BMS Logic 18S
Measuring module
Modular BMS for 24-2000V batteries
BMS Logic 18S represents the third generation of measuring modules that takes the best from BMS Logic 18 and offers advanced balancing algorithms and smaller size.
It determines voltage and temperature of the battery cells and does passive balancing of the cells on a command from the BMS controller.

- 6-18 cells
(accuracy ±3mV) - 18 temperature sensors
- Passive balancing (up to 460 mA @4.2V)
- RS-485 (3500V RMS isolation)
Compatible controllers: BMS Main 2R, BMS Main 3
Compatible auxiliary modules: BMS Repeater
| Parameter | Value |
|---|---|
| Supply voltage, V | 5.0 ± 0.5 |
| Current consumption @5 V, mA (max) | 4 |
| Cells stack voltage, V | 16 to 78 |
| Power consumption @Cells stack, mW (max) | 175 |
| Number of cells | 6 to 18 |
| Balancing current @4.2 volts on a cell, mA (max) | 460 |
| Cell voltage measurement error, V | ± 0.004 |
| Cell temperature measurement error, °С | ± 2 |
| Dimensions (length × width × height), mm | 145 × 62 × 16 |
| Weight, g | 160 ± 20 |
| Operating temperature range, °С | -40 to +85 |
| Rated insulation voltage between communication lines and cell stack lines, AC 50Hz, 1 minute, VRMS (minimum) | 3500 |
| The degree of protection from external influences | IP00 |