PSBS1012B
BLUE POWER
9
3.2 Technical outputs.
The PSU has three indication outputs:
EPS -
• 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.
PSU
– 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 (eg 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
- Output overload
- DC/DC voltage converter failure
- Under voltage protection activation
LoB
– output indicating low battery voltage.
The output indicates low battery voltage. Under normal status (U
BAT
> 11,5V) the output is shorted to
ground GND, when the battery voltage drops too low (U
BAT
< 11,5V) the output is switched into hi-Z high
impedance state.
The power supply technical outputs are open collector (OC) type, as shown schematically below.
Fig. 4. Electrical diagram of the OC technical outputs.
3.3 Relay technical outputs.
If the OC type outputs are not sufficient to control the unit, it is possible to use the MPSBS relay module
changing technical outputs of the OC type to relay type.
Fig. 5. The diagram of connecting the MPSBS module.