3
1
.2. Block diagram (fig.1).
Fig.1. Block diagram of the power-supply unit.
1.3
. Description of elements and power supply connectors (tab.1, tab.2, fig.2).
Table 1.
Element no
[Fig. 2]
Description
[1]
A1, A2, A3, B1,B2, B3, C1, C2, C3:
optical signaling of outputs status
AC:
AC supply signaling
A
OVP,
B
OVP,
C
OVP:
optical signaling of (PCB) overvoltage protection (OVP)
[2]
FA1, FA2, FA3, FB1, FB2, FB3, FC1, FC2, FC3:
fuses in the output circuit (DC)
[3]
P: A, B, C voltage adjustments,
output voltage regulation for a particular group
[4]
OUTPUTS of power supply unit
connector (Tab.2)
[5]
F
fuse in the power supply circuit (230V AC)
[6]
L-N
power-supply connector 230V AC,
PE-
shock protection connector
[7]
TAMPER micro-switch (contacts) of the anti-sabotage protection (NC)
[8]
Jumper of the change in PTC/fuse-element safety device type:
Tab.1. Power-supply unit elements.
Table 2.
[4]
Description of power-supply unit outputs
A1, A2, A3,
B1, B2, B3,
C1, C2, C3,
DC supply outputs: +U
GND (x3)
DC supply output: -U (GND, common holder)
Tab.2. Power supply unit output terminals.