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From version 14.1
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To version 70.1
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on 2025/07/15 17:33
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Title
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1 -2. Connection
1 +2. Installation and connection
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1 -Additional modules.BMS Main 2\.1.WebHome
1 +Battery management systems.BMS Main 2\.1.WebHome
Content
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1 -= ​​​​Headers =
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 += Installation and connection =
2 2  
4 +== Safety rules ==
5 +
6 +To perform the protection functions, the BMS must be able to disconnect the battery from the load and charger. To do this, **at least one contactor** able to break the load and charge circuits must be connected to the BMS.
7 +
8 +Before use, **configure the system**. Proper operation of the BMS is possible only if it is correctly configured.
9 +
10 +(% class="box errormessage" %)
11 +(((
12 +The BMS can be connected to batteries with life-threatening and health-hazardous voltage levels. When working with high-voltage batteries, observe electrical safety regulations, use safety glasses, protective clothing, insulated tools and appliances. To prevent the damage of device avoid electrostatic discharges while working with the battery.
13 +)))
14 +
15 +(% class="box errormessage" %)
16 +(((
17 +The system is not designed to operate with batteries whose total voltage exceeds 1200 V.
18 +)))
19 +
20 +== Installation procedure ==
21 +
22 +Overall and mounting dimensions of the BMS Main 2.1 are shown below.
23 +
24 +[[image:1752600650898-961.png||data-xwiki-image-style-alignment="center" height="546" width="450"]]
25 +
26 +(% style="width:494px" %)
27 +|**Parameter**|(% style="width:178px" %)**Value**
28 +|Overall dimensions (length × width × height), mm|(% style="width:178px" %)120 × 120 × 17
29 +|Mounting dimensions (length × width), mm|(% style="width:178px" %)114 × 114
30 +|Mounting holes|(% style="width:178px" %)M3
31 +
32 +== Connection procedure ==
33 +
34 +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.
35 +
36 +1. Connect the charging and discharging contactors to the P6-P9 headers.
37 +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.
38 +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.
39 +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.
40 +
41 +== ​​​​Headers description ==
42 +
3 3  The BMS Main 2.1 headers are shown in figure below.
4 4  
5 -[[The BMS Main 2.1 headers>>image:1731516393377-928.jpeg||height="430" width="428"]]
45 +[[image:1731516393377-928.jpeg||alt="1731517946345-632.png" data-xwiki-image-style-alignment="center" height="417" width="451"]]
6 6  
47 +(% class="box warningmessage" %)
48 +(((
49 +**Attention!**
50 +All headers are shown from the device side!
51 +)))
52 +
7 7  === P1 – header for power supply ===
8 8  
9 -[[image:1731516593096-166.png||data-xwiki-image-style-alignment="center"]]
55 +Receptacle Housing: Molex 39012020. Terminals: Molex 5556
10 10  
11 -|(% style="width:100px" %)**Pin**|(% style="width:502px" %)**Name**|**Description**
12 -|(% style="width:100px" %)**1**|(% style="width:502px" %)**GND**|Ground
13 -|(% style="width:100px" %)**2**|(% style="width:502px" %)**V+**|Supply voltage 9-30V
57 +[[image:1732198827034-560.png||data-xwiki-image-style-alignment="center" height="78" width="41"]]
14 14  
59 +|**Pin**|**Name**|**Description**
60 +|**1**|**GND**|Ground
61 +|**2**|**V+**|Supply voltage 9-30V
62 +
15 15  === P15 – header for BMS Logic ===
16 16  
17 -[[image:1731516577472-301.png||data-xwiki-image-style-alignment="center"]]
65 +Receptacle Housing: Molex 430250400. Terminals: Molex 43030
18 18  
19 -|(% style="width:100px" %)**Pin**|(% style="width:290px" %)**Name**|**Description**
20 -|(% style="width:100px" %)**1**|(% style="width:290px" %)**RS485_A**|RS-485 line A for communication with BMS Logic
21 -|(% style="width:100px" %)**2**|(% style="width:290px" %)**RS485_B**|RS-485 line B for communication with BMS Logic
22 -|(% style="width:100px" %)**3**|(% style="width:290px" %)**+5V**|Supply voltage for BMS Logic
23 -|(% style="width:100px" %)**4**|(% style="width:290px" %)**GND**|Ground
67 +[[image:1732198890482-787.png||data-xwiki-image-style-alignment="center" height="77" width="71"]]
24 24  
69 +|**Pin**|**Name**|**Description**
70 +|**1**|**RS485_A**|RS-485 line A for communication with BMS Logic
71 +|**2**|**RS485_B**|RS-485 line B for communication with BMS Logic
72 +|**3**|**+5V**|Supply voltage for BMS Logic
73 +|**4**|**GND**|Ground
74 +
25 25  === P12 – header for current sensor ===
26 26  
27 -[[image:1731516685999-633.png||data-xwiki-image-style-alignment="center"]]
77 +Receptacle Housing: Molex 430250400. Terminals: Molex 43030
28 28  
79 +[[image:1732198890482-787.png||data-xwiki-image-style-alignment="center" height="77" width="71"]]
80 +
29 29  |**Pin**|**Name**|**Description**
30 30  |**1**|**+5V**|Supply voltage for the current sensor 5V, max 50 mA
31 31  |**2**|**GND**|Ground
... ... @@ -34,8 +34,10 @@
34 34  
35 35  === P13 – header for humidity sensor ===
36 36  
37 -[[image:1731516942455-641.png||data-xwiki-image-style-alignment="center"]]
89 +Receptacle Housing: Molex 430250400. Terminals: Molex 43030
38 38  
91 +[[image:1732198896526-660.png||data-xwiki-image-style-alignment="center" height="70" width="64"]]
92 +
39 39  |**Pin**|**Name**|**Description**
40 40  |**1**|**+5V**|Supply voltage 5 V, max 50 mA
41 41  |**2**|**GND**|Ground
... ... @@ -44,48 +44,71 @@
44 44  
45 45  === P8 – header of relay 1 ===
46 46  
47 -[[image:1731517023208-641.png||data-xwiki-image-style-alignment="center"]]
101 +Receptacle Housing: Molex 39012020. Terminals: Molex 5556
48 48  
103 +[[image:1732198827034-560.png||data-xwiki-image-style-alignment="center" height="78" width="41"]]
104 +
49 49  By default, relay 1 is used to control the discharging contactor.
50 50  
51 51  |**Pin**|**Name**|**Description**
52 -|**1**|**V+**|Switching voltage (up to 55V, max 2A)
108 +|**1**|**V+**|Switching voltage (up to 55V, max 3A)
53 53  |**2**|**NO**|Normally open contact
54 54  
111 +Contactor connection example for all relays:
112 +
113 +[[image:1741619814065-850.png||height="189" width="252"]]
114 +
55 55  === P9 – header of relay 2 ===
56 56  
57 -[[image:1731517025702-799.png||data-xwiki-image-style-alignment="center"]]
117 +Receptacle Housing: Molex 39012020. Terminals: Molex 5556
58 58  
119 +[[image:1732198827034-560.png||data-xwiki-image-style-alignment="center" height="78" width="41"]]
120 +
59 59  By default, relay 2 is used to output the “Allow charging” signal.
60 60  
61 61  |**Pin**|**Name**|**Description**
62 -|**1**|**V+**|Switching voltage (up to 55V, max 2A)
124 +|**1**|**V+**|Switching voltage (up to 55V, max 3A)
63 63  |**2**|**NO**|Normally open contact
64 64  
127 +Contactor connection example: see relay 1.
128 +
65 65  === P6 – header of relay 3 ===
66 66  
67 -[[image:1731517025702-799.png||data-xwiki-image-style-alignment="center"]]
131 +Receptacle Housing: Molex 39012020. Terminals: Molex 5556
68 68  
133 +[[image:1732198827034-560.png||data-xwiki-image-style-alignment="center" height="78" width="41"]]
134 +
69 69  By default, relay 3 is used to control the charging contactor.
70 70  
71 71  |**Pin**|**Name**|**Description**
72 -|**1**|**V+**|Switching voltage (up to 55V, max 8A)
138 +|**1**|**V+**|Switching voltage up to 55V,
139 +up to 8A (board rev. 2.1b), up to 3A (board rev. 2.1c)
73 73  |**2**|**NO**|Normally open contact
74 74  
142 +Contactor connection example: see relay 1.
143 +
75 75  === P7 – header of relay 4 ===
76 76  
77 -[[image:1731517025702-799.png||data-xwiki-image-style-alignment="center"]]
146 +Receptacle Housing: Molex 39012020. Terminals: Molex 5556
78 78  
148 +[[image:1732198827034-560.png||data-xwiki-image-style-alignment="center" height="78" width="41"]]
149 +
79 79  By default, relay 4 is used to control the heater.
80 80  
81 81  |**Pin**|**Name**|**Description**
82 -|**1**|**V+**|Switching voltage (up to 55V, max 8A)
153 +|**1**|**V+**|Switching voltage up to 55V,
154 +up to 8A (board rev. 2.1b), up to 3A (board rev. 2.1c)
83 83  |**2**|**NO**|Normally open contact
84 84  
157 +Contactor connection example: see relay 1.
158 +
85 85  === P14 – header for CAN and RS-485 interfaces ===
86 86  
87 -[[image:1731517180930-597.png||data-xwiki-image-style-alignment="center"]]
161 +Receptacle Housing: Molex 430250600. Terminals: Molex 43030
88 88  
163 +[[image:1731517180930-597.png||data-xwiki-image-style-alignment="center" height="81" width="113"]]
164 +
165 +(% style="width:641px" %)
89 89  |**Pin**|**Name**|**Description**
90 90  |**1**|**EXT_RS485_A**|RS-485 line A for communication with external equipment
91 91  |**2**|**CAN_H**|CAN H line for communication with external equipment
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96 96  
97 97  === P21 – CAN termination resistor jumper ===
98 98  
99 -[[image:1731517188900-976.png||data-xwiki-image-style-alignment="center"]]
176 +[[image:1731517188900-976.png||data-xwiki-image-style-alignment="center" height="78" width="149"]]
100 100  
101 101  To connect the termination resistor between the lines **CAN_H** and **CAN_L**, install a jumper, according to the P21 pinout:
102 102  
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106 106  
107 107  === P22 - RS-485 termination resistor jumper ===
108 108  
109 -[[image:1731517195672-298.png||data-xwiki-image-style-alignment="center"]]
186 +[[image:1731517195672-298.png||data-xwiki-image-style-alignment="center" height="81" width="155"]]
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  
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116 116  
117 117  === P11 – header for discrete inputs/outputs ===
118 118  
119 -[[image:1731517206246-979.png||data-xwiki-image-style-alignment="center"]]
196 +Receptacle Housing: Molex 430251600. Terminals: Molex 43030
120 120  
198 +[[image:1732198937514-731.png||data-xwiki-image-style-alignment="center" height="85" width="272"]]
199 +
121 121  |**Pin**|**Name**|**Description**
122 122  |**16**|**IN_1**|Discrete input #1 “dry contact” (+5V)
123 123  |**8**|**GND_1**|Discrete input #1 “dry contact” (ground)
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136 136  |**9**|**OUT_1**|Discrete output #1 (+5V, 20mA)
137 137  |**1**|**GND_OUT_1**|Discrete output #1 (ground)
138 138  
139 -= Indicators =
218 +== Indicators ==
140 140  
141 141  === DS1 – power indicator ===
142 142  
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158 158  
159 159  === DS4 – error indicator ===
160 160  
161 -|**State**|**Description**
162 -|**Blinking red**|Errors in communication with BMS Logic
163 163  
241 +|(**State**|**Description**
242 +|(**Blinking red**|Errors in communication with BMS Logic
243 +
164 164  === DS7 – relay 1 indicator ===
165 165  
166 166  |**State**|**Description**
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