1. Technical specifications
Technical specifications
BMS Main 2RX inherits the BMS Main X features and implements them in BMS Main 2.1 form factor.
BMS Main 2RX is a device that controls a complex battery system consisting of multiple battery modules. The BMS Main 2RX interacts with battery modules based on the BMS Main or BMS Mini controllers, 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.
Specifications
| Parameter | Value |
| Power supply | |
| Supply voltage, V | 9 to 32 |
| Current consumption at supply voltage 24 V, mA, max | 100 |
| Scalability | |
Number of battery modules connected in parallel, max | 32 |
| Controls | |
| Number of programmable solid-state relays for contactors (55V, 3A) | 4 |
| Number of programmable discrete inputs (dry contact) | 4 |
| Number of programmable discrete outputs (+5V, total 200mA) | 4 |
| Sensors | |
| Number of connected current sensors (two signal lines for each sensor) | 2 |
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 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 |
| Interfaces | |
| Number of USB interfaces | 1 |
| USB speed, Mbit/s | 12 |
| Number of CAN interfaces | 2 |
| CAN speed, kbit/s | 125, 250 (by default), 500, 1000 |
| Number of RS-485 interfaces | 2 |
| RS-485 speed, bit/s | 600, 1200, 2400, 4800, 9600 (by default), 19200, 38400, 57600, 115200 |
| Output voltage of CAN power supply, V | 5.0 ± 0.5 |
| Output current of CAN power supply, mA, max | 400 |
| Number of Ethernet interfaces | 1 |
| Ethernet speed, Mbps | 10/100 |
| Connecting an additional expansion interface module | BMS Wi-Fi, BMS GSM, BMS LANmodule |
| Headers X1, X8-X13 type | Molex series Micro-Fit |
| Headers X2-X5 type | Molex series Mini-Fit |
| 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), mm | 120 × 120 × 16 |
| Weight, g, max | 100 ± 10 |
| Operating conditions | |
| Operating temperature range, °С | -40 to +85 |
Overall and mounting dimensions 