4. Operation and programming
4.1. Operation modes
The BatteryProtect has three operating modes, the appropriate mode can be selected via a programming procedure (see chapter
).
• Mode A: Buzzer or LED mode (default).
• Mode B: Relay mode.
• Mode C: Li-ion mode.
Modes A and B affect the behavior of the alarm output.
Mode C, the Li-ion mode, takes into account lithium batteries that have an external BMS or a BMS with load and/or charge
disconnect.
Buzzer or LED mode behaviour
• In case of under voltage, a continuous alarm will start after 12 seconds. The BP will disconnect the load after 90 seconds and
the alarm will stop. Reconnect delay: 30 seconds.
• In case of over voltage, the load will be disconnected immediately and an intermittent alarm will remain on until the overvoltage
problem has been corrected. There is no reconnect delay.
Relay mode behaviour
• In case of under voltage, the relay will engage after 12 seconds. The BP will disconnect the load after 90 seconds and the relay
will disengage.
• In case of over voltage, the load will be disconnected immediately and the alarm output will remain inactive. Overvoltage trip
levels: 16V (for a 12V system) respectively 32V (for a 24V system).
Li-ion mode behaviour
Only select the Li-Ion mode if your BMS has a load disconnect and/or a charge disconnect output. This is usually not the case
for so-called drop-in batteries with internal BMS. For lithium batteries/BMS without load disconnect output, select mode A or B
instead.
Connect the load or charge disconnect (depending on application) output of the BMS to the Remote H terminal of the
BatteryProtect.
• The load or charger is disconnected
immediately
when the load or charge disconnect output of the BMS switches from ‘high’
to ‘free floating’. The under voltage thresholds and alarm output of the BatteryProtect are inactive in this mode.
• It will remain disengaged for 30 seconds, even if it receives a re-engage signal within that time period. After 30 seconds it will
respond immediately to a re-engage signal.
BatteryProtect 12/24V
Page 9
Operation and programming
