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PSACH01244
3
1. Technical description.
1.1. General description.
The AC/AC PSU intended for
supplying
devices requiring voltage AC of
24V AC
(U1= 24V AC/ U2= 27V AC)
and total capacity of
4A@24V AC.
It features protections: short-circuit (SCP), overload (OLP), transformer overheat
(OHP). The PSU is housed in a ABS enclosure that features a microswitch indicating unwanted opening of the front
door (faceplate).
1.2. Block diagram.
Fig.1. Block diagram of the PSU.
1.3. Description of PSU components.
Tab.1. Elements of the power supply unit.
Element no.
[Fig. 2]
Description
[1]
Isolation transformer
[2]
TAMPER,
tampering connector
(NC)
[3]
AUX: U2-U1-0V
secondary voltage connector, devices power supply (SEC)
[4]
F2
fuse in the secondary voltage circuit
[5]
F1
fuse in the power supply circuit (230V AC, PRI)
[6]
L-N
connector 230V/AC,
PE protection connector
Fig.2. The view of the PSU.
