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PSBEN1012B
12
4.2. Deep discharge battery protection UVP.
The PSU is equipped with the disconnection system and the discharged battery indication. If the voltage at
the battery terminals drops below10V±0.2V during battery-assisted operation, the PSU will be disconnected within
approx. 15s. The protection mode is off when the P
BAT
jumper is removed.
Caution.
Deactivating of the UVP function is not recommended since a deep discharge of the battery limits its
capability of storing energy, lowers its capacity and shortens its durability.
4.3 Dynamic battery test.
The PSU runs a battery test every 10 minutes. It is done by a momentary switching into a battery-assisted
operation. A failure is indicated when voltage drops below 12V. The battery test facility can be switched off.
Deactivating/activating the test: during mains-powered PSU operation press the STOP button on the
main board and hold it for 3 seconds. The device will confirm the activation/deactivation in the following ways:
(Tab.4, [6], [7]).
•
testing off – the tOF sign appears on the display
•
testing on – the tON sign appears on the display
Deactivating/activating the test is stored in the memory even after unplugging the device from
mains. The battery failure indication at the APS FLT output is automatically switched off. The
battery protection system against deep discharged remains on, though.
4.4. Standby time.
The standby time during batter-assisted operation depends on: battery capacity, battery charge level and
load current. In order to keep the standby time, the current drawn from the PSU during battery-assisted operation
should be limited. Characteristics for a 7Ah/12V SLA:
Grade 1, 2 - standby time 12h
Output current 0,58A + 0,6A battery charge
Grade 3 - standby time 30h if the faults of the main power source are reported to the Alarm Receiving
Centre - ARC (in accordance with 9.2 – PN-EN 50131-1).
Output current 0,23A + 0,6A battery charge
- standby time 60h if the faults of the main power source are reported to the Alarm Receiving
Centre - ARC (in accordance with 9.2 – PN-EN 50131-1).
Output current 0,116A + 0,6A battery charge
4.5. Battery charging time.
The PSU has a battery circuit charged with direct current. The current selection is done via
I
BAT
jumpers.
The table below shows how long it takes to charge a (fully discharged) battery up to min. 80% of its nominal
capacity.
Table 9. Battery charging time.
7Ah
battery charging time
up to capacity of 0,8*C
Charging
current [A]
Configuration of
I
BAT
jumper
10h30m
0,6
31h30m
0,2
4.6 Operation without a battery.
