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PSDC04124
7
3.1. LED indication (fig. 4.).
•
LED1…LED4
green diodes indicate power at the outputs:
LB4- AUX1…AUX4.
In case of a power loss at the output (fuse activation), an appropriate diode goes out. (L1 for AUX1, L2 for
AUX2 etc.)
•
L
FPS
red
LED [!]
indicates a failure of at least one AUX output (the output’s number is indicated by the
green diode).
Fig. 4. The view of the PSU panel.
3.2 Technical outputs.
The PSU has indication outputs that allow transferring information about a failure or tampering.
•
FPS
- output indicating a fuse failure (outputs of the LB4/AW fuse strip).
The FPS technical output during correct operation of the PSU is connected to ground (GND). Failure of one
of the fuses opens the output – high impedance state. The failure is also indicated by the L
FPS
red diode.
Fig. 5. Electrical diagram of the OC output.
•
TAMPER –
output indicating unwanted opening of the PSU, contains volt-free (potential-free) contacts
indicating the door status - unit closed: NC, unit opened: NO.
4. Operation and use.
4.1. Overload or short circuit at the PSU output.
The AUX1 ÷ AUX4 PSU outputs of the LB4/AW strips are protected against a short circuit by glass fuses or
polymer fuses. If a fuse-assisted protection has been chosen, replace the fuse (of the same parameters) in case of
a failure. If the polymer fuses-assisted protection has been chosen, there will be an automatic disconnection of the
output voltage indicated by the green diode going out. Then, cut off the load from the PSU output for approx. 1
minute.
4.2. 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
case of significant dust level, clean its interior with compressed air. In case of a fuse exchange, use the
replacement of the same parameters.