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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 +drafts.BMS Main 2\.1.WebHome
Content
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1 -= ​​​​Headers =
1 +== 2.1 Installation procedure ==
2 2  
3 +Overall and mounting dimensions of the BMS Main 2.1 are shown in Figure 29.
4 +
5 +[[image:1732198397369-222.png||data-xwiki-image-style-alignment="center" height="393" width="556"]]
6 +
7 +|**Parameter**|**Value**
8 +|(((
9 +Overall dimensions (length × width × height), mm
10 +)))|120 × 120 × 32
11 +|Mounting dimensions (length × width), mm|114 × 114
12 +|Mounting holes|M3
13 +
14 +== 2.2 Connection procedure ==
15 +
16 +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.
17 +
18 +1. Connect the charging and discharging contactors to the P6-P9 headers.
19 +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.
20 +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.
21 +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.
22 +
23 +== 2.3 ​​​​Headers description ==
24 +
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"]]
27 +[[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 ==
29 +(% class="wikigeneratedid" %)
30 +Following chapters describes the BMS Main 2.1 headers pinout.
8 8  
9 -[[image:1731516593096-166.png||data-xwiki-image-style-alignment="center" height="93" width="49"]]
32 +=== 2.3.1 P1 – header for power supply ===
10 10  
11 -|**Pin**|**Name**|**Description**
12 -|**1**|**GND**|Ground
13 -|**2**|**V+**|Supply voltage 9-30V
34 +[[image:1732198827034-560.png||height="78" width="41"]]
14 14  
15 -== P15 – header for BMS Logic ==
36 +(% style="width:339px" %)
37 +|(% style="width:71px" %)**Pin**|(% style="width:91px" %)**Name**|(% style="width:174px" %)**Description**
38 +|(% style="width:71px" %)**1**|(% style="width:91px" %)**GND**|(% style="width:174px" %)Ground
39 +|(% style="width:71px" %)**2**|(% style="width:91px" %)**V+**|(% style="width:174px" %)Supply voltage 9-30V
16 16  
17 -[[image:1731516577472-301.png||data-xwiki-image-style-alignment="center" height="90" width="83"]]
41 +=== 2.3.2 P15 – header for BMS Logic ===
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
43 +[[image:1732198890482-787.png||height="77" width="71"]]
24 24  
25 -== P12 – header for current sensor ==
26 26  
27 -[[image:1731516685999-633.png||data-xwiki-image-style-alignment="center"]]
46 +(% style="width:524px" %)
47 +|(% style="width:69px" %)**Pin**|(% style="width:97px" %)**Name**|(% style="width:355px" %)**Description**
48 +|(% style="width:69px" %)**1**|(% style="width:97px" %)**RS485_A**|(% style="width:355px" %)RS-485 line A for communication with BMS Logic
49 +|(% style="width:69px" %)**2**|(% style="width:97px" %)**RS485_B**|(% style="width:355px" %)RS-485 line B for communication with BMS Logic
50 +|(% style="width:69px" %)**3**|(% style="width:97px" %)**+5V**|(% style="width:355px" %)Supply voltage for BMS Logic
51 +|(% style="width:69px" %)**4**|(% style="width:97px" %)**GND**|(% style="width:355px" %)Ground
52 +
53 +=== 2.3.3 P12 – header for current sensor ===
54 +
55 +[[image:1732198890482-787.png||height="77" width="71"]]
56 +
57 +(% style="width:531px" %)
58 +|(% style="width:75px" %)**Pin**|(% style="width:93px" %)**Name**|(% style="width:360px" %)**Description**
59 +|(% style="width:75px" %)**1**|(% style="width:93px" %)**+5V**|(% style="width:360px" %)Supply voltage for the current sensor 5V, max 50 mA
60 +|(% style="width:75px" %)**2**|(% style="width:93px" %)**GND**|(% style="width:360px" %)Ground
61 +|(% style="width:75px" %)**3**|(% style="width:93px" %)**Vcs**|(% style="width:360px" %)ADC input (current sensor output)
62 +|(% style="width:75px" %)**4**|(% style="width:93px" %)**Vref**|(% style="width:360px" %)ADC input (current sensor reference signal)
63 +
64 +=== 2.3.4 P13 – header for humidity sensor ===
65 +
66 +[[image:1732198896526-660.png||height="70" width="64"]]
67 +
68 +(% style="width:531px" %)
69 +|(% style="width:77px" %)**Pin**|(% style="width:92px" %)**Name**|(% style="width:359px" %)**Description**
70 +|(% style="width:77px" %)**1**|(% style="width:92px" %)**+5V**|(% style="width:359px" %)Supply voltage 5 V, max 50 mA
71 +|(% style="width:77px" %)**2**|(% style="width:92px" %)**GND**|(% style="width:359px" %)Ground
72 +|(% style="width:77px" %)**3**|(% style="width:92px" %)**Vhs**|(% style="width:359px" %)ADC input (humidity sensor output)
73 +|(% style="width:77px" %)**4**|(% style="width:92px" %)**Vts**|(% style="width:359px" %)ADC input (temperature sensor output)
74 +
75 +=== 2.3.5 P8 – header of relay 1 ===
76 +
77 +[[image:1732198827034-560.png||height="78" width="41"]]
78 +
79 +By default, relay 1 is used to control the discharging contactor.
80 +
81 +(% style="width:527px" %)
82 +|(% style="width:82px" %)**Pin**|(% style="width:91px" %)**Name**|(% style="width:351px" %)**Description**
83 +|(% style="width:82px" %)**1**|(% style="width:91px" %)**V+**|(% style="width:351px" %)Switching voltage (up to 55V, max 2A)
84 +|(% style="width:82px" %)**2**|(% style="width:91px" %)**NO**|(% style="width:351px" %)Normally open contact
85 +
86 +=== 2.3.6 P9 – header of relay 2 ===
87 +
88 +[[image:1732198827034-560.png||height="78" width="41"]]
89 +
90 +By default, relay 2 is used to output the “Allow charging” signal.
91 +
92 +(% style="width:524px" %)
93 +|(% style="width:89px" %)**Pin**|(% style="width:91px" %)**Name**|(% style="width:341px" %)**Description**
94 +|(% style="width:89px" %)**1**|(% style="width:91px" %)**V+**|(% style="width:341px" %)Switching voltage (up to 55V, max 2A)
95 +|(% style="width:89px" %)**2**|(% style="width:91px" %)**NO**|(% style="width:341px" %)Normally open contact
96 +
97 +=== 2.3.7 P6 – header of relay 3 ===
98 +
99 +[[image:1732198827034-560.png||height="78" width="41"]]
100 +
101 +By default, relay 3 is used to control the charging contactor.
102 +
103 +(% style="width:524px" %)
104 +|(% style="width:101px" %)**Pin**|(% style="width:88px" %)**Name**|(% style="width:332px" %)**Description**
105 +|(% style="width:101px" %)**1**|(% style="width:88px" %)**V+**|(% style="width:332px" %)Switching voltage (up to 55V, max 8A)
106 +|(% style="width:101px" %)**2**|(% style="width:88px" %)**NO**|(% style="width:332px" %)Normally open contact
107 +
108 +=== 2.3.8 P7 – header of relay 4 ===
109 +
110 +[[image:1732198827034-560.png||height="78" width="41"]]
111 +
112 +By default, relay 4 is used to control the heater.
113 +
114 +(% style="width:530px" %)
115 +|(% style="width:102px" %)**Pin**|(% style="width:93px" %)**Name**|(% style="width:332px" %)**Description**
116 +|(% style="width:102px" %)**1**|(% style="width:93px" %)**V+**|(% style="width:332px" %)Switching voltage (up to 55V, max 8A)
117 +|(% style="width:102px" %)**2**|(% style="width:93px" %)**NO**|(% style="width:332px" %)Normally open contact
118 +
119 +=== 2.3.9 P14 – header for CAN and RS-485 interfaces ===
120 +
121 +[[image:1731517180930-597.png||height="81" width="113"]]
122 +
123 +(% style="width:641px" %)
124 +|(% style="width:107px" %)**Pin**|(% style="width:127px" %)**Name**|(% style="width:404px" %)**Description**
125 +|(% style="width:107px" %)**1**|(% style="width:127px" %)**EXT_RS485_A**|(% style="width:404px" %)RS-485 line A for communication with external equipment
126 +|(% style="width:107px" %)**2**|(% style="width:127px" %)**CAN_H**|(% style="width:404px" %)CAN H line for communication with external equipment
127 +|(% style="width:107px" %)**3**|(% style="width:127px" %)**+5V_CAN**|(% style="width:404px" %)Supply voltage 5V for external devices, max 200 mA
128 +|(% style="width:107px" %)**4**|(% style="width:127px" %)**EXT_RS485_B**|(% style="width:404px" %)RS-485 line B for communication with external equipment
129 +|(% style="width:107px" %)**5**|(% style="width:127px" %)**CAN_L**|(% style="width:404px" %)CAN L line for communication with external equipment
130 +|(% style="width:107px" %)**6**|(% style="width:127px" %)**GND_CAN**|(% style="width:404px" %)Ground
131 +
132 +=== 2.3.10 P21 – CAN termination resistor jumper ===
133 +
134 +[[image:1731517188900-976.png||height="78" width="149"]]
135 +
136 +To connect the termination resistor between the lines **CAN_H** and **CAN_L**, install a jumper, according to the P21 pinout:
137 +
138 +(% style="width:643px" %)
139 +|**Pin**|(% style="width:122px" %)**Name**|(% style="width:400px" %)**Description**
140 +|**1-2**|(% style="width:122px" %)**120 Ohm**|(% style="width:400px" %)Termination resistor 120 Ohm is connected
141 +|**2-3**|(% style="width:122px" %)**-**|(% style="width:400px" %)Termination resistor 120 Ohm is not connected
142 +
143 +=== 2.3.11 P22 - RS-485 termination resistor jumper ===
144 +
145 +[[image:1731517195672-298.png||height="81" width="155"]]
146 +
147 +To connect the termination resistor between the **EXT_RS485_A** and **EXT_RS485_B** lines, install a jumper according to the P22 pinout:
148 +
149 +(% style="width:644px" %)
150 +|**Pin**|(% style="width:121px" %)**Name**|(% style="width:402px" %)**Description**
151 +|**1-2**|(% style="width:121px" %)**120 Ohm**|(% style="width:402px" %)Terminating resistor 120 Ohm is connected
152 +|**2-3**|(% style="width:121px" %)**-**|(% style="width:402px" %)Terminating resistor 120 Ohm is not connected
153 +
154 +=== 2.3.12 P11 – header for discrete inputs/outputs ===
155 +
156 +[[image:1732198937514-731.png||height="85" width="272"]]
157 +
158 +(% style="width:584px" %)
159 +|(% style="width:98px" %)**Pin**|(% style="width:157px" %)**Name**|(% style="width:326px" %)**Description**
160 +|(% style="width:98px" %)**16**|(% style="width:157px" %)**IN_1**|(% style="width:326px" %)Discrete input #1 “dry contact” (+5V)
161 +|(% style="width:98px" %)**8**|(% style="width:157px" %)**GND_1**|(% style="width:326px" %)Discrete input #1 “dry contact” (ground)
162 +|(% style="width:98px" %)**15**|(% style="width:157px" %)**IN_2**|(% style="width:326px" %)Discrete input #2 “dry contact” (+5V)
163 +|(% style="width:98px" %)**7**|(% style="width:157px" %)**GND_2**|(% style="width:326px" %)Discrete input #2 “dry contact” (ground)
164 +|(% style="width:98px" %)**14**|(% style="width:157px" %)**IN_3**|(% style="width:326px" %)Discrete input #3 “dry contact” (+5V)
165 +|(% style="width:98px" %)**6**|(% style="width:157px" %)**GND_3**|(% style="width:326px" %)Discrete input #3 “dry contact” (ground)
166 +|(% style="width:98px" %)**13**|(% style="width:157px" %)**IN_4**|(% style="width:326px" %)Discrete input #4 “dry contact” (+5V)
167 +|(% style="width:98px" %)**5**|(% style="width:157px" %)**GND_4**|(% style="width:326px" %)Discrete input #4 “dry contact” (ground)
168 +|(% style="width:98px" %)**12**|(% style="width:157px" %)**OUT_4**|(% style="width:326px" %)Discrete output #4 (+5V, 20mA)
169 +|(% style="width:98px" %)**4**|(% style="width:157px" %)**GND_OUT_4**|(% style="width:326px" %)Discrete output #4 (ground)
170 +|(% style="width:98px" %)**11**|(% style="width:157px" %)**OUT_3**|(% style="width:326px" %)Discrete output #3 (+5V, 20mA)
171 +|(% style="width:98px" %)**3**|(% style="width:157px" %)**GND_OUT_3**|(% style="width:326px" %)Discrete output #3 (ground)
172 +|(% style="width:98px" %)**10**|(% style="width:157px" %)**OUT_2**|(% style="width:326px" %)Discrete output #2 (+5V, 20mA)
173 +|(% style="width:98px" %)**2**|(% style="width:157px" %)**GND_OUT_2**|(% style="width:326px" %)Discrete output #2 (ground)
174 +|(% style="width:98px" %)**9**|(% style="width:157px" %)**OUT_1**|(% style="width:326px" %)Discrete output #1 (+5V, 20mA)
175 +|(% style="width:98px" %)**1**|(% style="width:157px" %)**GND_OUT_1**|(% style="width:326px" %)Discrete output #1 (ground)
176 +
177 += 2.4 Indicators =
178 +
179 +=== 2.4.1 DS1 – power indicator ===
180 +
181 +(% style="width:442px" %)
182 +|(% style="width:138px" %)**State**|(% style="width:301px" %)**Description**
183 +|(% style="width:138px" %)**Lights red**|(% style="width:301px" %)The device is powered
184 +|(% style="width:138px" %)**Off**|(% style="width:301px" %)The device is not powered
185 +
186 +=== 2.4.2 DS2 – operation indicator ===
187 +
188 +(% style="width:442px" %)
189 +|(% style="width:137px" %)**State**|(% style="width:302px" %)**Description**
190 +|(% style="width:137px" %)**Blinking green**|(% style="width:302px" %)The BMS firmware is running
191 +|(% style="width:137px" %)**Off**|(% style="width:302px" %)The BMS firmware is not running
192 +
193 +=== 2.4.3 DS3 – communication indicator ===
194 +
195 +(% style="width:539px" %)
196 +|(% style="width:175px" %)**State**|(% style="width:361px" %)**Description**
197 +|(% style="width:175px" %)**Blinking yellow (2Hz)**|(% style="width:361px" %)Initializing communication with BMS Logic boards
198 +|(% style="width:175px" %)**Blinking yellow (25Hz)**|(% style="width:361px" %)Communication with BMS Logic is established
199 +
200 +=== 2.4.4 DS4 – error indicator ===
201 +
202 +(% style="width:539px" %)
203 +|(% style="width:176px" %)**State**|(% style="width:360px" %)**Description**
204 +|(% style="width:176px" %)**Blinking red**|(% style="width:360px" %)Errors in communication with BMS Logic
205 +
206 +=== 2.4.5 DS7 – relay 1 indicator ===
207 +
208 +(% style="width:541px" %)
209 +|(% style="width:179px" %)**State**|(% style="width:359px" %)**Description**
210 +|(% style="width:179px" %)**Lights green**|(% style="width:359px" %)Relay #1 is closed
211 +|(% style="width:179px" %)**Off**|(% style="width:359px" %)Relay #1 is opened
212 +
213 +=== 2.4.6 DS8 – relay 2 indicator ===
214 +
215 +(% style="width:542px" %)
216 +|(% style="width:180px" %)**State**|(% style="width:359px" %)**Description**
217 +|(% style="width:180px" %)**Lights green**|(% style="width:359px" %)Relay #2 is closed
218 +|(% style="width:180px" %)**Off**|(% style="width:359px" %)Relay #2 is opened
219 +
220 +=== 2.4.7 DS5 – relay 3 indicator ===
221 +
222 +(% style="width:542px" %)
223 +|(% style="width:183px" %)**State**|(% style="width:356px" %)**Description**
224 +|(% style="width:183px" %)**Lights green**|(% style="width:356px" %)Relay #3 is closed
225 +|(% style="width:183px" %)**Off**|(% style="width:356px" %)Relay #3 is opened
226 +
227 +=== 2.4.8 DS6 – relay 4 indicator ===
228 +
229 +(% style="width:542px" %)
230 +|(% style="width:187px" %)**State**|(% style="width:352px" %)**Description**
231 +|(% style="width:187px" %)**Lights green**|(% style="width:352px" %)Relay #4 is closed
232 +|(% style="width:187px" %)**Off**|(% style="width:352px" %)Relay #4 is opened
233 +
234 +
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