Alpha Communications® Amplifiers/Power Supplies/Accessories

Amplifiers/Power Supplies/Accessories

The NH208TVU is used with the HT2006 series S.T.R. handsets for handset to handset, and handset to one or more door stations, with or without door release.

The Alpha Communications®/S.T.R.™ NH208TVU amplifier/power supplies are used with the S.T.R.™ HT2006 series handsets, when handset to handset AND one or more door station communication is required. The HT2006 handsets that can be called from one or more doorstations must have the model R2006 Alphatone™ signal adaptor installed by the customer. The NH208TVU operates on 16VAC (30VA) low-voltage Class II wiring. For permanent transformer mounting use our Model #SS106 (U.L. Listed) transformer. For plug-in transformer connection use our Model #SS146 (U.L. Listed) transformer. These NH208TVU amplifier/power supplies are designed to easily surface mount right onto the finished wall by means of customer supplied screws or the convenient plastic 'Din Rail' bracket supplied with each power supply. Connections are positive screw terminal type.

NH208TVU

FEATURES
• Easily Installs Right on Finished Wall Surface or in Customer Supplied Housing
• Operates on Safe Low-Voltage Class II Wiring
• Clear Voice Fidelity with Adjustable Voice Volume Control
• Convenient Screw Terminal Connections

SPECIFICATIONS

Dimensions:
		Height:   2.375" (60mm)
         	Width:    4.25"  (108mm)
		Depth:    4.75"  (120mm) from mounting surface

Volume Control:  Adjustable potentiometer built-in.

		
Connections:	Screw Terminal Connectors.
   
ARCHITECTS' AND ENGINEERS' SPECIFICATIONS
The power supply/amplifier shall be Alpha Communications®/S.T.R.™  
model NH208TVU, or approved equal. Amplifier shall operate from a 16VAC 
(30VA) U.L. Listed transformer (SS106 or SS146). All wiring to power 
supply/amplifier shall be low-voltage Class II wiring, installed as per all 
federal, state, and local electrical codes. Power supply/amplifier shall 
surface mount right to the finished wall and shall be installed in a 
suitable environment that is free from excessive dirt, dust, temperature, 
humidity, grease and water. Power supply/amplifier shall provide the 
intercom amplification and signaling power for proper system operation. 
For most secure installation, power supply should be installed into a 
lockable equipment cabinet/housing. Power supply/amplifier shall be 
installed a safe distance from any source of electrical interference.


	
	
OPTIONAL COMPONENTS:
DO-001    	(or equivalent) 16VAC Door Release.

TU1007A  	Multi Entrance Audio Adaptor. Used when switching audio 
		(intercom) and door release between two (2) or more entrance 
		stations. Used in addition to system amplifier. Use one (1) for 
		(2) entrances, use two (2) for (3-4) entrances, use three (3) 
		for (5-6) entrances and use four (4) for (7-8) entrances. 
		No additional transformer needed.

R2006      	Alphatone™ Adaptor. Required to be field installed into 
		each HT2006 handset that will be called from any door station(s). 
		Used in NH208TVU type systems only.

PK407A   	Specialty Relay Adaptor. Used when connecting a door opener 
		other than a 16VAC type to system. One (1) required for each 
		building entry door opener. 
	 ------OR------
		Used when an individual HT2006 selective call button is needed 
		to trigger another signaling application other than an electric 
		buzzer signal. 
		One (1) required for each signaling application (per HT2006 button).

DV4         	4-Zone Paging Adaptor. Used in addition to all other system 
		components, when 	paging from one or more handsets is required. 
		Has 10W of audio output split between 1-4 zones. Output of DV4 
		can be sent into one or more public address amplifiers for larger 
		paging requirements. Each DV4 requires its own SS146 (40VA) 
		transformer.


	
	
WIRING REQUIREMENTS:
Wiring between handsets shall be 4-common #22AWG and 1 selective wire #22AWG, 
for each handset station connected on the system. For example, a system with 
8- HT2006/10 handsets would require 4-common and 8-selective wires for a total of 
12 wires (minimum). Then add 1-#22AWG wire for each handset pushbutton that will 
activate an electric door release, add 1-#22AWG wire for each pushbutton 
(at any entry door) that will selectively signal to one or more handsets connected 
to that pushbutton. In the illustration shown above for 8- HT2006/10 handsets, 
if you had an 8-button front entry panel and a door release you would add 1 door
opener wire, and 8 selective call button wires, for an additional 9 wires added to 
the original 12, for a minimum wiring requirement of 21 wires. Add one more 
#22AWG wire for each of the other HT2006 pushbuttons will be used for any 
other signaling purposes, such as paging, etc. See the individual system wiring 
diagram AWD057 for more complete wiring information.