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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 +== 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  
7 -== P1 – header for power supply ==
47 +(% class="box warningmessage" %)
48 +(((
49 +**Attention!**
50 +All headers are shown from the device side!
51 +)))
8 8  
9 -[[image:1731516593096-166.png||data-xwiki-image-style-alignment="center" height="93" width="49"]]
53 +=== P1 – header for power supply ===
10 10  
55 +Receptacle Housing: Molex 39012020. Terminals: Molex 5556
56 +
57 +[[image:1732198827034-560.png||data-xwiki-image-style-alignment="center" height="78" width="41"]]
58 +
11 11  |**Pin**|**Name**|**Description**
12 12  |**1**|**GND**|Ground
13 13  |**2**|**V+**|Supply voltage 9-30V
14 14  
15 -== P15 – header for BMS Logic ==
63 +=== P15 – header for BMS Logic ===
16 16  
17 -[[image:1731516577472-301.png||data-xwiki-image-style-alignment="center" height="90" width="83"]]
65 +Receptacle Housing: Molex 430250400. Terminals: Molex 43030
18 18  
19 -|**1**|**RS485_A**|**RS-485 line A for communication with BMS Logic**
67 +[[image:1732198890482-787.png||data-xwiki-image-style-alignment="center" height="77" width="71"]]
68 +
69 +|**Pin**|**Name**|**Description**
70 +|**1**|**RS485_A**|RS-485 line A for communication with BMS Logic
20 20  |**2**|**RS485_B**|RS-485 line B for communication with BMS Logic
21 21  |**3**|**+5V**|Supply voltage for BMS Logic
22 22  |**4**|**GND**|Ground
74 +
75 +=== P12 – header for current sensor ===
76 +
77 +Receptacle Housing: Molex 430250400. Terminals: Molex 43030
78 +
79 +[[image:1732198890482-787.png||data-xwiki-image-style-alignment="center" height="77" width="71"]]
80 +
81 +|**Pin**|**Name**|**Description**
82 +|**1**|**+5V**|Supply voltage for the current sensor 5V, max 50 mA
83 +|**2**|**GND**|Ground
84 +|**3**|**Vcs**|ADC input (current sensor output)
85 +|**4**|**Vref**|ADC input (current sensor reference signal)
86 +
87 +=== P13 – header for humidity sensor ===
88 +
89 +Receptacle Housing: Molex 430250400. Terminals: Molex 43030
90 +
91 +[[image:1732198896526-660.png||data-xwiki-image-style-alignment="center" height="70" width="64"]]
92 +
93 +|**Pin**|**Name**|**Description**
94 +|**1**|**+5V**|Supply voltage 5 V, max 50 mA
95 +|**2**|**GND**|Ground
96 +|**3**|**Vhs**|ADC input (humidity sensor output)
97 +|**4**|**Vts**|ADC input (temperature sensor output)
98 +
99 +=== P8 – header of relay 1 ===
100 +
101 +Receptacle Housing: Molex 39012020. Terminals: Molex 5556
102 +
103 +[[image:1732198827034-560.png||data-xwiki-image-style-alignment="center" height="78" width="41"]]
104 +
105 +By default, relay 1 is used to control the discharging contactor.
106 +
107 +|**Pin**|**Name**|**Description**
108 +|**1**|**V+**|Switching voltage (up to 55V, max 3A)
109 +|**2**|**NO**|Normally open contact
110 +
111 +Contactor connection example for all relays:
112 +
113 +[[image:1741619814065-850.png||height="189" width="252"]]
114 +
115 +=== P9 – header of relay 2 ===
116 +
117 +Receptacle Housing: Molex 39012020. Terminals: Molex 5556
118 +
119 +[[image:1732198827034-560.png||data-xwiki-image-style-alignment="center" height="78" width="41"]]
120 +
121 +By default, relay 2 is used to output the “Allow charging” signal.
122 +
123 +|**Pin**|**Name**|**Description**
124 +|**1**|**V+**|Switching voltage (up to 55V, max 3A)
125 +|**2**|**NO**|Normally open contact
126 +
127 +Contactor connection example: see relay 1.
128 +
129 +=== P6 – header of relay 3 ===
130 +
131 +Receptacle Housing: Molex 39012020. Terminals: Molex 5556
132 +
133 +[[image:1732198827034-560.png||data-xwiki-image-style-alignment="center" height="78" width="41"]]
134 +
135 +By default, relay 3 is used to control the charging contactor.
136 +
137 +|**Pin**|**Name**|**Description**
138 +|**1**|**V+**|Switching voltage up to 55V,
139 +up to 8A (board rev. 2.1b), up to 3A (board rev. 2.1c)
140 +|**2**|**NO**|Normally open contact
141 +
142 +Contactor connection example: see relay 1.
143 +
144 +=== P7 – header of relay 4 ===
145 +
146 +Receptacle Housing: Molex 39012020. Terminals: Molex 5556
147 +
148 +[[image:1732198827034-560.png||data-xwiki-image-style-alignment="center" height="78" width="41"]]
149 +
150 +By default, relay 4 is used to control the heater.
151 +
152 +|**Pin**|**Name**|**Description**
153 +|**1**|**V+**|Switching voltage up to 55V,
154 +up to 8A (board rev. 2.1b), up to 3A (board rev. 2.1c)
155 +|**2**|**NO**|Normally open contact
156 +
157 +Contactor connection example: see relay 1.
158 +
159 +=== P14 – header for CAN and RS-485 interfaces ===
160 +
161 +Receptacle Housing: Molex 430250600. Terminals: Molex 43030
162 +
163 +[[image:1731517180930-597.png||data-xwiki-image-style-alignment="center" height="81" width="113"]]
164 +
165 +(% style="width:641px" %)
166 +|**Pin**|**Name**|**Description**
167 +|**1**|**EXT_RS485_A**|RS-485 line A for communication with external equipment
168 +|**2**|**CAN_H**|CAN H line for communication with external equipment
169 +|**3**|**+5V_CAN**|Supply voltage 5V for external devices, max 200 mA
170 +|**4**|**EXT_RS485_B**|RS-485 line B for communication with external equipment
171 +|**5**|**CAN_L**|CAN L line for communication with external equipment
172 +|**6**|**GND_CAN**|Ground
173 +
174 +=== P21 – CAN termination resistor jumper ===
175 +
176 +[[image:1731517188900-976.png||data-xwiki-image-style-alignment="center" height="78" width="149"]]
177 +
178 +To connect the termination resistor between the lines **CAN_H** and **CAN_L**, install a jumper, according to the P21 pinout:
179 +
180 +|**Pin**|**Name**|**Description**
181 +|**1-2**|**120 Ohm**|Termination resistor 120 Ohm is connected
182 +|**2-3**|**-**|Termination resistor 120 Ohm is not connected
183 +
184 +=== P22 - RS-485 termination resistor jumper ===
185 +
186 +[[image:1731517195672-298.png||data-xwiki-image-style-alignment="center" height="81" width="155"]]
187 +
188 +To connect the termination resistor between the **EXT_RS485_A** and **EXT_RS485_B** lines, install a jumper according to the P22 pinout:
189 +
190 +|**Pin**|**Name**|**Description**
191 +|**1-2**|**120 Ohm**|Terminating resistor 120 Ohm is connected
192 +|**2-3**|**-**|Terminating resistor 120 Ohm is not connected
193 +
194 +=== P11 – header for discrete inputs/outputs ===
195 +
196 +Receptacle Housing: Molex 430251600. Terminals: Molex 43030
197 +
198 +[[image:1732198937514-731.png||data-xwiki-image-style-alignment="center" height="85" width="272"]]
199 +
200 +|**Pin**|**Name**|**Description**
201 +|**16**|**IN_1**|Discrete input #1 “dry contact” (+5V)
202 +|**8**|**GND_1**|Discrete input #1 “dry contact” (ground)
203 +|**15**|**IN_2**|Discrete input #2 “dry contact” (+5V)
204 +|**7**|**GND_2**|Discrete input #2 “dry contact” (ground)
205 +|**14**|**IN_3**|Discrete input #3 “dry contact” (+5V)
206 +|**6**|**GND_3**|Discrete input #3 “dry contact” (ground)
207 +|**13**|**IN_4**|Discrete input #4 “dry contact” (+5V)
208 +|**5**|**GND_4**|Discrete input #4 “dry contact” (ground)
209 +|**12**|**OUT_4**|Discrete output #4 (+5V, 20mA)
210 +|**4**|**GND_OUT_4**|Discrete output #4 (ground)
211 +|**11**|**OUT_3**|Discrete output #3 (+5V, 20mA)
212 +|**3**|**GND_OUT_3**|Discrete output #3 (ground)
213 +|**10**|**OUT_2**|Discrete output #2 (+5V, 20mA)
214 +|**2**|**GND_OUT_2**|Discrete output #2 (ground)
215 +|**9**|**OUT_1**|Discrete output #1 (+5V, 20mA)
216 +|**1**|**GND_OUT_1**|Discrete output #1 (ground)
217 +
218 +== Indicators ==
219 +
220 +=== DS1 – power indicator ===
221 +
222 +|**State**|**Description**
223 +|**Lights red**|The device is powered
224 +|**Off**|The device is not powered
225 +
226 +=== DS2 – operation indicator ===
227 +
228 +|**State**|**Description**
229 +|**Blinking green**|The BMS firmware is running
230 +|**Off**|The BMS firmware is not running
231 +
232 +=== DS3 – communication indicator ===
233 +
234 +|**State**|**Description**
235 +|**Blinking yellow (2Hz)**|Initializing communication with BMS Logic boards
236 +|**Blinking yellow (25Hz)**|Communication with BMS Logic is established
237 +
238 +=== DS4 – error indicator ===
239 +
240 +
241 +|(**State**|**Description**
242 +|(**Blinking red**|Errors in communication with BMS Logic
243 +
244 +=== DS7 – relay 1 indicator ===
245 +
246 +|**State**|**Description**
247 +|**Lights green**|Relay #1 is closed
248 +|**Off**|Relay #1 is opened
249 +
250 +=== DS8 – relay 2 indicator ===
251 +
252 +|**State**|**Description**
253 +|**Lights green**|Relay #2 is closed
254 +|**Off**|Relay #2 is opened
255 +
256 +=== DS5 – relay 3 indicator ===
257 +
258 +|**State**|**Description**
259 +|**Lights green**|Relay #3 is closed
260 +|**Off**|Relay #3 is opened
261 +
262 +=== DS6 – relay 4 indicator ===
263 +
264 +|**State**|**Description**
265 +|**Lights green**|Relay #4 is closed
266 +|**Off**|Relay #4 is opened
267 +
268 +
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