2. Connection - Movicom Electric Docs

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= Headers =

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The BMS Main 2.1 headers are shown in figure below.

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[[The BMS Main 2.1 headers>>image:1731517946345-632.png||height="417" width="451"]]

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=== P1 – header for power supply ===

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[[image:1731516593096-166.png||data-xwiki-image-style-alignment="center"]]

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|(% style="width:100px" %)**Pin**|(% style="width:502px" %)**Name**|**Description**

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|(% style="width:100px" %)**1**|(% style="width:502px" %)**GND**|Ground

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|(% style="width:100px" %)**2**|(% style="width:502px" %)**V+**|Supply voltage 9-30V

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=== P15 – header for BMS Logic ===

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[[image:1731516577472-301.png||data-xwiki-image-style-alignment="center"]]

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|(% style="width:100px" %)**Pin**|(% style="width:290px" %)**Name**|**Description**

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|(% style="width:100px" %)**1**|(% style="width:290px" %)**RS485_A**|RS-485 line A for communication with BMS Logic

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|(% style="width:100px" %)**2**|(% style="width:290px" %)**RS485_B**|RS-485 line B for communication with BMS Logic

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|(% style="width:100px" %)**3**|(% style="width:290px" %)**+5V**|Supply voltage for BMS Logic

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|(% style="width:100px" %)**4**|(% style="width:290px" %)**GND**|Ground

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=== P12 – header for current sensor ===

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[[image:1731516685999-633.png||data-xwiki-image-style-alignment="center"]]

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|(% style="width:100px" %)**Pin**|(% style="width:293px" %)**Name**|(% style="width:1129px" %)**Description**

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|(% style="width:100px" %)**1**|(% style="width:293px" %)**+5V**|(% style="width:1129px" %)Supply voltage for the current sensor 5V, max 50 mA

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|(% style="width:100px" %)**2**|(% style="width:293px" %)**GND**|(% style="width:1129px" %)Ground

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|(% style="width:100px" %)**3**|(% style="width:293px" %)**Vcs**|(% style="width:1129px" %)ADC input (current sensor output)

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|(% style="width:100px" %)**4**|(% style="width:293px" %)**Vref**|(% style="width:1129px" %)ADC input (current sensor reference signal)

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=== P13 – header for humidity sensor ===

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[[image:1731516942455-641.png||data-xwiki-image-style-alignment="center"]]

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|(% style="width:100px" %)**Pin**|(% style="width:292px" %)**Name**|(% style="width:1130px" %)**Description**

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|(% style="width:100px" %)**1**|(% style="width:292px" %)**+5V**|(% style="width:1130px" %)Supply voltage 5 V, max 50 mA

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|(% style="width:100px" %)**2**|(% style="width:292px" %)**GND**|(% style="width:1130px" %)Ground

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|(% style="width:100px" %)**3**|(% style="width:292px" %)**Vhs**|(% style="width:1130px" %)ADC input (humidity sensor output)

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|(% style="width:100px" %)**4**|(% style="width:292px" %)**Vts**|(% style="width:1130px" %)ADC input (temperature sensor output)

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=== P8 – header of relay 1 ===

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[[image:1731517023208-641.png||data-xwiki-image-style-alignment="center"]]

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By default, relay 1 is used to control the discharging contactor.

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|(% style="width:100px" %)**Pin**|(% style="width:291px" %)**Name**|(% style="width:1131px" %)**Description**

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|(% style="width:100px" %)**1**|(% style="width:291px" %)**V+**|(% style="width:1131px" %)Switching voltage (up to 55V, max 2A)

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|(% style="width:100px" %)**2**|(% style="width:291px" %)**NO**|(% style="width:1131px" %)Normally open contact

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=== P9 – header of relay 2 ===

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[[image:1731517025702-799.png||data-xwiki-image-style-alignment="center"]]

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By default, relay 2 is used to output the “Allow charging” signal.

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|(% style="width:100px" %)**Pin**|(% style="width:297px" %)**Name**|(% style="width:1125px" %)**Description**

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|(% style="width:100px" %)**1**|(% style="width:297px" %)**V+**|(% style="width:1125px" %)Switching voltage (up to 55V, max 2A)

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|(% style="width:100px" %)**2**|(% style="width:297px" %)**NO**|(% style="width:1125px" %)Normally open contact

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=== P6 – header of relay 3 ===

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[[image:1731517025702-799.png||data-xwiki-image-style-alignment="center"]]

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By default, relay 3 is used to control the charging contactor.

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|(% style="width:100px" %)**Pin**|(% style="width:297px" %)**Name**|(% style="width:1125px" %)**Description**

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|(% style="width:100px" %)**1**|(% style="width:297px" %)**V+**|(% style="width:1125px" %)Switching voltage (up to 55V, max 8A)

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|(% style="width:100px" %)**2**|(% style="width:297px" %)**NO**|(% style="width:1125px" %)Normally open contact

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=== P7 – header of relay 4 ===

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[[image:1731517025702-799.png||data-xwiki-image-style-alignment="center"]]

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By default, relay 4 is used to control the heater.

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|(% style="width:100px" %)**Pin**|(% style="width:298px" %)**Name**|(% style="width:1124px" %)**Description**

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|(% style="width:100px" %)**1**|(% style="width:298px" %)**V+**|(% style="width:1124px" %)Switching voltage (up to 55V, max 8A)

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|(% style="width:100px" %)**2**|(% style="width:298px" %)**NO**|(% style="width:1124px" %)Normally open contact

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=== P14 – header for CAN and RS-485 interfaces ===

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[[image:1731517180930-597.png||data-xwiki-image-style-alignment="center"]]

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|(% style="width:100px" %)**Pin**|**Name**|**Description**

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|(% style="width:100px" %)**1**|**EXT_RS485_A**|RS-485 line A for communication with external equipment

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|(% style="width:100px" %)**2**|**CAN_H**|CAN H line for communication with external equipment

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|(% style="width:100px" %)**3**|**+5V_CAN**|Supply voltage 5V for external devices, max 200 mA

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|(% style="width:100px" %)**4**|**EXT_RS485_B**|RS-485 line B for communication with external equipment

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|(% style="width:100px" %)**5**|**CAN_L**|CAN L line for communication with external equipment

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|(% style="width:100px" %)**6**|**GND_CAN**|Ground

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=== P21 – CAN termination resistor jumper ===

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[[image:1731517188900-976.png||data-xwiki-image-style-alignment="center"]]

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To connect the termination resistor between the lines **CAN_H** and **CAN_L**, install a jumper, according to the P21 pinout:

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|(% style="width:100px" %)**Pin**|(% style="width:299px" %)**Name**|(% style="width:1123px" %)**Description**

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|(% style="width:100px" %)**1-2**|(% style="width:299px" %)**120 Ohm**|(% style="width:1123px" %)Termination resistor 120 Ohm is connected

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|(% style="width:100px" %)**2-3**|(% style="width:299px" %)**-**|(% style="width:1123px" %)Termination resistor 120 Ohm is not connected

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=== P22 - RS-485 termination resistor jumper ===

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[[image:1731517195672-298.png||data-xwiki-image-style-alignment="center"]]

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To connect the termination resistor between the **EXT_RS485_A** and **EXT_RS485_B** lines, install a jumper according to the P22 pinout:

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|(% style="width:100px" %)**Pin**|(% style="width:301px" %)**Name**|(% style="width:1121px" %)**Description**

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|(% style="width:100px" %)**1-2**|(% style="width:301px" %)**120 Ohm**|(% style="width:1121px" %)Terminating resistor 120 Ohm is connected

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|(% style="width:100px" %)**2-3**|(% style="width:301px" %)**-**|(% style="width:1121px" %)Terminating resistor 120 Ohm is not connected

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=== P11 – header for discrete inputs/outputs ===

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[[image:1731517206246-979.png||data-xwiki-image-style-alignment="center"]]

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|(% style="width:100px" %)**Pin**|(% style="width:310px" %)**Name**|(% style="width:1112px" %)**Description**

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|(% style="width:100px" %)**16**|(% style="width:310px" %)**IN_1**|(% style="width:1112px" %)Discrete input #1 “dry contact” (+5V)

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|(% style="width:100px" %)**8**|(% style="width:310px" %)**GND_1**|(% style="width:1112px" %)Discrete input #1 “dry contact” (ground)

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|(% style="width:100px" %)**15**|(% style="width:310px" %)**IN_2**|(% style="width:1112px" %)Discrete input #2 “dry contact” (+5V)

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|(% style="width:100px" %)**7**|(% style="width:310px" %)**GND_2**|(% style="width:1112px" %)Discrete input #2 “dry contact” (ground)

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|(% style="width:100px" %)**14**|(% style="width:310px" %)**IN_3**|(% style="width:1112px" %)Discrete input #3 “dry contact” (+5V)

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|(% style="width:100px" %)**6**|(% style="width:310px" %)**GND_3**|(% style="width:1112px" %)Discrete input #3 “dry contact” (ground)

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|(% style="width:100px" %)**13**|(% style="width:310px" %)**IN_4**|(% style="width:1112px" %)Discrete input #4 “dry contact” (+5V)

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|(% style="width:100px" %)**5**|(% style="width:310px" %)**GND_4**|(% style="width:1112px" %)Discrete input #4 “dry contact” (ground)

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|(% style="width:100px" %)**12**|(% style="width:310px" %)**OUT_4**|(% style="width:1112px" %)Discrete output #4 (+5V, 20mA)

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|(% style="width:100px" %)**4**|(% style="width:310px" %)**GND_OUT_4**|(% style="width:1112px" %)Discrete output #4 (ground)

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|(% style="width:100px" %)**11**|(% style="width:310px" %)**OUT_3**|(% style="width:1112px" %)Discrete output #3 (+5V, 20mA)

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|(% style="width:100px" %)**3**|(% style="width:310px" %)**GND_OUT_3**|(% style="width:1112px" %)Discrete output #3 (ground)

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|(% style="width:100px" %)**10**|(% style="width:310px" %)**OUT_2**|(% style="width:1112px" %)Discrete output #2 (+5V, 20mA)

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|(% style="width:100px" %)**2**|(% style="width:310px" %)**GND_OUT_2**|(% style="width:1112px" %)Discrete output #2 (ground)

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|(% style="width:100px" %)**9**|(% style="width:310px" %)**OUT_1**|(% style="width:1112px" %)Discrete output #1 (+5V, 20mA)

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|(% style="width:100px" %)**1**|(% style="width:310px" %)**GND_OUT_1**|(% style="width:1112px" %)Discrete output #1 (ground)

= Indicators =

=== DS1 – power indicator ===

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|(% style="width:100px" %)**State**|**Description**

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|(% style="width:100px" %)**Lights red**|The device is powered

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|(% style="width:100px" %)**Off**|The device is not powered

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=== DS2 – operation indicator ===

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|(% style="width:100px" %)**State**|**Description**

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|(% style="width:100px" %)**Blinking green**|The BMS firmware is running

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|(% style="width:100px" %)**Off**|The BMS firmware is not running

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=== DS3 – communication indicator ===

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|(% style="width:100px" %)**State**|**Description**

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|(% style="width:100px" %)**Blinking yellow (2Hz)**|Initializing communication with BMS Logic boards

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|(% style="width:100px" %)**Blinking yellow (25Hz)**|Communication with BMS Logic is established

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=== DS4 – error indicator ===

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|(% style="width:100px" %)**State**|**Description**

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|(% style="width:100px" %)**Blinking red**|Errors in communication with BMS Logic

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=== DS7 – relay 1 indicator ===

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|(% style="width:100px" %)**State**|**Description**

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|(% style="width:100px" %)**Lights green**|Relay #1 is closed

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|(% style="width:100px" %)**Off**|Relay #1 is opened

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=== DS8 – relay 2 indicator ===

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(% style="width:287px" %)

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|(% style="width:100px" %)**State**|(% style="width:183px" %)**Description**

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|(% style="width:100px" %)**Lights green**|(% style="width:183px" %)Relay #2 is closed

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|(% style="width:100px" %)**Off**|(% style="width:183px" %)Relay #2 is opened

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=== DS5 – relay 3 indicator ===

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|(% style="width:100px" %)**State**|**Description**

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|(% style="width:100px" %)**Lights green**|Relay #3 is closed

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|(% style="width:100px" %)**Off**|Relay #3 is opened

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=== DS6 – relay 4 indicator ===

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|(% style="width:100px" %)**State**|**Description**

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|(% style="width:100px" %)**Lights green**|Relay #4 is closed

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|(% style="width:100px" %)**Off**|Relay #4 is opened

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