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GREY POWER plus
9
3.2 Acoustic indication.
Emergency situations are acoustically indicated by a buzzer. The frequency and the number of signals
depend on a fault type (Tab.8). The acoustic indication is off after removing the jumper marked with the
symbol.
Table 8.
Nr
Description
Situation
1
1 signal per 8s
battery-assisted operation, no 230V AC supply
2
2 signal per 16s
undercharged battery, no battery during mains operation,
burnt battery fuse
3
quick signals lasting for 1,5s
PSU restart
4
12 signals
finishing the battery test
5
3 signals
initiating the battery test
6
continuous indication
failure, red LED on
3.3 Technical outputs.
The PSU indication outputs:
EPS FLT - technical output indicating 230V AC power failure
.
The output indicates 230V AC power failure. Under normal status
– with the 230V AC supply on, the output
is shorted to ground GND. In case of power failure, the PSU will switch the output into hi-Z high impedance
state after a time set by the T
AC
jumper (J1, J2).
J1=
, J2=
time lag T= 0s
J1=
, J2=
time lag T= 5min
J1=
, J2=
time lag T= 1h
J1=
, J2=
time lag T= 6h
PSU FLT - output indicating PSU failure
.
The output indicates PSU failure. Under normal status (correct operation) the output is shorted to ground
GND. If there is no DC voltage at the output (e.g. short circuit), the output is switched into hi-Z high
impedance state.
PSU failure can be caused by the following events:
- Short circuit at the output
- low Uaux output voltage, less than 10V
- high Uaux output voltage, higher than 14,5V
- the PTC output fuse activation
- exceeding the rated current of the PSU
- activation of overvoltage protection OVP
- internal damage of the PSU
APS FLT - output indicating battery failure.
Output indicating failure in the battery circuit. Under normal status (correct operation), the output is shorted
to ground GND. In case of power failure, the output is switched into hi-Z high impedance state. Any failures
can be triggered by the following events:
- defective or low battery
- battery fuse failure
- no continuity in the battery circuit
- battery voltage below 11,5V during battery-assisted operation
The power supply technical outputs are open collector (OC) type, as shown schematically below.
Fig. 4. Electrical diagram of OC outputs.
