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Wiki source code of 2. Installation and connection

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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 =
3
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
27 The BMS Main 2.1 headers are shown in figure below.
28
29 [[image:1731516393377-928.jpeg||alt="1731517946345-632.png" data-xwiki-image-style-alignment="center" height="417" width="451"]]
30
31 (% class="box warningmessage" %)
32 (((
33 **Attention!**
34 All headers are shown from the device side!
35 )))
36
37 === P1 – header for power supply ===
38
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
43 |**Pin**|**Name**|**Description**
44 |**1**|**GND**|Ground
45 |**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 3A)
93 |**2**|**NO**|Normally open contact
94
95 Cont
96
97 === P9 – header of relay 2 ===
98
99 Receptacle Housing: Molex 39012020. Terminals: Molex 5556
100
101 [[image:1732198827034-560.png||data-xwiki-image-style-alignment="center" height="78" width="41"]]
102
103 By default, relay 2 is used to output the “Allow charging” signal.
104
105 |**Pin**|**Name**|**Description**
106 |**1**|**V+**|Switching voltage (up to 55V, max 3A)
107 |**2**|**NO**|Normally open contact
108
109 === P6 – header of relay 3 ===
110
111 Receptacle Housing: Molex 39012020. Terminals: Molex 5556
112
113 [[image:1732198827034-560.png||data-xwiki-image-style-alignment="center" height="78" width="41"]]
114
115 By default, relay 3 is used to control the charging contactor.
116
117 |**Pin**|**Name**|**Description**
118 |**1**|**V+**|Switching voltage up to 55V,
119 up to 8A (board rev. 2.1b), up to 3A (board rev. 2.1c)
120 |**2**|**NO**|Normally open contact
121
122 === P7 – header of relay 4 ===
123
124 Receptacle Housing: Molex 39012020. Terminals: Molex 5556
125
126 [[image:1732198827034-560.png||data-xwiki-image-style-alignment="center" height="78" width="41"]]
127
128 By default, relay 4 is used to control the heater.
129
130 |**Pin**|**Name**|**Description**
131 |**1**|**V+**|Switching voltage up to 55V,
132 up to 8A (board rev. 2.1b), up to 3A (board rev. 2.1c)
133 |**2**|**NO**|Normally open contact
134
135 === P14 – header for CAN and RS-485 interfaces ===
136
137 Receptacle Housing: Molex 430250600. Terminals: Molex 43030
138
139 [[image:1731517180930-597.png||data-xwiki-image-style-alignment="center" height="81" width="113"]]
140
141 (% style="width:641px" %)
142 |**Pin**|**Name**|**Description**
143 |**1**|**EXT_RS485_A**|RS-485 line A for communication with external equipment
144 |**2**|**CAN_H**|CAN H line for communication with external equipment
145 |**3**|**+5V_CAN**|Supply voltage 5V for external devices, max 200 mA
146 |**4**|**EXT_RS485_B**|RS-485 line B for communication with external equipment
147 |**5**|**CAN_L**|CAN L line for communication with external equipment
148 |**6**|**GND_CAN**|Ground
149
150 === P21 – CAN termination resistor jumper ===
151
152 [[image:1731517188900-976.png||data-xwiki-image-style-alignment="center" height="78" width="149"]]
153
154 To connect the termination resistor between the lines **CAN_H** and **CAN_L**, install a jumper, according to the P21 pinout:
155
156 |**Pin**|**Name**|**Description**
157 |**1-2**|**120 Ohm**|Termination resistor 120 Ohm is connected
158 |**2-3**|**-**|Termination resistor 120 Ohm is not connected
159
160 === P22 - RS-485 termination resistor jumper ===
161
162 [[image:1731517195672-298.png||data-xwiki-image-style-alignment="center" height="81" width="155"]]
163
164 To connect the termination resistor between the **EXT_RS485_A** and **EXT_RS485_B** lines, install a jumper according to the P22 pinout:
165
166 |**Pin**|**Name**|**Description**
167 |**1-2**|**120 Ohm**|Terminating resistor 120 Ohm is connected
168 |**2-3**|**-**|Terminating resistor 120 Ohm is not connected
169
170 === P11 – header for discrete inputs/outputs ===
171
172 Receptacle Housing: Molex 430251600. Terminals: Molex 43030
173
174 [[image:1732198937514-731.png||data-xwiki-image-style-alignment="center" height="85" width="272"]]
175
176 |**Pin**|**Name**|**Description**
177 |**16**|**IN_1**|Discrete input #1 “dry contact” (+5V)
178 |**8**|**GND_1**|Discrete input #1 “dry contact” (ground)
179 |**15**|**IN_2**|Discrete input #2 “dry contact” (+5V)
180 |**7**|**GND_2**|Discrete input #2 “dry contact” (ground)
181 |**14**|**IN_3**|Discrete input #3 “dry contact” (+5V)
182 |**6**|**GND_3**|Discrete input #3 “dry contact” (ground)
183 |**13**|**IN_4**|Discrete input #4 “dry contact” (+5V)
184 |**5**|**GND_4**|Discrete input #4 “dry contact” (ground)
185 |**12**|**OUT_4**|Discrete output #4 (+5V, 20mA)
186 |**4**|**GND_OUT_4**|Discrete output #4 (ground)
187 |**11**|**OUT_3**|Discrete output #3 (+5V, 20mA)
188 |**3**|**GND_OUT_3**|Discrete output #3 (ground)
189 |**10**|**OUT_2**|Discrete output #2 (+5V, 20mA)
190 |**2**|**GND_OUT_2**|Discrete output #2 (ground)
191 |**9**|**OUT_1**|Discrete output #1 (+5V, 20mA)
192 |**1**|**GND_OUT_1**|Discrete output #1 (ground)
193
194 == Indicators ==
195
196 === DS1 – power indicator ===
197
198 |**State**|**Description**
199 |**Lights red**|The device is powered
200 |**Off**|The device is not powered
201
202 === DS2 – operation indicator ===
203
204 |**State**|**Description**
205 |**Blinking green**|The BMS firmware is running
206 |**Off**|The BMS firmware is not running
207
208 === DS3 – communication indicator ===
209
210 |**State**|**Description**
211 |**Blinking yellow (2Hz)**|Initializing communication with BMS Logic boards
212 |**Blinking yellow (25Hz)**|Communication with BMS Logic is established
213
214 === DS4 – error indicator ===
215
216
217 |(**State**|**Description**
218 |(**Blinking red**|Errors in communication with BMS Logic
219
220 === DS7 – relay 1 indicator ===
221
222 |**State**|**Description**
223 |**Lights green**|Relay #1 is closed
224 |**Off**|Relay #1 is opened
225
226 === DS8 – relay 2 indicator ===
227
228 |**State**|**Description**
229 |**Lights green**|Relay #2 is closed
230 |**Off**|Relay #2 is opened
231
232 === DS5 – relay 3 indicator ===
233
234 |**State**|**Description**
235 |**Lights green**|Relay #3 is closed
236 |**Off**|Relay #3 is opened
237
238 === DS6 – relay 4 indicator ===
239
240 |**State**|**Description**
241 |**Lights green**|Relay #4 is closed
242 |**Off**|Relay #4 is opened
243
244