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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 Contactor connection example:
96
97 [[image:1741619700532-367.png||height="184" width="246"]]
98
99 === P9 – header of relay 2 ===
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 2 is used to output the “Allow charging” signal.
106
107 |**Pin**|**Name**|**Description**
108 |**1**|**V+**|Switching voltage (up to 55V, max 3A)
109 |**2**|**NO**|Normally open contact
110
111 === P6 – header of relay 3 ===
112
113 Receptacle Housing: Molex 39012020. Terminals: Molex 5556
114
115 [[image:1732198827034-560.png||data-xwiki-image-style-alignment="center" height="78" width="41"]]
116
117 By default, relay 3 is used to control the charging contactor.
118
119 |**Pin**|**Name**|**Description**
120 |**1**|**V+**|Switching voltage up to 55V,
121 up to 8A (board rev. 2.1b), up to 3A (board rev. 2.1c)
122 |**2**|**NO**|Normally open contact
123
124 === P7 – header of relay 4 ===
125
126 Receptacle Housing: Molex 39012020. Terminals: Molex 5556
127
128 [[image:1732198827034-560.png||data-xwiki-image-style-alignment="center" height="78" width="41"]]
129
130 By default, relay 4 is used to control the heater.
131
132 |**Pin**|**Name**|**Description**
133 |**1**|**V+**|Switching voltage up to 55V,
134 up to 8A (board rev. 2.1b), up to 3A (board rev. 2.1c)
135 |**2**|**NO**|Normally open contact
136
137 === P14 – header for CAN and RS-485 interfaces ===
138
139 Receptacle Housing: Molex 430250600. Terminals: Molex 43030
140
141 [[image:1731517180930-597.png||data-xwiki-image-style-alignment="center" height="81" width="113"]]
142
143 (% style="width:641px" %)
144 |**Pin**|**Name**|**Description**
145 |**1**|**EXT_RS485_A**|RS-485 line A for communication with external equipment
146 |**2**|**CAN_H**|CAN H line for communication with external equipment
147 |**3**|**+5V_CAN**|Supply voltage 5V for external devices, max 200 mA
148 |**4**|**EXT_RS485_B**|RS-485 line B for communication with external equipment
149 |**5**|**CAN_L**|CAN L line for communication with external equipment
150 |**6**|**GND_CAN**|Ground
151
152 === P21 – CAN termination resistor jumper ===
153
154 [[image:1731517188900-976.png||data-xwiki-image-style-alignment="center" height="78" width="149"]]
155
156 To connect the termination resistor between the lines **CAN_H** and **CAN_L**, install a jumper, according to the P21 pinout:
157
158 |**Pin**|**Name**|**Description**
159 |**1-2**|**120 Ohm**|Termination resistor 120 Ohm is connected
160 |**2-3**|**-**|Termination resistor 120 Ohm is not connected
161
162 === P22 - RS-485 termination resistor jumper ===
163
164 [[image:1731517195672-298.png||data-xwiki-image-style-alignment="center" height="81" width="155"]]
165
166 To connect the termination resistor between the **EXT_RS485_A** and **EXT_RS485_B** lines, install a jumper according to the P22 pinout:
167
168 |**Pin**|**Name**|**Description**
169 |**1-2**|**120 Ohm**|Terminating resistor 120 Ohm is connected
170 |**2-3**|**-**|Terminating resistor 120 Ohm is not connected
171
172 === P11 – header for discrete inputs/outputs ===
173
174 Receptacle Housing: Molex 430251600. Terminals: Molex 43030
175
176 [[image:1732198937514-731.png||data-xwiki-image-style-alignment="center" height="85" width="272"]]
177
178 |**Pin**|**Name**|**Description**
179 |**16**|**IN_1**|Discrete input #1 “dry contact” (+5V)
180 |**8**|**GND_1**|Discrete input #1 “dry contact” (ground)
181 |**15**|**IN_2**|Discrete input #2 “dry contact” (+5V)
182 |**7**|**GND_2**|Discrete input #2 “dry contact” (ground)
183 |**14**|**IN_3**|Discrete input #3 “dry contact” (+5V)
184 |**6**|**GND_3**|Discrete input #3 “dry contact” (ground)
185 |**13**|**IN_4**|Discrete input #4 “dry contact” (+5V)
186 |**5**|**GND_4**|Discrete input #4 “dry contact” (ground)
187 |**12**|**OUT_4**|Discrete output #4 (+5V, 20mA)
188 |**4**|**GND_OUT_4**|Discrete output #4 (ground)
189 |**11**|**OUT_3**|Discrete output #3 (+5V, 20mA)
190 |**3**|**GND_OUT_3**|Discrete output #3 (ground)
191 |**10**|**OUT_2**|Discrete output #2 (+5V, 20mA)
192 |**2**|**GND_OUT_2**|Discrete output #2 (ground)
193 |**9**|**OUT_1**|Discrete output #1 (+5V, 20mA)
194 |**1**|**GND_OUT_1**|Discrete output #1 (ground)
195
196 == Indicators ==
197
198 === DS1 – power indicator ===
199
200 |**State**|**Description**
201 |**Lights red**|The device is powered
202 |**Off**|The device is not powered
203
204 === DS2 – operation indicator ===
205
206 |**State**|**Description**
207 |**Blinking green**|The BMS firmware is running
208 |**Off**|The BMS firmware is not running
209
210 === DS3 – communication indicator ===
211
212 |**State**|**Description**
213 |**Blinking yellow (2Hz)**|Initializing communication with BMS Logic boards
214 |**Blinking yellow (25Hz)**|Communication with BMS Logic is established
215
216 === DS4 – error indicator ===
217
218
219 |(**State**|**Description**
220 |(**Blinking red**|Errors in communication with BMS Logic
221
222 === DS7 – relay 1 indicator ===
223
224 |**State**|**Description**
225 |**Lights green**|Relay #1 is closed
226 |**Off**|Relay #1 is opened
227
228 === DS8 – relay 2 indicator ===
229
230 |**State**|**Description**
231 |**Lights green**|Relay #2 is closed
232 |**Off**|Relay #2 is opened
233
234 === DS5 – relay 3 indicator ===
235
236 |**State**|**Description**
237 |**Lights green**|Relay #3 is closed
238 |**Off**|Relay #3 is opened
239
240 === DS6 – relay 4 indicator ===
241
242 |**State**|**Description**
243 |**Lights green**|Relay #4 is closed
244 |**Off**|Relay #4 is opened
245
246