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Title
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1 -2. Connection
1 +2. Connection procedure
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1 -Additional modules.BMS Main 2\.1.WebHome
1 +Controllers.BMS Main 2\.1.WebHome
Content
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1 -= ​​​​Headers =
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 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 +
3 3  The BMS Main 2.1 headers are shown in figure below.
4 4  
5 -[[The BMS Main 2.1 headers>>image:1731516393377-928.jpeg||height="430" width="428"]]
12 +[[The BMS Main 2.1 headers>>image:1731517946345-632.png||height="417" width="451"]]
6 6  
7 -== P1 – header for power supply ==
14 +(% class="wikigeneratedid" %)
15 +Following chapters describes the BMS Main 2.1 headers pinout.
8 8  
9 -[[image:1731516593096-166.png||data-xwiki-image-style-alignment="center" height="93" width="49"]]
17 +=== P1 – header for power supply ===
10 10  
19 +[[image:1731516593096-166.png||data-xwiki-image-style-alignment="center"]]
20 +
11 11  |**Pin**|**Name**|**Description**
12 12  |**1**|**GND**|Ground
13 13  |**2**|**V+**|Supply voltage 9-30V
14 14  
15 -== P15 – header for BMS Logic ==
25 +=== P15 – header for BMS Logic ===
16 16  
17 -[[image:1731516577472-301.png||data-xwiki-image-style-alignment="center" height="90" width="83"]]
27 +[[image:1731516577472-301.png||data-xwiki-image-style-alignment="center"]]
18 18  
19 19  |**Pin**|**Name**|**Description**
20 20  |**1**|**RS485_A**|RS-485 line A for communication with BMS Logic
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22 22  |**3**|**+5V**|Supply voltage for BMS Logic
23 23  |**4**|**GND**|Ground
24 24  
25 -== P12 – header for current sensor ==
35 +=== P12 – header for current sensor ===
26 26  
27 -[[image:1731516685999-633.png||data-xwiki-image-style-alignment="center" height="98" width="90"]]
37 +[[image:1731516685999-633.png||data-xwiki-image-style-alignment="center"]]
28 28  
29 29  |**Pin**|**Name**|**Description**
30 30  |**1**|**+5V**|Supply voltage for the current sensor 5V, max 50 mA
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32 32  |**3**|**Vcs**|ADC input (current sensor output)
33 33  |**4**|**Vref**|ADC input (current sensor reference signal)
34 34  
35 -P13 – header for humidity sensor
45 +=== P13 – header for humidity sensor ===
36 36  
47 +[[image:1731516942455-641.png||data-xwiki-image-style-alignment="center"]]
48 +
49 +|**Pin**|**Name**|**Description**
50 +|**1**|**+5V**|Supply voltage 5 V, max 50 mA
51 +|**2**|**GND**|Ground
52 +|**3**|**Vhs**|ADC input (humidity sensor output)
53 +|**4**|**Vts**|ADC input (temperature sensor output)
54 +
55 +=== P8 – header of relay 1 ===
56 +
57 +[[image:1731517023208-641.png||data-xwiki-image-style-alignment="center"]]
58 +
59 +By default, relay 1 is used to control the discharging contactor.
60 +
61 +|**Pin**|**Name**|**Description**
62 +|**1**|**V+**|Switching voltage (up to 55V, max 2A)
63 +|**2**|**NO**|Normally open contact
64 +
65 +=== P9 – header of relay 2 ===
66 +
67 +[[image:1731517025702-799.png||data-xwiki-image-style-alignment="center"]]
68 +
69 +By default, relay 2 is used to output the “Allow charging” signal.
70 +
71 +|**Pin**|**Name**|**Description**
72 +|**1**|**V+**|Switching voltage (up to 55V, max 2A)
73 +|**2**|**NO**|Normally open contact
74 +
75 +=== P6 – header of relay 3 ===
76 +
77 +[[image:1731517025702-799.png||data-xwiki-image-style-alignment="center"]]
78 +
79 +By default, relay 3 is used to control the charging contactor.
80 +
81 +|**Pin**|**Name**|**Description**
82 +|**1**|**V+**|Switching voltage (up to 55V, max 8A)
83 +|**2**|**NO**|Normally open contact
84 +
85 +=== P7 – header of relay 4 ===
86 +
87 +[[image:1731517025702-799.png||data-xwiki-image-style-alignment="center"]]
88 +
89 +By default, relay 4 is used to control the heater.
90 +
91 +|**Pin**|**Name**|**Description**
92 +|**1**|**V+**|Switching voltage (up to 55V, max 8A)
93 +|**2**|**NO**|Normally open contact
94 +
95 +=== P14 – header for CAN and RS-485 interfaces ===
96 +
97 +[[image:1731517180930-597.png||data-xwiki-image-style-alignment="center"]]
98 +
99 +|**Pin**|**Name**|**Description**
100 +|**1**|**EXT_RS485_A**|RS-485 line A for communication with external equipment
101 +|**2**|**CAN_H**|CAN H line for communication with external equipment
102 +|**3**|**+5V_CAN**|Supply voltage 5V for external devices, max 200 mA
103 +|**4**|**EXT_RS485_B**|RS-485 line B for communication with external equipment
104 +|**5**|**CAN_L**|CAN L line for communication with external equipment
105 +|**6**|**GND_CAN**|Ground
106 +
107 +=== P21 – CAN termination resistor jumper ===
108 +
109 +[[image:1731517188900-976.png||data-xwiki-image-style-alignment="center"]]
110 +
111 +To connect the termination resistor between the lines **CAN_H** and **CAN_L**, install a jumper, according to the P21 pinout:
112 +
113 +|**Pin**|**Name**|**Description**
114 +|**1-2**|**120 Ohm**|Termination resistor 120 Ohm is connected
115 +|**2-3**|**-**|Termination resistor 120 Ohm is not connected
116 +
117 +=== P22 - RS-485 termination resistor jumper ===
118 +
119 +[[image:1731517195672-298.png||data-xwiki-image-style-alignment="center"]]
120 +
121 +To connect the termination resistor between the **EXT_RS485_A** and **EXT_RS485_B** lines, install a jumper according to the P22 pinout:
122 +
123 +|**Pin**|**Name**|**Description**
124 +|**1-2**|**120 Ohm**|Terminating resistor 120 Ohm is connected
125 +|**2-3**|**-**|Terminating resistor 120 Ohm is not connected
126 +
127 +=== P11 – header for discrete inputs/outputs ===
128 +
129 +[[image:1731517206246-979.png||data-xwiki-image-style-alignment="center"]]
130 +
131 +|**Pin**|**Name**|**Description**
132 +|**16**|**IN_1**|Discrete input #1 “dry contact” (+5V)
133 +|**8**|**GND_1**|Discrete input #1 “dry contact” (ground)
134 +|**15**|**IN_2**|Discrete input #2 “dry contact” (+5V)
135 +|**7**|**GND_2**|Discrete input #2 “dry contact” (ground)
136 +|**14**|**IN_3**|Discrete input #3 “dry contact” (+5V)
137 +|**6**|**GND_3**|Discrete input #3 “dry contact” (ground)
138 +|**13**|**IN_4**|Discrete input #4 “dry contact” (+5V)
139 +|**5**|**GND_4**|Discrete input #4 “dry contact” (ground)
140 +|**12**|**OUT_4**|Discrete output #4 (+5V, 20mA)
141 +|**4**|**GND_OUT_4**|Discrete output #4 (ground)
142 +|**11**|**OUT_3**|Discrete output #3 (+5V, 20mA)
143 +|**3**|**GND_OUT_3**|Discrete output #3 (ground)
144 +|**10**|**OUT_2**|Discrete output #2 (+5V, 20mA)
145 +|**2**|**GND_OUT_2**|Discrete output #2 (ground)
146 +|**9**|**OUT_1**|Discrete output #1 (+5V, 20mA)
147 +|**1**|**GND_OUT_1**|Discrete output #1 (ground)
148 +
149 += Indicators =
150 +
151 +=== DS1 – power indicator ===
152 +
153 +|**State**|**Description**
154 +|**Lights red**|The device is powered
155 +|**Off**|The device is not powered
156 +
157 +=== DS2 – operation indicator ===
158 +
159 +|**State**|**Description**
160 +|**Blinking green**|The BMS firmware is running
161 +|**Off**|The BMS firmware is not running
162 +
163 +=== DS3 – communication indicator ===
164 +
165 +|**State**|**Description**
166 +|**Blinking yellow (2Hz)**|Initializing communication with BMS Logic boards
167 +|**Blinking yellow (25Hz)**|Communication with BMS Logic is established
168 +
169 +=== DS4 – error indicator ===
170 +
171 +|**State**|**Description**
172 +|**Blinking red**|Errors in communication with BMS Logic
173 +
174 +=== DS7 – relay 1 indicator ===
175 +
176 +|**State**|**Description**
177 +|**Lights green**|Relay #1 is closed
178 +|**Off**|Relay #1 is opened
179 +
180 +=== DS8 – relay 2 indicator ===
181 +
182 +
183 +|**State**|**Description**
184 +|**Lights green**|Relay #2 is closed
185 +|**Off**|Relay #2 is opened
186 +
187 +=== DS5 – relay 3 indicator ===
188 +
189 +|**State**|**Description**
190 +|**Lights green**|Relay #3 is closed
191 +|**Off**|Relay #3 is opened
192 +
193 +=== DS6 – relay 4 indicator ===
194 +
195 +|**State**|**Description**
196 +|**Lights green**|Relay #4 is closed
197 +|**Off**|Relay #4 is opened
198 +
37 37  
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