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11
VAD-2 Plus Installation and Operation Manual
INSTALLATION
Power Failure input:
Connect a user supplied 6 to 12 volts DC only power source to the power failure
input connector labeled PF+ and PF-. An inexpensive 6 to 12 volt DC wall trans-
former of any current of 50ma or more will do.
NOTE:
The primary (120vac) of
the wall transformer should be connected to the utility company side of your serv-
ice. An UPS is suggested to power the VAD-2 Plus during power outages.
Temperature Probe (optional):
Insert the temperature probes (25 foot cable) mini (3.5mm) plug in to the left rear
panel jack labeled “TEMP” (0°F to +190°F (0°C to +85°C). NOTE: Please limit
the total length of cable to 50 feet.
NOTE: The Probe should only be installed
or removed with power disconnected from the VAD-2 Plus.
External five volt supply
Used to supply power to external equipment between this terminal and ground.
Limit load to 100 ma
MAX.
Relays:
Connection for relay one is between the
K1NO, K1NC and K1CM terminals.
Relay two is between terminals
K2NO, K2NC and K2CM.
Limit contact current
to 1 amp at 30 vdc.
! Note: For safety, never connect 120 Vac circuits to these relays!
Telephone “CALLER” line output:
Balanced CALLER telephone line audio output is available between the CLR- and
CLR+ terminals. For unbalanced loads, use the "CLR +" and GND terminals only.
Do not connect the "CLR -"
terminal to ground. Shields should be tied to the
“Chs Gnd” terminal.
PWR (Power):
The 12 VAC wall power supply is connected to the 2.1mm coaxial connector.
Telephone Line RJ-11 Jack:
Connect your central office “Loop Start” ONLY POTS line here.
This line
SHOULD be equipped with CPC (Calling Party Control, WINK or COD) to
function properly.
Guard Time Setting:
This feature allows you to set how fast the DTMF tones are detected. JP3 header
selections:
Fast – 50 ms
Medium – 100 ms(default)
Slow – 150 ms
Note:
JP 3 can be found inside the VAD-2 Plus near the center cover screw hole.
Mounting:
The VAD-2 Plus may be set on a desktop, mounted on a wall or as part of the new
RA-1 mounting shelf. Up to four units may be installed on one RA-1. Filler panels
are provided. RA-1 (filler panel is provided).
