Valcom Pagepac Plus V-5335621 Manual page 7

DO NOT DEFEAT THE SAFETY
GROUNDING PIN ON THE POWER PLUG.
USE ONLY THE POWER SUPPLY PROVIDED.
Clock Control or Remote Control of Levels [Manual Override] (see Figure 6)
In the case where a user wishes to control the system level by the time of day, it is a simple matter with
the ALC. Use a clock with four separate dry contact closures assigning each to a different time of day.
So long as the contacts are closed the level selected will override the front panel controls. Should two
contacts be closed at the same time the lower level selected will have priority. Also a manual normally
open switch may be used to achieve this result.
Control of External Devices [Relay Outputs] (see Figure 6)
The ALC provides for control of external devices that need activation at maximum noise levels. This is
provided by four sets of dry contact closures on the back panel. These activate at -6 and 0 dB levels.
This can be used for priority override of remote level controls, strobe activation or similar applications.
Set the manual level control to automatic [Blue knob] (see Figure 7). This allows the ALC to calibrate
itself. The automatic position will allow the ALC to constantly change the paging level to compensate for
the changes in noise level in the area being monitored.
Check the SPL meter [Green LED] (see Figure 7) for maximum noise level. This is your high noise level
reading. Then set the maximum noise level control [Red knob] to the average high noise level. If you
feel the room noise may actually be louder at some time, move the control up one click to the right
[clockwise].
Power Input
T elco In
24 V olts AC
Loop Start
POWER SUPPLY
24V AC 1.6A 60 HZ
Figure 5. Power Supply Connection
Line In Output
Level
+ -
C1 G
7
Line Out
+ -
C1 C
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