«NPK Morsvyazavtomatica» LLC
Operating manual
Page 6
Description of the functional elements, controls and indication is represented in
table 2.
Table 2 – Description of the functional elements, controls and indication of the PSU
Tag
№
Element
Type, standard size, identifier
Description
1
Piano type switch
–
Piano type switch to turn power on
(off), with backlight
2
Ground stud
М5х20
Key element of the unit grounding
point
3
Air grille
–
Cooling of the unit
4
Cable gland
MG-16
Cable gland / input
5
MG-20
6
Fuse holder
FH-02
Protection of input mains from
overload and SC of the unit
Note – Tag № are shown in Figures 1, 2.
1.3.3
Connection of the Product
The main and standby power is supplied to PS-103 and PS-103-20 terminals;
standby power is supplied from backup power sources to provide uninterruptible opera-
tion of the equipment connected to the PSU (see figures 3, 4).
Caution!
The PSU shall not be used to charge SB!
The closing or opening of dry contacts (depending on the connection type) occurs
in case of main power failure, that allows for using the PSU together with connected
alarm unit, AU-106 (AU-206) type, as a signaling unit of voltage loss in power mains or
PSU malfunction.
1.3.3.1
Connection of PSU PS-103
The connection diagram and description of connector terminals of PS-103 are rep-
resented in Figure 3 and in table 3. Pins 2 and 3 of connector ХS1 are closed if the main
power is available; if the main power fails, the pins are opened.
Pins 1 and 2 of connector ХS1 are opened if the main power is available; if the
main power fails, the pins are closed.