Installation Instructions
2-4
Sounder (Siren) Connections
1. Make sounder connections to alarm output terminals 3
(+) and 4 (–).
For supervised output, continue with steps 2 and 3.
2. Cut the red Siren Supervision Jumper located above
terminals 2 and 3 on the control board.
3. Connect a 2k ohm resistor across the terminals of the
last sounder.
+
+
_
_
2
EXTERNAL ALARM
SOUNDER
TERMINALS ON
CONTROL BOARD
ALARM
OUTPUT
TERMINALS
V48sounder-001-V0
3
4
CUT RED JUMPER ON CONTROL
BOARD TO ENABLE SIREN
(SOUNDER) SUPERVISION.
2000
OHM
EOL
RESISTOR
IF SIREN SUPERVISION IS ENABLED
(RED JUMPER ON CONTROL BOARD IS CUT)
CONNECT A 2000 OHM RESISTOR ACROSS
THE EXTERNAL SOUNDER AS SHOWN BY
THE DOTTED LINE.
DO NOT CONNECT THE RESISTOR AT THE
ALARM OUTPUT TERMINALS THEMSELVES!
OBSERVE
POLARITY
Figure 5. Sounder Wiring (Supervised)
Notes
•
The 12VDC sounder output activates when an
alarm occurs.
•
Total current drain from this output cannot
exceed 2 amps (going beyond 2 amps will
overload the power supply, or may cause the
electronic circuit protecting the sounder output
to activate).
•
You must install a battery, since the battery
supplies this current.
•
Do NOT perform steps 2 and 3 if using a self-
activated siren.
UL
•
Use only UL Listed sounding devices for UL
installations.
•
Siren supervision is required for fire alarm
installations.
•
The total current drawn from the alarm output and the
auxiliary power output, combined, cannot exceed 600
mA. In addition, the sounding device must be a UL
Listed audible signal appliance rated to operate in a
10.2-13.8 VDC voltage range, and must be mounted
indoors.
Wiring the AC Transformer
Transformer:
Connect the Transformer to terminals 1 and 2 on the
control board. See wiring table at right for wire size to
use.
Use wired-in or plug-in 110 (e.g. 1321)/220VAC
transformer, with 16.5VAC, 25VA output.
UL Installations: Use 110VAC transformer only.
Notes
•
Use caution when wiring the transformer to the
control to guard against blowing the transformer
fuse (the fuse is non-replaceable).
•
Wiring to the AC transformer must not exceed
76m using 1.2mm O.D. wire. The voltage
reading between terminals 1 and 2 of the
control must not fall below 16.5VAC or an “AC
LOSS” message will be displayed.
•
Do not connect to AC mains power while making
any wiring connections to the control. As a safety
precaution, always power down the control when
making such connections.
Wiring Table
Distance from control
Wire Gauge
Up to 15m
0.8mm O.D.
15-30m 1.0mm
O.D.
30-76m 1.2mm
O.D.
Summary of Contents for ADEMCO VISTA-48D
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