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AWZ333
10
3.3 Technical outputs.
The PSU is equipped with two independent indication outputs, OC type (open collector). They enable
transmitting the information about no AC power status and system faults.
Fig. 6. Electrical diagram of OC outputs.
AW – failure output
: an OC type output indicating a PSU failure. In normal state (during correct operation)
the output connected to the ground, in case of the failure – disconnected.
BS - absence of AC supply output
: - OC type output that indicates absence of 230V AC supply. In
normal status, with 230V AC supply, the output is open. In case of power loss, the PSU will switch the
output after a time period set by the Z1, Z2
jumpers (Fig. 7).
Fig. 7. Configuration of the jumpers.
4. Operation and use.
4.1 Launching the PSU from a battery
Battery-assisted operating time depends on: the battery capacity, charging level and load current. For
instance, for a typical, fully-charged 17Ah battery and load current of 3A, the maximum safe working time amounts
to approx. 4h 30 min.
Launching the PSU from a battery
: push the START button on the device’s board and hold for 5 seconds
Finishing the battery-assisted operation
: push the STOP button on the device’s board and hold for
2 seconds. The PSU will disconnect the output after 10 seconds.
4.2 Disconnection of a discharged battery.
The PSU is equipped with the discharged battery disconnection system and discharged battery indication.
During the battery-assisted operation, reducing voltage below ~10V at the battery terminals will trigger a countdown
to the battery disconnection. The disconnection time period is Z3, Z4 jumper selectable. (Fig.8)
Fig. 8. Configuration of the jumpers.
4.3 Dynamic battery test
The PSU runs a battery test every 10 minutes. It is done by a momentary output voltage reduction and
voltage measurement at the battery terminals. A failure is indicated when voltage drops below ~12,2V. The battery
test facility can be switched off if, for instance, the battery is not connected to the PSU.
Deactivating/activating the test:
while mains supply, 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.8.)
testing off – 12 sounds
testing on – 3 sounds
