Alpha IA543 Instruction sheet

1
IA543
Intercom Amplifier
Installation & Configuration Manual
The Alpha Communications® IA543 Intercom Amplifier is designed to allow two-way communications between
an open voice lobby panel and multiple apartments. Additional equipment will allow communications with
multiple entrance panels. Entrance panels will signal up to an apartment by pressing the corresponding call
button, and the resident can answer using TALK and LISTEN buttons. A DOOR button provided on the
apartment station can be configured to operate an electric door strike or magnetic lock to allow visitor entry.
The IA543 is compatible with additional equipment to provide specialized applications and features such as
hearing impaired strobe lights, multiple sequenced door operations, integration into access control systems,
and Postal locks.
INSTALLATION PROCEDURE
Read this manual to insure proper wiring, component placement, and installation methods.
WIRING REQUIREMENTS
Depending on the facility layout and number of apartments, inside stations may be connected by risers
comprised of common wires with selective wires from each inside location, or connected in a home run
method from each inside location. Apartment stations can be of the 3, 4, or 5 wire varieties and can be used in
combination if necessary.
Alpha Communications® 42 Central Drive Farmingdale, NY 11735-1202
Toll Free: 1-800-666-4800 Phone: [phone] Fax: [phone]
Website: www.AlphaCommunications.com Email: [email protected]
Copyright© 2010-2017AWD142 Alpha Communications® All Rights Reserved. AWD143 Rev. 3 (01/2018)
Pleasenote:Terminalidentificationsinthismanualmaynotbeshownintheactualorderthat
theyappearontheequipment.

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COMPONENT INFORMATION
APARTMENT STATIONS
Locate stations in a convenient location. Recommended height is 60” A.F.F. for most applications. If inside
stations are flush mount style, install proper back box or housing. Run appropriate wires with sufficient extra
length for ease of service and installation. Avoid mounting near kitchen areas where cooking grime may build
up. Avoid mounting near other electrical equipment that may cause electrical interference and static noise.
AMPLIFIER
Mount amplifier in a clean, dry area away from electrical equipment that could cause noise and interference on
the system. Entry panel back boxes may be used to house the amplifier in some installations providing they
will offer suitable protection from heat, dirt and moisture. Do not mount the power transformer within 3 feet of
the amplifier. Check all wiring for shorts and grounds before applying system power.
TRANSFORMER
The transformer must be mounted in a clean, dry area, and in accordance with all applicable codes, at a
distance of 3 to 80 feet (1 to 25 meters) from the amplifier using #18AWG wire. In cases where this distance
must be exceeded, use a heavier gauge wire to reduce voltage drop.
ENTRY PANEL(S)
Mount all entry panels in a suitable location protected from harsh weather and water. Although many panels
are weather resistant, the more protection you can provide, the longer the life expectancy will be. When
mounting flush style panels, always use protective back boxes or appropriate housings.
In the case of multiple entry systems, additional equipment, such as the IA502 or PK502B multi-entrance
adapter, may be required.
DOOR RELEASE
The IA543 easily allows several door release configurations. Always use a minimum of #18AWG 2 conductor
wire up to a maximum distance of 50 ft. (15 meters). In cases where this distance must be exceeded, use a
heavier gauge wire to reduce voltage drop.
Always run these wires separately from the entry speaker cable to prevent interference and noise.
Special applications may require additional hardware such as the PK407A isolation relay, or RY502A Dual Door
Timed Switcher Relay.
Some applications may require a separate power supply for the door release device. Please refer to the next
page for specific wiring and jumper positions.

When running any audio wiring please make sure not to run too close to any source of electrical interference, such as
fluorescent lights, ballasts, dimmers, other electrical wiring, electromagnetic interference (EMI), etc.

3
DOOR RELEASE DIAGRAMS
Set jumpers as shown in the chart below. This supplies 16VAC to the door strike through the K & D
terminals when the inside station DOOR Button is pressed.
The length of activation time is determined by the dipswitch settings (approx. 2, 10, or 25 seconds).
Set jumpers as shown in the chart below. This example shows the wiring for a Multi-Tap Transformer
(8/16/24 VAC) to supply 24VAC to a door strike when the inside station DOOR Button is pressed, while also
supplying 16VAC for system power. Pay special attention to the transformer wiring and terminal markings.
The length of activation time is determined by the dipswitch settings (approx. 2, 10, or 25 seconds).
Set jumpers as shown in the chart below. This configuration supplies continuous 24VDC to a magnetic lock
through the L+ & L- terminals which is shut off when the inside station DOOR Button is pressed allowing the
door to be opened. Insure that proper polarity is observed.
16VAC
DOOR
STRIKE
24VAC
DOOR
STRIKE
24VAC
DOOR
STRIKE
24VDC
MAG
LOCK

4
DOOR RELEASE DIAGRAMS - continued
Set jumpers as shown in the chart below. This configuration is used when a magnetic door lock has its own
dedicated power supply. The PK407A only provides a dry contact which in this Normally Closed mode, allows
voltage to flow to a magnetic lock through the B & A terminals. When the inside station DOOR Button is
pressed, the relay opens the circuit, disconnecting the power and releases the door. Insure that proper polarity
between the magnetic lock and its power supply is observed.
The length of door release time is determined by the dipswitch settings (approx. 2, 10, or 25 seconds).
USING THE
PK407A
ISOLATION
RELAY
for a
MAG LOCK
To use the PK407A as an isolation relay for a door strike with a separate power supply, the wiring and
j
umper settings are the same as above, except the wire going to the B terminal (Normally Closed) would go
to the A terminal (Normally Open) instead. This way power from the IA543 would close the connection to
apply power to the door strike and release the door.
USING THE
PK407A
ISOLATION
RELAY
for a
DOOR
STRIKE

5
Dipswitch
Functions
Jumper
Positions
Dipswitches #1 & #2 set the length of door release time for approx. 2, 10, or 25 seconds (See chart above).
Dipswitch #3 will provide a tone at the entrance panel when the call button is pressed.
(you must use ZW as your tone wire to the entry panel).
Dipswitches #4 & #5 allow the Postal Lock to release the door for 25 seconds independent of the #1 & #2 setting.
(works only with 4 wire stations).
Dipswitch #6, when OFF, will only allow the door to release for the time determined by the position of #1 & #2.
If ON, it will continue to stay on past the normal time delay until the DOOR Button is released.
Dipswitch #7 when OFF, will require the TALK button to be pressed before the DOOR Button will release the door.
If ON, the Door release can be activated without talking first.

6
MAIN SYSTEM DIAGRAM
The IA543 amplifier has two serviceable adjustments for Voice Volume and Tone Volume located through two
access holes on the front cover. Use a small screwdriver and do not use excessive force. Carefully turn
clockwise to increase the volume. High volume setting may result in feedback oscillation.
TYPICAL 4 WIRE STATION – BACK VIEW

7

8
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Website: www.AlphaCommunications.com Email: [email protected]
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