110 +|(% style="width:107px" %)**2**|(% style="width:127px" %)**CAN_H**|(% style="width:404px" %)CAN H line for communication with external equipment
111 +|(% style="width:107px" %)**3**|(% style="width:127px" %)**+5V_CAN**|(% style="width:404px" %)Supply voltage 5V for external devices, max 200 mA
112 +|(% style="width:107px" %)**4**|(% style="width:127px" %)**EXT_RS485_B**|(% style="width:404px" %)RS-485 line B for communication with external equipment
113 +|(% style="width:107px" %)**5**|(% style="width:127px" %)**CAN_L**|(% style="width:404px" %)CAN L line for communication with external equipment
114 +|(% style="width:107px" %)**6**|(% style="width:127px" %)**GND_CAN**|(% style="width:404px" %)Ground
96 96  
97 97  === P21 – CAN termination resistor jumper ===
98 98  
... ... @@ -110,9 +110,9 @@
110 110  
111 111  To connect the termination resistor between the **EXT_RS485_A** and **EXT_RS485_B** lines, install a jumper according to the P22 pinout:
112 112  
113 -|**Pin**|**Name**|**Description**
114 -|**1-2**|**120 Ohm**|Terminating resistor 120 Ohm is connected
115 -|**2-3**|**-**|Terminating resistor 120 Ohm is not connected
132 +|**Pin**|(% style="width:108px" %)**Name**|(% style="width:1296px" %)**Description**
133 +|**1-2**|(% style="width:108px" %)**120 Ohm**|(% style="width:1296px" %)Terminating resistor 120 Ohm is connected
134 +|**2-3**|(% style="width:108px" %)**-**|(% style="width:1296px" %)Terminating resistor 120 Ohm is not connected
116 116  
117 117  === P11 – header for discrete inputs/outputs ===
118 118