1. Technical specifications

Last modified by Admin on 2024/12/23 16:52

Technical specifications

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The BMS Main 3X is a device that controls a complex battery system consisting of multiple battery modules. The BMS Main 3X interacts with battery modules based on the BMS Main 3, provides dynamic connection of battery modules for charging and operating on load, calculates and transmits information about the state of the battery system to a top-level system.

Note: BMS Main 3 and BMS Main 3X are different products based on the same PCB while using different firmware. You can easily switch from BMS Main 3X to BMS Main 3 by flashing the corresponding firmware.

Specifications

ParameterValue
Power supply
Supply voltage, V9 to 32
Current consumption at supply voltage 24 V, mA, max150
KEYRUN or CHARGE_ON signal for turning on the device, V, min8.5
Scalability

Number of battery modules connected in parallel, max

32
Controls
Number of programmable switches for controlling contactors (9-32V, 2.5A)6
Number of programmable discrete inputs (dry contact)6
Number of programmable discrete inputs 9-32V2
Number of programmable discrete outputs (open drain, 40V, 1A)4
Sensors
Number of connected current sensors (two signal lines for each sensor)3

Error in measuring signals from current sensors, V, max

At ambient temperature 25 ± 5 ºС

0.001
Current sensor types

Bidirectional with 5V supply voltage

(LEM series HASS, HTFS, DHAB or analogues)

Number of high voltage measurement inputs (two signal lines for each input)2
High voltage measurement range, V10 to 1000
High voltage measurement error, V, max± 2
Number of connected external temperature sensors (100 kOhm NTC-thermistors)2

Temperature measurement error using external temperature sensors, ºС, max

In the measurement range from -20 to +85 ºС

± 2
Temperature measurement error using a built-in temperature sensor, ºС, max± 2
Humidity measurement error using a built-in humidity sensor, %, max± 10
High-voltage interlock loop (HVIL)
Current in the HVIL, mA, typical25
Total resistance in the HVIL, Ohm, max200
Interfaces
Number of USB interfaces1
USB speed, Mbit/s12
Number of CAN interfaces3
CAN speed, kbit/s125, 250 (by default), 500, 1000
Number of RS-485 interfaces2
RS-485 speed, bit/s600, 1200, 2400, 4800, 9600 (by default), 19200, 38400, 57600, 115200
Output voltage of CAN2 power supply, V5.0 ± 0.5
Output current of CAN2 power supply, mA, max400
Connecting an additional expansion interface moduleBMS Wi-Fi, BMS GSM, BMS LANmodule
Galvanic isolation

Rated insulation voltage, VRMS, min

Conditions: duration 1 minute, AC 50 Hz, 1) between connectors of CAN1, RS-485-1, discrete inputs/outputs interfaces and device power circuits, 2) between connectors of CAN1, RS-485-1, discrete inputs/outputs interfaces and high voltage measurement circuits, 3) between the device power supply circuits and the high voltage measurement circuits

3500
Weight and overall dimensions
Overall dimensions (length × weight × height), mm200 × 123 × 12
Weight, g, max160 ± 5
Operating conditions
Operating temperature range, °С-40 to +85

Overall and mounting dimensions

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