BMS Main 2.1 firmware upgrade procedure is described here.

v1.67.0

BMS_Main_2.1_v1.67.0.srec 

Features

• new additional heater controller (see the "Protections - Heater (AUX) control" section), which generates the "Heater (AUX)" signal, which can be assigned to a discrete output or relay

Improvements

• new balancing strategy that attempts to keep the temperature of BMS Logic devices below a set value by discharging cells with higher voltages first than others (see the "Cells - Cell balancing" section)

v1.66.1

BMS_Main_2.1_v1.66.1.srec 

Improvements

• closing all TCP connections over Ethernet if the interface link is down

v1.66.0

BMS_Main_2.1_v1.66.0.srec 

Features

• support for the insulation monitoring device BMS IMD (see the section "External equipment - BMS IMD device")

Improvements

• new parameters for switching off the Discharging (AUX) relay when the cell voltage is too low (see the "Cells - Discharging (AUX) control" section)