Alpha Communications® Misc. Specialty Products and Tools

Misc. Specialty Products and Tools

Ideal for Jails and other Penal Institutions. Each system can have two (2) to four (4) of these units wired in parallel. Heavy-duty armor cord and metal cradle switch/plate.

The Alpha Communications® TW202 series intercom stations are designed specifically for 2-way communications through a wall (or window), in applications such as prisons. Made from a heavy-duty armor cord intercom handset, solid chrome finish metal hook switch and .024" thick solid stainless steel mounting plate, these stations are made to last. A high sensitivity receiver and dynamic microphone assures crisp-clear voice communication.

The TW202 can be mounted flush on a standard 2-gang electrical back box, or it can be surface mounted on a standard 2-gang metal-mold or equivalent surface back box.

Color-coded pigtail wiring makes these stations easy to wire. Stations are available with Black Handset (model TW202BK) or with Grey Handset (model TW202GY). Normally used in pairs, up to four (4) TW202 units can be connected in parallel from a single NH908A power supply.

TW202 Series

FEATURES
• Simple operation. Just lift handset up and speak
• Rugged Stainless Steel mounting plate with Chrome finish metal hook switch.
• Heavy Duty Armor Cord Handset available in Black or Grey
• Easy Installation
• Automatic Duplex Communication. No buttons to press
• Clear Voice Fidelity using high quality receiver and dynamic microphone elements
• Mounts Flush or Surface
• Requires only 3 low-voltage wires (looped or home-run)

SPECIFICATIONS


Dimensions:	  4.75"W (121mm) x  4.63"H (118mm) x 1.0"D (25mm) (FACEPLATE ONLY).
Construction:   Solid .024" Thick Stainless Steel Faceplate.
Mounting:        Flush or Surface.	
     
ARCHITECTS' AND ENGINEERS' SPECIFICATIONS
The visitor intercom stations shall be Alpha Communications® model TW202BK (or TW202GY)
or approved equal. The handset shall have an armor cord and shall have a high-sensitivity receiver
and dynamic microphone, for excellent voice fidelity. Communication shall be full duplex type,
activated by lifting the handset off of its cradle switch. Color-coded pigtails shall be provided, and
required wiring shall be only three (3) common wires from each handset to the NH908A power
supply. Cradle switch shall be chrome plated solid metal type. Plastic cradle switches shall not
be acceptable. Contractor shall supply tamper-resistant screws and mounting hardware as
required. Handsets shall be flush (or surface) mounted over the appropriate electrical back box.
Contractor shall provide a model NH908A power supply and SS106 transformer for  each system
(and optional IH151N equipment cabinet).
	
	
REQUIRED COMPONENTS
TW202BK	VISITOR INTERCOM (with Black handset) or TW202GY (Grey handset). Each
	system can have two (2) to (4) units, wired in parallel. Mounts on customer supplied
	2-gang flush or surface electrical back box.
NH908A    AMPLIFIER/POWER SUPPLY. One (1) required per system of (2) to (4) TW202BK
	or TW202GY visitor intercom units. Requires SS106 or SS146 for 16VAC power.
SS106      16VAC PIGTAIL TYPE TRANSFORMER. U.L.Listed. Primary 120VAC.
----OR----


SS146      16VAC PLUG-IN TYPE TRANSFORMER. U.L. Listed. Primary 120VAC.            


	
OPTIONAL COMPONENTS
IH151N    U.L. listed (painted) steel enclosure, to protect and store the NH908A amplifier unit.
	
	
WIRING REQUIREMENTS
Run a 3-conductor #22AWG cable from each TW202BK (or TW202GY) intercom station, back to
the NH908A amplifier/power supply. This cable can be lopped from TW202 to TW202 and then to
the NH908A, or it can be home-run directly from each TW202 to the NH908A. Run a 2-conductor
#18AWG cable from the NH908A to the SS106 or SS146 low-voltage transformer, for power.