Alstom SHPM 101 - Power Supply Block Diagram

SERVICE MANUAL R5888C
QUADRAMHO Chapter 2
Appendix A
Page 29 of 71
Figure 28: Power supply block diagram
Plug
A
1
A
2
B
4 C
5
D
6 N
Input from station battery to relay earth stud
Input
filter
Voltage
detector
Pulse width
modulator
Switching
transistor
–DC
Secondary screen
Primary screen
Core
Secondary screen
PCB ZG0911
Filtering
and
regulation
E +24V 1 F0V 3
Filtering
and
regulation
G +12V 2 H0V 4
Filtering
and
regulation
J +5V 5 K0V 8
Filtering
and
regulation
L0V 7
M –12V 9
Transformer with isolation of 2KV for 1 minute
Plug
B
Outputs to relays
+DC
Power supply ZRE01