4
TYPICAL WIRING LAYOUT DIAGRAM
FOR A SINGLE ENTRANCE SYSTEM
Notes:
1. Use #18AWG wiring to transformer and door opener. All other wiring can be #22AWG.
2. Talk down volume can be adjusted using volume control (potentiometer) on NH201TVA (or NH201TT)
amplifier/power supply.
3. When connecting to a magnetic door lock or other 'fail safe' type door lock, use the optional model PK407A
specialty relay, for each entrance door lock.
4. If the NH201TVA amplifier is not mounted behind the entry door station, and is mounted remotely, we
recommend using shielded cable from the speaker/microphone wires to the NH201TVA amplifier/power supply.
5. Transformer wiring MUST NOT be in same cable as handset wiring!!!
6. Observe all local and national electrical codes.
7. All terminals connections shown may not be in the order that they appear on the equipment.
ALPHA COMMUNICATIONS®
• 42 Central Drive • Farmingdale NY 11735-1202
TOLL-FREE TECHNICAL LINE 1-800-666-4800
• Phone: 631-777-5500 • Fax: 631-777-5599
WEBSITE: www.AlphaCommunications.com • EMAIL: info@alphacommunications.com
