Baldwin Boxall Mitre Amplifiers - Volume Restoration Relay Function

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Issue 2
Volume Restoration Relay.
This relay will energise whenever an input is accessed if the “Vol. Rest / Busy” switch (2) has been
selected.
The relay contacts can switch either an AC or DC signal providing it does not exceed 100V @ 5A.
Here are 3 examples :
Example 1: 3 Wire System to Override a Remote Auto Transformer Volume Control.
Example 2: Aux. Busy Indicator.
Example 3: Paging Only Output.
VOLUME
CONTROL
100V
50V
0V
AMPLIFIER
OUTPUT
+24V
SYSTEM BUSY
INDICATOR
0V
PAGING ONLY
100V
50V
0V
(OFFICES)
MUSIC & PAGING
(WORKSHOP)