Parts Identifications
PAGE 3
LS4600 | 6 CHANNEL SPEAKER LINE SURVEILLANCE
The unit requires 24V DC power supply and recommended PSU shall be Amperes PS9400. Only use regulated power
supply if other than PS9400 is installed.
9. 24V DC POWER SUPPLY PORT
If fault is detected, a buzzing sound shall be emitted with the LED lit. Buzzer alert can be turned off via programming
and this is indicated by this LED.
8. BUZZER LED
When line monitoring is initiated either manually or auto, it shall start in sequence from ch.1 to 6. With each channel
under monitoring, a dry contact shall be available at its correspondence zone. This shall provide 24V overriding
voltage to volume controllers or local patch panel with overriding relay, thus allowing direct measurement to the
speakers. (Refer to Connecting the unit section of the manual). Overriding is required for accurate sensing in which
volume controllers set in various position shall have different impedances and such circumstances shall provide false
alarm or alert.
Recommended practice is that every zone shall have its own 24V overriding circuit back to the rack. If all the
overriding circuits are looped, and if the particular zone with volume controller is set to off, the monitoring activity shall
cause a burst of audio signal (such as BGM), which lasted for approximately 18 seconds. This shall happen only
when a BGM source is presence. If the particular zone is set to OFF (without BGM), the monitoring activity shall not
emit audible sound.
10. ZONE TRIGGER OUTPUT PORT
It is for connections of incoming 100V line signal and output to speakers. Refer to Connecting the Unit in following
section.
11. AMP / ZONE IN - OUT PORTS
Whenever a fault condition is detected, this port shall provide a dry contact to link to external alerting devices, such as
mimic panel, etc.
12. OUTPUT FAULT CONTACT
Event triggered data shall be transmitted with RS485 protocol. This feature is optional and shall be available in future.
13. RS485 OUTPUT (OPTIONAL)
