PSBSEP04124
www.pulsar.pl
10
3.2 Technical outputs.
The PSU has the following indication outputs:
•
FAC – • FAC technical output indicating AC power failure
- OC type output indicating AC power failure. During normal operation, (230V AC power on) the output is
shorted to ground (L state – 0V). In case of power loss, the PSU will switch the output into hi-Z state (high
impedance) after a time lag set by the J1 and J2 jumpers: 5s/140s/17m/2h20m.
- R type output – relay type, indicating AC power failure. In case of failure, relay contacts are switched
automatically after a time lag set by the J1 and J2 jumpers: 5s/140s/17m/2h20m.
CAUTION! The arrangement of contacts at the figure 6 shows a potential-free status of the relay,
which is equivalent to AC power failure.
•
FPS – technical output of the PSU operation status: - OC type output indicating failure (short-circuit,
overload). During normal operation, shorted to ground – L state (0V). In case of failure, the output is switched
into hi-Z state (high impedance).
•
FLB – technical output indicating low battery voltage: - OC type output indicating low battery voltage
during battery operation. For the battery voltage V
BAT
>23V, the output is shorted to ground (L state – 0V). If
the battery voltage has dropped below V
BAT
<23V, the PSU will switch the output into high impedance state hi-
Z.
The technical outputs of the PSU are in the open collector (OC) configuration as shown in the Figure
below.
Fig. 5. Electrical diagram of the OC technical outputs.
.
Fig. 6. Electrical diagram of the relay output
•
TAMPER - output indicating enclosure opening: - volt free contact input indicating the status of the
power supply doors, PSU closed: contacts closed (NC), PSU open: contacts open (NO).
4
Service and operation.
4.1 Procedure in case of short-circuit of the power supply output (SCP activation).
The AUX1 ÷ AUX4 outputs are protected against short-circuit by
melting fuses or PTC polymer fuses
(protection type is adjusted with the FS-x jumper). In case of melting fuse activation, it should be replaced with a
fuse of the same type. If the PTC polymer fuses are used, the output voltage is automatically disconnected, which
is indicated by switching off the green LED. Disconnect the load from the power supply output for approximately 1
minute.
4.2 Procedure in case of short-circuit of the BAT output or reverse battery connection.
In case of short-circuit of the BAT output or reverse battery connection, the F
BAT
fuse in the battery circuit
becomes damaged. Restoration of the voltage at the BAT output requires fuse replacement.
4.3 Procedure in case of overvoltage protection OVP activation.
The PSU is protected against overvoltage at the AUX1 ÷ AUX4 outputs. Overvoltage protection thresholds are
selected with the OVP-x jumpers. In case of overvoltage protection activation, the output voltage is automatically
disconnected, which is indicated by switching off the green AUX LED and turning on the corresponding OVPx LED.
To resume operation, lower the output voltage with a potentiometer or shift the overvoltage protection threshold to
higher values.
The protection level should be set min. 1.5 V above the output voltage.
