Volume Control - E2S GNEXS1DC024 Instruction Manual

GNExS1 DC Sounder
14) Tone Selection & 1st, 2nd, 3rd & 4th Stage
Alarms
The GNExS2 and GNExS1 sounders have 64 different tones
that can be selected independently for the first and second
stage alarms. The sounders can then be switched to sound
the second, third and fourth stage alarm tones. The tones are
selected by operation of two DIP switches on the PCB for
both DC and AC units. The tone table on page four shows
the switch positions for the 64 tones and which tones are
available for the third and fourth stages.
Stage one (S1) operation : Simply connect the supply voltage
to the normal supply terminals (+ve and –ve for DC units, L
and N for AC units). Dip switch 1 alters the stage one tones.
The operation of the second, third and fourth stages is
different for DC and AC units but the stage one supply
terminals must also be connected.
DC Units Second, Third and Fourth Stage Tone Selection
The GNExS2 and GNExS1 DC sounders have the facility to
use either +ve or –ve switching to change the tone to the
second, third and fourth stages. For –ve switching connect
the two headers on the pcb to the left-hand (marked –ve) and
centre pins. For +ve switching connect the headers to the
right hand (marked +ve) and the centre pins.
Stage two (S2) operation : Power +ve and –ve, depending on
which switching mode link either a -ve or +ve supply line to
the S2 terminal. Dip switch 2 alters stage two tone.
Stage three (S3) operation : Power +ve and –ve, depending
on which switching mode link either a -ve or +ve supply line
to the S3 terminal. Dip switch 1 alters stage three tone.
Stage four (S4) operation : Power +ve and –ve, depending on
which switching mode link either a -ve or +ve supply line to
both the S2 & S3 terminals. Dip switch 1 alters stage four
tone.
GNEx S2 AC Second, Third and Fourth Stage Tone Selection
To select the second, third and fourth stage tones on the
GNExS2 AC sounders.
Stage two (S2) operation : Power L and N, link the common
(C) and S2 terminal. Dip switch 2 alters stage two tone.
Stage three (S3) operation : Power L and N, link the common
(C) and S3 terminals. Dip switch 1 alters stage three tone.
Stage four (S4) operation : Power L and N, link the common
(C) both the S2 and S3 terminals. Dip switch 1 alters stage
four tone.
GNExS1 AC Second, Third and Fourth Stage Tone Selection
To select the second, third and fourth stage tones on the
GNExS1 AC sounders.
Stage two (S2) operation : Power L and N, link the L and S2
terminal. Dip switch 2 alters stage two tone.
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DIP Switches

Volume Control

DC Terminals
Stage
Headers
Figure 7
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Stage three (S3) operation : Power L and N, link the L and S3
terminals. Dip switch 1 alters stage three tone.
Stage four (S4) operation : Power L and N, link the L both the
S2 and S3 terminals. Dip switch 1 alters stage four tone.
15) Volume Control
All GNExS2 and GNExS1 sounders have a volume control to
adjust the output level. To set the required output level,
adjust the potentiometer on the PCB. For maximum output
level the potentiometer should be set to the fully clockwise
position.
16) End of Line Monitoring (DC Units)
On GNExS2 and GNExS1 DC units, dc reverse line
monitoring can be used if required. All DC sounders have a
blocking diode fitted in their supply input lines. An end of line
monitoring diode or an end of line monitoring resistor can be
connected across the +ve and –ve terminals. If an end of line
resistor is used it must have a minimum resistance value of
3k3 ohms and a minimum wattage of 0.5 watts or a minimum
resistance value of 500 ohms and a min. wattage of 2 watts.
Wiring Diagram E