Skip to Content

Wiki source code of 2. Installation and connection

Version 54.1 by Admin on 2025/02/06 11:38
Show last authors
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 |Headers P1, P6-P9 type |(% style="width:178px" %)Molex series Mini-Fit
16 |Headers P11-P15 type |(% style="width:178px" %)Molex series Micro-Fit
17
18 == Connection procedure ==
19
20 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.
21
22 1. Connect the charging and discharging contactors to the P6-P9 headers.
23 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.
24 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.
25 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.
26
27 == ​​​​Headers description ==
28
29 The BMS Main 2.1 headers are shown in figure below.
30
31 [[image:1731516393377-928.jpeg||alt="1731517946345-632.png" data-xwiki-image-style-alignment="center" height="417" width="451"]]
32
33 (% class="box warningmessage" %)
34 (((
35 **Attention!**
36 All headers are shown from the device side!
37 )))
38
39 === P1 – header for power supply ===
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 [[image:1732198890482-787.png||data-xwiki-image-style-alignment="center" height="77" width="71"]]
50
51 |**Pin**|**Name**|**Description**
52 |**1**|**RS485_A**|RS-485 line A for communication with BMS Logic
53 |**2**|**RS485_B**|RS-485 line B for communication with BMS Logic
54 |**3**|**+5V**|Supply voltage for BMS Logic
55 |**4**|**GND**|Ground
56
57 === P12 – header for current sensor ===
58
59 [[image:1732198890482-787.png||data-xwiki-image-style-alignment="center" height="77" width="71"]]
60
61 |**Pin**|**Name**|**Description**
62 |**1**|**+5V**|Supply voltage for the current sensor 5V, max 50 mA
63 |**2**|**GND**|Ground
64 |**3**|**Vcs**|ADC input (current sensor output)
65 |**4**|**Vref**|ADC input (current sensor reference signal)
66
67 === P13 – header for humidity sensor ===
68
69 [[image:1732198896526-660.png||data-xwiki-image-style-alignment="center" height="70" width="64"]]
70
71 |**Pin**|**Name**|**Description**
72 |**1**|**+5V**|Supply voltage 5 V, max 50 mA
73 |**2**|**GND**|Ground
74 |**3**|**Vhs**|ADC input (humidity sensor output)
75 |**4**|**Vts**|ADC input (temperature sensor output)
76
77 === P8 – header of relay 1 ===
78
79 [[image:1732198827034-560.png||data-xwiki-image-style-alignment="center" height="78" width="41"]]
80
81 By default, relay 1 is used to control the discharging contactor.
82
83 |**Pin**|**Name**|**Description**
84 |**1**|**V+**|Switching voltage (up to 55V, max 2A)
85 |**2**|**NO**|Normally open contact
86
87 === P9 – header of relay 2 ===
88
89 [[image:1732198827034-560.png||data-xwiki-image-style-alignment="center" height="78" width="41"]]
90
91 By default, relay 2 is used to output the “Allow charging” signal.
92
93 |**Pin**|**Name**|**Description**
94 |**1**|**V+**|Switching voltage (up to 55V, max 2A)
95 |**2**|**NO**|Normally open contact
96
97 === P6 – header of relay 3 ===
98
99 [[image:1732198827034-560.png||data-xwiki-image-style-alignment="center" height="78" width="41"]]
100
101 By default, relay 3 is used to control the charging contactor.
102
103 |**Pin**|**Name**|**Description**
104 |**1**|**V+**|Switching voltage (up to 55V, max 8A)
105 |**2**|**NO**|Normally open contact
106
107 === P7 – header of relay 4 ===
108
109 [[image:1732198827034-560.png||data-xwiki-image-style-alignment="center" height="78" width="41"]]
110
111 By default, relay 4 is used to control the heater.
112
113 |**Pin**|**Name**|**Description**
114 |**1**|**V+**|Switching voltage (up to 55V, max 8A)
115 |**2**|**NO**|Normally open contact
116
117 === P14 – header for CAN and RS-485 interfaces ===
118
119 [[image:1731517180930-597.png||data-xwiki-image-style-alignment="center" height="81" width="113"]]
120
121 (% style="width:641px" %)
122 |**Pin**|**Name**|**Description**
123 |**1**|**EXT_RS485_A**|RS-485 line A for communication with external equipment
124 |**2**|**CAN_H**|CAN H line for communication with external equipment
125 |**3**|**+5V_CAN**|Supply voltage 5V for external devices, max 200 mA
126 |**4**|**EXT_RS485_B**|RS-485 line B for communication with external equipment
127 |**5**|**CAN_L**|CAN L line for communication with external equipment
128 |**6**|**GND_CAN**|Ground
129
130 === P21 – CAN termination resistor jumper ===
131
132 [[image:1731517188900-976.png||data-xwiki-image-style-alignment="center" height="78" width="149"]]
133
134 To connect the termination resistor between the lines **CAN_H** and **CAN_L**, install a jumper, according to the P21 pinout:
135
136 |**Pin**|**Name**|**Description**
137 |**1-2**|**120 Ohm**|Termination resistor 120 Ohm is connected
138 |**2-3**|**-**|Termination resistor 120 Ohm is not connected
139
140 === P22 - RS-485 termination resistor jumper ===
141
142 [[image:1731517195672-298.png||data-xwiki-image-style-alignment="center" height="81" width="155"]]
143
144 To connect the termination resistor between the **EXT_RS485_A** and **EXT_RS485_B** lines, install a jumper according to the P22 pinout:
145
146 |**Pin**|**Name**|**Description**
147 |**1-2**|**120 Ohm**|Terminating resistor 120 Ohm is connected
148 |**2-3**|**-**|Terminating resistor 120 Ohm is not connected
149
150 === P11 – header for discrete inputs/outputs ===
151
152 [[image:1732198937514-731.png||data-xwiki-image-style-alignment="center" height="85" width="272"]]
153
154 |**Pin**|**Name**|**Description**
155 |**16**|**IN_1**|Discrete input #1 “dry contact” (+5V)
156 |**8**|**GND_1**|Discrete input #1 “dry contact” (ground)
157 |**15**|**IN_2**|Discrete input #2 “dry contact” (+5V)
158 |**7**|**GND_2**|Discrete input #2 “dry contact” (ground)
159 |**14**|**IN_3**|Discrete input #3 “dry contact” (+5V)
160 |**6**|**GND_3**|Discrete input #3 “dry contact” (ground)
161 |**13**|**IN_4**|Discrete input #4 “dry contact” (+5V)
162 |**5**|**GND_4**|Discrete input #4 “dry contact” (ground)
163 |**12**|**OUT_4**|Discrete output #4 (+5V, 20mA)
164 |**4**|**GND_OUT_4**|Discrete output #4 (ground)
165 |**11**|**OUT_3**|Discrete output #3 (+5V, 20mA)
166 |**3**|**GND_OUT_3**|Discrete output #3 (ground)
167 |**10**|**OUT_2**|Discrete output #2 (+5V, 20mA)
168 |**2**|**GND_OUT_2**|Discrete output #2 (ground)
169 |**9**|**OUT_1**|Discrete output #1 (+5V, 20mA)
170 |**1**|**GND_OUT_1**|Discrete output #1 (ground)
171
172 == Indicators ==
173
174 === DS1 – power indicator ===
175
176 |**State**|**Description**
177 |**Lights red**|The device is powered
178 |**Off**|The device is not powered
179
180 === DS2 – operation indicator ===
181
182 |**State**|**Description**
183 |**Blinking green**|The BMS firmware is running
184 |**Off**|The BMS firmware is not running
185
186 === DS3 – communication indicator ===
187
188 |**State**|**Description**
189 |**Blinking yellow (2Hz)**|Initializing communication with BMS Logic boards
190 |**Blinking yellow (25Hz)**|Communication with BMS Logic is established
191
192 === DS4 – error indicator ===
193
194
195 |(**State**|**Description**
196 |(**Blinking red**|Errors in communication with BMS Logic
197
198 === DS7 – relay 1 indicator ===
199
200 |**State**|**Description**
201 |**Lights green**|Relay #1 is closed
202 |**Off**|Relay #1 is opened
203
204 === DS8 – relay 2 indicator ===
205
206 |**State**|**Description**
207 |**Lights green**|Relay #2 is closed
208 |**Off**|Relay #2 is opened
209
210 === DS5 – relay 3 indicator ===
211
212 |**State**|**Description**
213 |**Lights green**|Relay #3 is closed
214 |**Off**|Relay #3 is opened
215
216 === DS6 – relay 4 indicator ===
217
218 |**State**|**Description**
219 |**Lights green**|Relay #4 is closed
220 |**Off**|Relay #4 is opened
221
222