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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
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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 +== Installation procedure ==
5 +
6 +Overall and mounting dimensions of the BMS Main 2.1 are shown below.
7 +
8 +[[image:1732198397369-222.png||data-xwiki-image-style-alignment="center" height="393" width="556"]]
9 +
10 +(% style="width:494px" %)
11 +|**Parameter**|(% style="width:178px" %)**Value**
12 +|Overall dimensions (length × width × height), mm|(% style="width:178px" %)120 × 120 × 32
13 +|Mounting dimensions (length × width), mm|(% style="width:178px" %)114 × 114
14 +|Mounting holes|(% style="width:178px" %)M3
15 +
16 +== Connection procedure ==
17 +
18 +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.
19 +
20 +1. Connect the charging and discharging contactors to the P6-P9 headers.
21 +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.
22 +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.
23 +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.
24 +
25 +== ​​​​Headers description ==
26 +
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"]]
29 +[[image:1731516393377-928.jpeg||alt="1731517946345-632.png" data-xwiki-image-style-alignment="center" height="417" width="451"]]
6 6  
7 -== P1 – header for power supply ==
31 +(% class="box warningmessage" %)
32 +(((
33 +**Attention!**
34 +All headers are shown from the device side!
35 +)))
8 8  
9 -[[image:1731516474613-418.png||height="89" width="47"]]
37 +=== P1 – header for power supply ===
10 10  
39 +Receptacle Housing: Molex 39012020. Terminals: Molex 5556
40 +
41 +[[image:1732198827034-560.png||data-xwiki-image-style-alignment="center" height="78" width="41"]]
42 +
11 11  |**Pin**|**Name**|**Description**
12 12  |**1**|**GND**|Ground
13 13  |**2**|**V+**|Supply voltage 9-30V
46 +
47 +=== P15 – header for BMS Logic ===
48 +
49 +Receptacle Housing: Molex 430250400. Terminals: Molex 43030
50 +
51 +[[image:1732198890482-787.png||data-xwiki-image-style-alignment="center" height="77" width="71"]]
52 +
53 +|**Pin**|**Name**|**Description**
54 +|**1**|**RS485_A**|RS-485 line A for communication with BMS Logic
55 +|**2**|**RS485_B**|RS-485 line B for communication with BMS Logic
56 +|**3**|**+5V**|Supply voltage for BMS Logic
57 +|**4**|**GND**|Ground
58 +
59 +=== P12 – header for current sensor ===
60 +
61 +Receptacle Housing: Molex 430250400. Terminals: Molex 43030
62 +
63 +[[image:1732198890482-787.png||data-xwiki-image-style-alignment="center" height="77" width="71"]]
64 +
65 +|**Pin**|**Name**|**Description**
66 +|**1**|**+5V**|Supply voltage for the current sensor 5V, max 50 mA
67 +|**2**|**GND**|Ground
68 +|**3**|**Vcs**|ADC input (current sensor output)
69 +|**4**|**Vref**|ADC input (current sensor reference signal)
70 +
71 +=== P13 – header for humidity sensor ===
72 +
73 +Receptacle Housing: Molex 430250400. Terminals: Molex 43030
74 +
75 +[[image:1732198896526-660.png||data-xwiki-image-style-alignment="center" height="70" width="64"]]
76 +
77 +|**Pin**|**Name**|**Description**
78 +|**1**|**+5V**|Supply voltage 5 V, max 50 mA
79 +|**2**|**GND**|Ground
80 +|**3**|**Vhs**|ADC input (humidity sensor output)
81 +|**4**|**Vts**|ADC input (temperature sensor output)
82 +
83 +=== P8 – header of relay 1 ===
84 +
85 +Receptacle Housing: Molex 39012020. Terminals: Molex 5556
86 +
87 +[[image:1732198827034-560.png||data-xwiki-image-style-alignment="center" height="78" width="41"]]
88 +
89 +By default, relay 1 is used to control the discharging contactor.
90 +
91 +|**Pin**|**Name**|**Description**
92 +|**1**|**V+**|Switching voltage (up to 55V, max 2A)
93 +|**2**|**NO**|Normally open contact
94 +
95 +=== P9 – header of relay 2 ===
96 +
97 +Receptacle Housing: Molex 39012020. Terminals: Molex 5556
98 +
99 +[[image:1732198827034-560.png||data-xwiki-image-style-alignment="center" height="78" width="41"]]
100 +
101 +By default, relay 2 is used to output the “Allow charging” signal.
102 +
103 +|**Pin**|**Name**|**Description**
104 +|**1**|**V+**|Switching voltage (up to 55V, max 2A)
105 +|**2**|**NO**|Normally open contact
106 +
107 +=== P6 – header of relay 3 ===
108 +
109 +Receptacle Housing: Molex 39012020. Terminals: Molex 5556
110 +
111 +[[image:1732198827034-560.png||data-xwiki-image-style-alignment="center" height="78" width="41"]]
112 +
113 +By default, relay 3 is used to control the charging contactor.
114 +
115 +|**Pin**|**Name**|**Description**
116 +|**1**|**V+**|Switching voltage (up to 55V, max 8A)
117 +|**2**|**NO**|Normally open contact
118 +
119 +=== P7 – header of relay 4 ===
120 +
121 +Receptacle Housing: Molex 39012020. Terminals: Molex 5556
122 +
123 +[[image:1732198827034-560.png||data-xwiki-image-style-alignment="center" height="78" width="41"]]
124 +
125 +By default, relay 4 is used to control the heater.
126 +
127 +|**Pin**|**Name**|**Description**
128 +|**1**|**V+**|Switching voltage (up to 55V, max 8A)
129 +|**2**|**NO**|Normally open contact
130 +
131 +=== P14 – header for CAN and RS-485 interfaces ===
132 +
133 +Receptacle Housing: Molex 430250600. Terminals: Molex 43030
134 +
135 +[[image:1731517180930-597.png||data-xwiki-image-style-alignment="center" height="81" width="113"]]
136 +
137 +(% style="width:641px" %)
138 +|**Pin**|**Name**|**Description**
139 +|**1**|**EXT_RS485_A**|RS-485 line A for communication with external equipment
140 +|**2**|**CAN_H**|CAN H line for communication with external equipment
141 +|**3**|**+5V_CAN**|Supply voltage 5V for external devices, max 200 mA
142 +|**4**|**EXT_RS485_B**|RS-485 line B for communication with external equipment
143 +|**5**|**CAN_L**|CAN L line for communication with external equipment
144 +|**6**|**GND_CAN**|Ground
145 +
146 +=== P21 – CAN termination resistor jumper ===
147 +
148 +[[image:1731517188900-976.png||data-xwiki-image-style-alignment="center" height="78" width="149"]]
149 +
150 +To connect the termination resistor between the lines **CAN_H** and **CAN_L**, install a jumper, according to the P21 pinout:
151 +
152 +|**Pin**|**Name**|**Description**
153 +|**1-2**|**120 Ohm**|Termination resistor 120 Ohm is connected
154 +|**2-3**|**-**|Termination resistor 120 Ohm is not connected
155 +
156 +=== P22 - RS-485 termination resistor jumper ===
157 +
158 +[[image:1731517195672-298.png||data-xwiki-image-style-alignment="center" height="81" width="155"]]
159 +
160 +To connect the termination resistor between the **EXT_RS485_A** and **EXT_RS485_B** lines, install a jumper according to the P22 pinout:
161 +
162 +|**Pin**|**Name**|**Description**
163 +|**1-2**|**120 Ohm**|Terminating resistor 120 Ohm is connected
164 +|**2-3**|**-**|Terminating resistor 120 Ohm is not connected
165 +
166 +=== P11 – header for discrete inputs/outputs ===
167 +
168 +Receptacle Housing: Molex 430251600. Terminals: Molex 43030
169 +
170 +[[image:1732198937514-731.png||data-xwiki-image-style-alignment="center" height="85" width="272"]]
171 +
172 +|**Pin**|**Name**|**Description**
173 +|**16**|**IN_1**|Discrete input #1 “dry contact” (+5V)
174 +|**8**|**GND_1**|Discrete input #1 “dry contact” (ground)
175 +|**15**|**IN_2**|Discrete input #2 “dry contact” (+5V)
176 +|**7**|**GND_2**|Discrete input #2 “dry contact” (ground)
177 +|**14**|**IN_3**|Discrete input #3 “dry contact” (+5V)
178 +|**6**|**GND_3**|Discrete input #3 “dry contact” (ground)
179 +|**13**|**IN_4**|Discrete input #4 “dry contact” (+5V)
180 +|**5**|**GND_4**|Discrete input #4 “dry contact” (ground)
181 +|**12**|**OUT_4**|Discrete output #4 (+5V, 20mA)
182 +|**4**|**GND_OUT_4**|Discrete output #4 (ground)
183 +|**11**|**OUT_3**|Discrete output #3 (+5V, 20mA)
184 +|**3**|**GND_OUT_3**|Discrete output #3 (ground)
185 +|**10**|**OUT_2**|Discrete output #2 (+5V, 20mA)
186 +|**2**|**GND_OUT_2**|Discrete output #2 (ground)
187 +|**9**|**OUT_1**|Discrete output #1 (+5V, 20mA)
188 +|**1**|**GND_OUT_1**|Discrete output #1 (ground)
189 +
190 +== Indicators ==
191 +
192 +=== DS1 – power indicator ===
193 +
194 +|**State**|**Description**
195 +|**Lights red**|The device is powered
196 +|**Off**|The device is not powered
197 +
198 +=== DS2 – operation indicator ===
199 +
200 +|**State**|**Description**
201 +|**Blinking green**|The BMS firmware is running
202 +|**Off**|The BMS firmware is not running
203 +
204 +=== DS3 – communication indicator ===
205 +
206 +|**State**|**Description**
207 +|**Blinking yellow (2Hz)**|Initializing communication with BMS Logic boards
208 +|**Blinking yellow (25Hz)**|Communication with BMS Logic is established
209 +
210 +=== DS4 – error indicator ===
211 +
212 +
213 +|(**State**|**Description**
214 +|(**Blinking red**|Errors in communication with BMS Logic
215 +
216 +=== DS7 – relay 1 indicator ===
217 +
218 +|**State**|**Description**
219 +|**Lights green**|Relay #1 is closed
220 +|**Off**|Relay #1 is opened
221 +
222 +=== DS8 – relay 2 indicator ===
223 +
224 +|**State**|**Description**
225 +|**Lights green**|Relay #2 is closed
226 +|**Off**|Relay #2 is opened
227 +
228 +=== DS5 – relay 3 indicator ===
229 +
230 +|**State**|**Description**
231 +|**Lights green**|Relay #3 is closed
232 +|**Off**|Relay #3 is opened
233 +
234 +=== DS6 – relay 4 indicator ===
235 +
236 +|**State**|**Description**
237 +|**Lights green**|Relay #4 is closed
238 +|**Off**|Relay #4 is opened
239 +
240 +
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