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MSRK series
8
3.3. Technical outputs
– relay.
If the OC type outputs are not sufficient to control the unit, it is possible to use the AWZ639relay module
changing technical outputs of the OC type to relay type.
Fig. 5. The diagram of connecting the AWZ639 module.
3.4. Standby time.
Battery-assisted operating depends on battery capacity, charging level and load current. To maintain an
appropriate standby time, current drawn from the PSU in battery mode should be limited:
Total current of the rec battery charging current must
n’t cross maximum current of power supply
3.5. Battery charging time.
The PSU has a battery circuit charged with direct current. The current selection is done with use of the I
BAT
jumpers. The table below shows how long does it take to charge a (fully discharged) battery up to min. 80% of its nominal
capacity.
Table 9. Battery charging time up to the capacity of 0,8.
Battery
Charging current
0,2A
0,5A
1A
7Ah - 9Ah
32h
– 36h
13h - 15h
-
17Ah - 20Ah
-
28h - 32h
14h - 16h
28Ah
-
-
23h
40Ah
-
-
36h
3.6. Running PSU on battery backup.
Power supply allows you to run on battery backup when necessary. To do this, press the START button on PCB.
4. Operation and use.
4.1. Overload or short circuit of the PSU output (SCP on).
The AUX output is equipped with an electronic protection. If power supply is loaded with current exceeding
IMAX. (load 110% ÷ 150% of PSU power), current and voltage are automatically limited. Voltage at output is restored
automatically after overload is removed.
In case of of the short-circuit to the AUX, BAT output, or incorrect connection of the battery, the fuse F
BAT
in the
battery circuit becomes permanently damaged and the restoration of the voltage at the BAT output requires the
replacement of the fuse.
4.2. Dynamic battery test.
The PSU runs a battery test every 5 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 approx.12,2 V
4.3 Maintenance.
Any and all maintenance operations may be performed following the disconnection of the PSU from the power
supply network. The PSU does not require performing any specific maintenance measures, however, in the case of
significant dust rate, its interior is recommended to be cleaned with compressed air. In the case of a fuse replacement,
use a replacement of the same parameters.
