Copyright© 1995-2005, Alpha Communications®, All Rights Reserved.
AWD011
Rev. 4 (12/2005)
APPLICATION
The NH201TVA (and NH201TT) series intercom system
allows one or more HT3001 and/or HT2001 series inside
handset stations to communicate with one or more door
entry stations, and to release the door opener at each door
entry station. A number of optional accessories are available
to provide a complete entry intercom signaling and commu-
nications system.
PROCEDURE
1. Read installation instructions for each unit to determine
equipment location and installation method.
2. Install housings and wiring.
3. Install equipment.
4. Check wiring and connect. Observe all local
electrical codes.
5. Apply power and check operation.
HOUSING INSTALLATION AND
EQUIPMENT LOCATION
INSIDE HANDSET STATIONS
Locate stations where needed at convenient speaking height,
about 4.5 feet (137cm) from the finished floor. Handset
can be secured directly to the finished wall surface or can
be mounted over a single gang electrical 'gem' box or single
gang electrical plaster ring.
OUTSIDE STATION(S)
Locate door station(s) at convenient speaking height on
exterior wall near entrance. When using the NH201TVA
(stand alone) amplifier, all door stations must have the
proper speaker and electret condenser microphone installed
(model# TE-TT-201)
NH201TVA AMPLIFIER/POWER SUPPLY
The NH201TVA is usually located in a separate equipment
location. You can mount the NH201TVA by using the
provided plastic 'DIN' rail bracket, or by screwing it to the
mounting surface using the holes provided. It must be
located away from any source of direct heat or extreme
cold and in an accessible location. Keep at least 3 feet (1
meter) away from transformers, AC power wiring, trans-
formers, fluorescent lights, light dimmers and other electri-
cal devices. Protect cable from damage.
NH201TVA or NH201TT Amplifier and Power
Supply Installation and Use Instructions
Used with the HT3001 and/or HT2001 Series
Inside Handset Intercom Stations
Shielded cable should be used if interference is a concern.
DOOR RELEASE
Run 2 conductor #18AWG from the electric door release
location to the NH201TVA (or NH201TT) amplifier. If
distance is greater than 50 feet, use #16AWG cable. Use a
separate cable from the intercom cable, and route away
from any intercom wiring.
CONNECTIONS
Before connecting, make certain wires are free from shorts
or grounds. Make connections as shown on page 4 and as
detailed in the following instructions.
INSIDE HANDSET STATIONS
1. Connect terminals 'I' and 'II' on handset stations to
terminals 'I' and 'II' on other handset stations and to
terminals 'I' and 'II' on the amplifier.
2. Connect terminal 'S' on each individual handset station
to the corresponding push-button at the entry door
station, that is used to signal that handset station.
3. Terminals 'Z' and 'K' on each handset station are
optional terminals, and are only used if the 'Red Dot'
push-button needs to be used to operate an optional
function.
DOOR ENTRY STATION
1. Connect speaker/microphone terminals 'L1' and 'L2'
on door entry station to terminals 'L1' and 'L2' on the
NH201TVA amplifier.
2. Connect speaker/microphone terminals 'M1' and 'M2'
on door entry station to terminals 'M1' and 'M2' on the
NH201TVA amplifier.
NOTE: The NH201TT amplifier comes factory-wired
with the L1,L2,M1 and M2 speaker/microphone
connections already installed onto the amplifier.
TRANSFORMER
1. Connect transformer 16VAC terminals to the 16VAC
input terminals ('8' and 'II') on the NH201TVA or
NH201TT amplifier/power supply. Do not use this
transformer to power any other device, not included
on this system.
2. Do not plug SS105B transformer into electrical outlet
or connect SS106 transformer primary to 117 VAC
until entire installation is complete and checked.
