User Instructions

www.pulsar.pl PSBOC351225
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3. Operating status indication.
3.1. LED indication
The PSU is equipped with 3 LEDs on the PCB board:
- red LED (Fig.2, element 1) normal status (AC power): permanently illuminated. AC power absence is
indicated by the AC diode going out.
- green LED (Fig.2, element 2) indicates DC power at the PSU output. Under normal status the diode is
permanently illuminated. In case of a short circuit or an overload, the diode is off.
- green LED (Fig.2, element 3) indicates battery voltage level. Under normal status (U
BAT
> 11,5V) the diode is
permanently illuminated. In case of decrease of battery voltage (U
BAT
< 11,5V) the diode is off.
3.2. Technical outputs
The PSU has indication outputs:
 EPS - absence of AC supply output:
- OC type output that indicates AC power loss. Under normal status, with 230V AC supply, the output is
connected to ground (L level – 0V). In case of power loss, the PSU will switch the output into high
impedance state hi-Z.
- relay output indicating the absence of AC supply. In case of power loss, the PSU module will switch the
relay contacts.
CAUTION! In Fig.2. the contact set in the potential-free status corresponds to a state with no AC
power (AC power failure).
 PSU – technical output indicating absence of DC voltage at the PSU:
- OC type output indicating the PSU failure. In normal state (during correct operation) the output is
connected to ground (L level – 0V). In case of absence of DC voltage at the output (e.g. short circuit), the
output is switched into high impedance state – hi-Z.
- relay output. In case of a failure, the contacts of the relay change over.
CAUTION! In the Fig.2. the set of contacts shows a potential-free status of the relay which
corresponds to a state with no DC power (PSU failure).
 LoB – technical output indicating battery voltage:
- OC type output. Under normal status (U
BAT
> 11,5V) the output is connected to ground (L level – 0V). In
case of decrease of battery voltage (U
BAT
< 11,5V) the output is switched into high impedance state – hi-Z.
- relay output. In case of a battery voltage drop U
BAT
< 11,5V, the contacts of the relay change over.
The power supply unit does not feature a battery detection function. In the case of no battery or non battery
connected, the output is in the normal mode.
CAUTION! In the Fig.2. the set of contacts shows a potential-free status of the relay which
corresponds to a state with low battery level (U
BAT
<11,5V).
Fig. 4. Electrical diagram of OC outputs.