Skip to Content

Wiki source code of 2. Connection procedure

Version 22.2 by Admin on 2024/11/19 07:59
Show last authors
1 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.
2
3 1. Connect the charging and discharging contactors to the P6-P9 headers.
4 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.
5 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.
6 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.
7
8 = ​​​​Headers description =
9
10 The BMS Main 2.1 headers are shown in figure below.
11
12 [[The BMS Main 2.1 headers>>image:1731517946345-632.png||height="417" width="451"]]
13
14 (% class="wikigeneratedid" %)
15 Following chapters describes the BMS Main 2.1 headers pinout.
16
17 === P1 – header for power supply ===
18
19 [[image:1731516593096-166.png]]
20
21 (% style="width:339px" %)
22 |(% style="width:71px" %)**Pin**|(% style="width:91px" %)**Name**|(% style="width:174px" %)**Description**
23 |(% style="width:71px" %)**1**|(% style="width:91px" %)**GND**|(% style="width:174px" %)Ground
24 |(% style="width:71px" %)**2**|(% style="width:91px" %)**V+**|(% style="width:174px" %)Supply voltage 9-30V
25
26 === P15 – header for BMS Logic ===
27
28 [[image:1731516577472-301.png]]
29
30 (% style="width:524px" %)
31 |(% style="width:69px" %)**Pin**|(% style="width:97px" %)**Name**|(% style="width:355px" %)**Description**
32 |(% style="width:69px" %)**1**|(% style="width:97px" %)**RS485_A**|(% style="width:355px" %)RS-485 line A for communication with BMS Logic
33 |(% style="width:69px" %)**2**|(% style="width:97px" %)**RS485_B**|(% style="width:355px" %)RS-485 line B for communication with BMS Logic
34 |(% style="width:69px" %)**3**|(% style="width:97px" %)**+5V**|(% style="width:355px" %)Supply voltage for BMS Logic
35 |(% style="width:69px" %)**4**|(% style="width:97px" %)**GND**|(% style="width:355px" %)Ground
36
37 === P12 – header for current sensor ===
38
39 [[image:1731516685999-633.png]]
40
41 (% style="width:531px" %)
42 |(% style="width:75px" %)**Pin**|(% style="width:93px" %)**Name**|(% style="width:360px" %)**Description**
43 |(% style="width:75px" %)**1**|(% style="width:93px" %)**+5V**|(% style="width:360px" %)Supply voltage for the current sensor 5V, max 50 mA
44 |(% style="width:75px" %)**2**|(% style="width:93px" %)**GND**|(% style="width:360px" %)Ground
45 |(% style="width:75px" %)**3**|(% style="width:93px" %)**Vcs**|(% style="width:360px" %)ADC input (current sensor output)
46 |(% style="width:75px" %)**4**|(% style="width:93px" %)**Vref**|(% style="width:360px" %)ADC input (current sensor reference signal)
47
48 === P13 – header for humidity sensor ===
49
50 [[image:1731516942455-641.png]]
51
52 (% style="width:531px" %)
53 |(% style="width:77px" %)**Pin**|(% style="width:92px" %)**Name**|(% style="width:359px" %)**Description**
54 |(% style="width:77px" %)**1**|(% style="width:92px" %)**+5V**|(% style="width:359px" %)Supply voltage 5 V, max 50 mA
55 |(% style="width:77px" %)**2**|(% style="width:92px" %)**GND**|(% style="width:359px" %)Ground
56 |(% style="width:77px" %)**3**|(% style="width:92px" %)**Vhs**|(% style="width:359px" %)ADC input (humidity sensor output)
57 |(% style="width:77px" %)**4**|(% style="width:92px" %)**Vts**|(% style="width:359px" %)ADC input (temperature sensor output)
58
59 === P8 – header of relay 1 ===
60
61 [[image:1731517023208-641.png]]
62
63 By default, relay 1 is used to control the discharging contactor.
64
65 (% style="width:527px" %)
66 |(% style="width:82px" %)**Pin**|(% style="width:91px" %)**Name**|(% style="width:351px" %)**Description**
67 |(% style="width:82px" %)**1**|(% style="width:91px" %)**V+**|(% style="width:351px" %)Switching voltage (up to 55V, max 2A)
68 |(% style="width:82px" %)**2**|(% style="width:91px" %)**NO**|(% style="width:351px" %)Normally open contact
69
70 === P9 – header of relay 2 ===
71
72 [[image:1731517025702-799.png]]
73
74 By default, relay 2 is used to output the “Allow charging” signal.
75
76 (% style="width:524px" %)
77 |(% style="width:89px" %)**Pin**|(% style="width:91px" %)**Name**|(% style="width:341px" %)**Description**
78 |(% style="width:89px" %)**1**|(% style="width:91px" %)**V+**|(% style="width:341px" %)Switching voltage (up to 55V, max 2A)
79 |(% style="width:89px" %)**2**|(% style="width:91px" %)**NO**|(% style="width:341px" %)Normally open contact
80
81 === P6 – header of relay 3 ===
82
83 [[image:1731517025702-799.png]]
84
85 By default, relay 3 is used to control the charging contactor.
86
87 (% style="width:524px" %)
88 |(% style="width:101px" %)**Pin**|(% style="width:88px" %)**Name**|(% style="width:332px" %)**Description**
89 |(% style="width:101px" %)**1**|(% style="width:88px" %)**V+**|(% style="width:332px" %)Switching voltage (up to 55V, max 8A)
90 |(% style="width:101px" %)**2**|(% style="width:88px" %)**NO**|(% style="width:332px" %)Normally open contact
91
92 === P7 – header of relay 4 ===
93
94 [[image:1731517025702-799.png]]
95
96 By default, relay 4 is used to control the heater.
97
98 (% style="width:530px" %)
99 |(% style="width:102px" %)**Pin**|(% style="width:93px" %)**Name**|(% style="width:332px" %)**Description**
100 |(% style="width:102px" %)**1**|(% style="width:93px" %)**V+**|(% style="width:332px" %)Switching voltage (up to 55V, max 8A)
101 |(% style="width:102px" %)**2**|(% style="width:93px" %)**NO**|(% style="width:332px" %)Normally open contact
102
103 === P14 – header for CAN and RS-485 interfaces ===
104
105 [[image:1731517180930-597.png]]
106
107 (% style="width:641px" %)
108 |(% style="width:107px" %)**Pin**|(% style="width:127px" %)**Name**|(% style="width:404px" %)**Description**
109 |(% style="width:107px" %)**1**|(% style="width:127px" %)**EXT_RS485_A**|(% style="width:404px" %)RS-485 line A for communication with external equipment
110 |(% style="width:107px" %)**2**|(% style="width:127px" %)**CAN_H**|(% style="width:404px" %)CAN H line for communication with external equipment
111 |(% style="width:107px" %)**3**|(% style="width:127px" %)**+5V_CAN**|(% style="width:404px" %)Supply voltage 5V for external devices, max 200 mA
112 |(% style="width:107px" %)**4**|(% style="width:127px" %)**EXT_RS485_B**|(% style="width:404px" %)RS-485 line B for communication with external equipment
113 |(% style="width:107px" %)**5**|(% style="width:127px" %)**CAN_L**|(% style="width:404px" %)CAN L line for communication with external equipment
114 |(% style="width:107px" %)**6**|(% style="width:127px" %)**GND_CAN**|(% style="width:404px" %)Ground
115
116 === P21 – CAN termination resistor jumper ===
117
118 [[image:1731517188900-976.png]]
119
120 To connect the termination resistor between the lines **CAN_H** and **CAN_L**, install a jumper, according to the P21 pinout:
121
122 (% style="width:643px" %)
123 |**Pin**|(% style="width:122px" %)**Name**|(% style="width:400px" %)**Description**
124 |**1-2**|(% style="width:122px" %)**120 Ohm**|(% style="width:400px" %)Termination resistor 120 Ohm is connected
125 |**2-3**|(% style="width:122px" %)**-**|(% style="width:400px" %)Termination resistor 120 Ohm is not connected
126
127 === P22 - RS-485 termination resistor jumper ===
128
129 [[image:1731517195672-298.png||height="81" width="155"]]
130
131 To connect the termination resistor between the **EXT_RS485_A** and **EXT_RS485_B** lines, install a jumper according to the P22 pinout:
132
133 (% style="width:644px" %)
134 |**Pin**|(% style="width:121px" %)**Name**|(% style="width:402px" %)**Description**
135 |**1-2**|(% style="width:121px" %)**120 Ohm**|(% style="width:402px" %)Terminating resistor 120 Ohm is connected
136 |**2-3**|(% style="width:121px" %)**-**|(% style="width:402px" %)Terminating resistor 120 Ohm is not connected
137
138 === P11 – header for discrete inputs/outputs ===
139
140 [[image:1731517206246-979.png]]
141
142 (% style="width:584px" %)
143 |(% style="width:98px" %)**Pin**|(% style="width:157px" %)**Name**|(% style="width:326px" %)**Description**
144 |(% style="width:98px" %)**16**|(% style="width:157px" %)**IN_1**|(% style="width:326px" %)Discrete input #1 “dry contact” (+5V)
145 |(% style="width:98px" %)**8**|(% style="width:157px" %)**GND_1**|(% style="width:326px" %)Discrete input #1 “dry contact” (ground)
146 |(% style="width:98px" %)**15**|(% style="width:157px" %)**IN_2**|(% style="width:326px" %)Discrete input #2 “dry contact” (+5V)
147 |(% style="width:98px" %)**7**|(% style="width:157px" %)**GND_2**|(% style="width:326px" %)Discrete input #2 “dry contact” (ground)
148 |(% style="width:98px" %)**14**|(% style="width:157px" %)**IN_3**|(% style="width:326px" %)Discrete input #3 “dry contact” (+5V)
149 |(% style="width:98px" %)**6**|(% style="width:157px" %)**GND_3**|(% style="width:326px" %)Discrete input #3 “dry contact” (ground)
150 |(% style="width:98px" %)**13**|(% style="width:157px" %)**IN_4**|(% style="width:326px" %)Discrete input #4 “dry contact” (+5V)
151 |(% style="width:98px" %)**5**|(% style="width:157px" %)**GND_4**|(% style="width:326px" %)Discrete input #4 “dry contact” (ground)
152 |(% style="width:98px" %)**12**|(% style="width:157px" %)**OUT_4**|(% style="width:326px" %)Discrete output #4 (+5V, 20mA)
153 |(% style="width:98px" %)**4**|(% style="width:157px" %)**GND_OUT_4**|(% style="width:326px" %)Discrete output #4 (ground)
154 |(% style="width:98px" %)**11**|(% style="width:157px" %)**OUT_3**|(% style="width:326px" %)Discrete output #3 (+5V, 20mA)
155 |(% style="width:98px" %)**3**|(% style="width:157px" %)**GND_OUT_3**|(% style="width:326px" %)Discrete output #3 (ground)
156 |(% style="width:98px" %)**10**|(% style="width:157px" %)**OUT_2**|(% style="width:326px" %)Discrete output #2 (+5V, 20mA)
157 |(% style="width:98px" %)**2**|(% style="width:157px" %)**GND_OUT_2**|(% style="width:326px" %)Discrete output #2 (ground)
158 |(% style="width:98px" %)**9**|(% style="width:157px" %)**OUT_1**|(% style="width:326px" %)Discrete output #1 (+5V, 20mA)
159 |(% style="width:98px" %)**1**|(% style="width:157px" %)**GND_OUT_1**|(% style="width:326px" %)Discrete output #1 (ground)
160
161 = Indicators =
162
163 === DS1 – power indicator ===
164
165 (% style="width:442px" %)
166 |(% style="width:138px" %)**State**|(% style="width:301px" %)**Description**
167 |(% style="width:138px" %)**Lights red**|(% style="width:301px" %)The device is powered
168 |(% style="width:138px" %)**Off**|(% style="width:301px" %)The device is not powered
169
170 === DS2 – operation indicator ===
171
172 (% style="width:442px" %)
173 |(% style="width:137px" %)**State**|(% style="width:302px" %)**Description**
174 |(% style="width:137px" %)**Blinking green**|(% style="width:302px" %)The BMS firmware is running
175 |(% style="width:137px" %)**Off**|(% style="width:302px" %)The BMS firmware is not running
176
177 === DS3 – communication indicator ===
178
179 (% style="width:539px" %)
180 |(% style="width:175px" %)**State**|(% style="width:361px" %)**Description**
181 |(% style="width:175px" %)**Blinking yellow (2Hz)**|(% style="width:361px" %)Initializing communication with BMS Logic boards
182 |(% style="width:175px" %)**Blinking yellow (25Hz)**|(% style="width:361px" %)Communication with BMS Logic is established
183
184 === DS4 – error indicator ===
185
186 (% style="width:539px" %)
187 |(% style="width:176px" %)**State**|(% style="width:360px" %)**Description**
188 |(% style="width:176px" %)**Blinking red**|(% style="width:360px" %)Errors in communication with BMS Logic
189
190 === DS7 – relay 1 indicator ===
191
192 (% style="width:541px" %)
193 |(% style="width:179px" %)**State**|(% style="width:359px" %)**Description**
194 |(% style="width:179px" %)**Lights green**|(% style="width:359px" %)Relay #1 is closed
195 |(% style="width:179px" %)**Off**|(% style="width:359px" %)Relay #1 is opened
196
197 === DS8 – relay 2 indicator ===
198
199
200 (% style="width:542px" %)
201 |(% style="width:180px" %)**State**|(% style="width:359px" %)**Description**
202 |(% style="width:180px" %)**Lights green**|(% style="width:359px" %)Relay #2 is closed
203 |(% style="width:180px" %)**Off**|(% style="width:359px" %)Relay #2 is opened
204
205 === DS5 – relay 3 indicator ===
206
207 (% style="width:542px" %)
208 |(% style="width:183px" %)**State**|(% style="width:356px" %)**Description**
209 |(% style="width:183px" %)**Lights green**|(% style="width:356px" %)Relay #3 is closed
210 |(% style="width:183px" %)**Off**|(% style="width:356px" %)Relay #3 is opened
211
212 === DS6 – relay 4 indicator ===
213
214 (% style="width:542px" %)
215 |(% style="width:187px" %)**State**|(% style="width:352px" %)**Description**
216 |(% style="width:187px" %)**Lights green**|(% style="width:352px" %)Relay #4 is closed
217 |(% style="width:187px" %)**Off**|(% style="width:352px" %)Relay #4 is opened
218
219