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Wiki source code of 2. Installation and connection

Version 58.1 by Admin on 2025/03/10 15:13
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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 === 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 3A)
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,
117 up to 8A (board rev. 2.1b), up to 3A (board rev. 2.1c)
118 |**2**|**NO**|Normally open contact
119
120 === P7 – header of relay 4 ===
121
122 Receptacle Housing: Molex 39012020. Terminals: Molex 5556
123
124 [[image:1732198827034-560.png||data-xwiki-image-style-alignment="center" height="78" width="41"]]
125
126 By default, relay 4 is used to control the heater.
127
128 |**Pin**|**Name**|**Description**
129 |**1**|**V+**|Switching voltage up to 55V,
130 up to 8A (board rev. 2.1b), up to 3A (board rev. 2.1c)
131 |**2**|**NO**|Normally open contact
132
133 === P14 – header for CAN and RS-485 interfaces ===
134
135 Receptacle Housing: Molex 430250600. Terminals: Molex 43030
136
137 [[image:1731517180930-597.png||data-xwiki-image-style-alignment="center" height="81" width="113"]]
138
139 (% style="width:641px" %)
140 |**Pin**|**Name**|**Description**
141 |**1**|**EXT_RS485_A**|RS-485 line A for communication with external equipment
142 |**2**|**CAN_H**|CAN H line for communication with external equipment
143 |**3**|**+5V_CAN**|Supply voltage 5V for external devices, max 200 mA
144 |**4**|**EXT_RS485_B**|RS-485 line B for communication with external equipment
145 |**5**|**CAN_L**|CAN L line for communication with external equipment
146 |**6**|**GND_CAN**|Ground
147
148 === P21 – CAN termination resistor jumper ===
149
150 [[image:1731517188900-976.png||data-xwiki-image-style-alignment="center" height="78" width="149"]]
151
152 To connect the termination resistor between the lines **CAN_H** and **CAN_L**, install a jumper, according to the P21 pinout:
153
154 |**Pin**|**Name**|**Description**
155 |**1-2**|**120 Ohm**|Termination resistor 120 Ohm is connected
156 |**2-3**|**-**|Termination resistor 120 Ohm is not connected
157
158 === P22 - RS-485 termination resistor jumper ===
159
160 [[image:1731517195672-298.png||data-xwiki-image-style-alignment="center" height="81" width="155"]]
161
162 To connect the termination resistor between the **EXT_RS485_A** and **EXT_RS485_B** lines, install a jumper according to the P22 pinout:
163
164 |**Pin**|**Name**|**Description**
165 |**1-2**|**120 Ohm**|Terminating resistor 120 Ohm is connected
166 |**2-3**|**-**|Terminating resistor 120 Ohm is not connected
167
168 === P11 – header for discrete inputs/outputs ===
169
170 Receptacle Housing: Molex 430251600. Terminals: Molex 43030
171
172 [[image:1732198937514-731.png||data-xwiki-image-style-alignment="center" height="85" width="272"]]
173
174 |**Pin**|**Name**|**Description**
175 |**16**|**IN_1**|Discrete input #1 “dry contact” (+5V)
176 |**8**|**GND_1**|Discrete input #1 “dry contact” (ground)
177 |**15**|**IN_2**|Discrete input #2 “dry contact” (+5V)
178 |**7**|**GND_2**|Discrete input #2 “dry contact” (ground)
179 |**14**|**IN_3**|Discrete input #3 “dry contact” (+5V)
180 |**6**|**GND_3**|Discrete input #3 “dry contact” (ground)
181 |**13**|**IN_4**|Discrete input #4 “dry contact” (+5V)
182 |**5**|**GND_4**|Discrete input #4 “dry contact” (ground)
183 |**12**|**OUT_4**|Discrete output #4 (+5V, 20mA)
184 |**4**|**GND_OUT_4**|Discrete output #4 (ground)
185 |**11**|**OUT_3**|Discrete output #3 (+5V, 20mA)
186 |**3**|**GND_OUT_3**|Discrete output #3 (ground)
187 |**10**|**OUT_2**|Discrete output #2 (+5V, 20mA)
188 |**2**|**GND_OUT_2**|Discrete output #2 (ground)
189 |**9**|**OUT_1**|Discrete output #1 (+5V, 20mA)
190 |**1**|**GND_OUT_1**|Discrete output #1 (ground)
191
192 == Indicators ==
193
194 === DS1 – power indicator ===
195
196 |**State**|**Description**
197 |**Lights red**|The device is powered
198 |**Off**|The device is not powered
199
200 === DS2 – operation indicator ===
201
202 |**State**|**Description**
203 |**Blinking green**|The BMS firmware is running
204 |**Off**|The BMS firmware is not running
205
206 === DS3 – communication indicator ===
207
208 |**State**|**Description**
209 |**Blinking yellow (2Hz)**|Initializing communication with BMS Logic boards
210 |**Blinking yellow (25Hz)**|Communication with BMS Logic is established
211
212 === DS4 – error indicator ===
213
214
215 |(**State**|**Description**
216 |(**Blinking red**|Errors in communication with BMS Logic
217
218 === DS7 – relay 1 indicator ===
219
220 |**State**|**Description**
221 |**Lights green**|Relay #1 is closed
222 |**Off**|Relay #1 is opened
223
224 === DS8 – relay 2 indicator ===
225
226 |**State**|**Description**
227 |**Lights green**|Relay #2 is closed
228 |**Off**|Relay #2 is opened
229
230 === DS5 – relay 3 indicator ===
231
232 |**State**|**Description**
233 |**Lights green**|Relay #3 is closed
234 |**Off**|Relay #3 is opened
235
236 === DS6 – relay 4 indicator ===
237
238 |**State**|**Description**
239 |**Lights green**|Relay #4 is closed
240 |**Off**|Relay #4 is opened
241
242