CHAPTER 4: ELECTRICS 4-17
ALPHA ST320 S2
3.2.5. 24V DC power supply
The power supply converts AC 220 V to 24V DC for the low voltage circuit.
3.2.6. PCB (Printed Circuit Board)
P
CB is a board with circuit printed and electrical components welded on the surface. It offers sockets and
terminals for electrical components like relays, cables and fuses. Refer to the table below for functions of
each terminal.
Designation Description
A 220V AC input terminals
B 24V DC output terminals
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