Unicont SPb Ltd
Technical Documentation CH-105
Page 12
7.
Connection of external alarm unit
If
ABC
is installed inside the panel or utility room from which the navigator cannot
hear built-in alarm signals of
ABC,
for alert use the external alarm unit AU-106 which will
inform the navigator about loss of
ABC input power supply
or setting of
ABC to emergency
operation mode.
Operation of external signalling of AU-106 is based on the principle of closing/opening
of "dry contacts" of ABC relay. AU-106 receives power supply from
AB being
charged or if
required from other independent power supply sources.
ABC
has special terminals for connection of alarm unit AU-106 with marking "AU-
106" (refer to Figure 4).
8.
ABC AlARMS and signalling
Battery charger has alarm signalling with visual, sound and relay signalling of navigator
about emergency situation in
ABC
operation. Alarm situations in which the signalling operates
are specified in the table (Table 4):
Table 4 Alarm situations causing activation of ABC signalling
Type of emergency situation
Red light-
emitting
diode
Buzzer
Relay contacts
Loss
of
ABC input power supply
+
+
Open
Start of
ABC
with disconnected
AB
(operates only when
ABC is started
)
+
+
Open
Connection of
AB
to
ABC
with reverse polarity
(operates only when
ABC is enabled
)
+
+
Open
Overvoltage in ABC supply circuit
+
+
Open
Current overload or short-circuit in AB circuit
+
+
Open
Charging voltage beyond the preset limits
+
+
Open
Charging current beyond the preset limits
+
+
Open
Connection of power supply with reverse polarity (only
for
ABC
with d.c. power supply)
+
+
Open
If one of the above mentioned situations takes place,
ABC
automatically activates built-
in signalling and external alarm unit AU-106. To disable sound signalling, press the key
"MUTE" (refer to Figure 9); here, visual signalling will remain active until the cause of
signalling is eliminated.
