Rev. 3 - 0505
Copyright© 1997-2005, Alpha Communications®, All Rights Reserved Elvox is a Registered Trademark of Paso Sound Products Inc.
42 Central Drive • Farmingdale NY 11735-1202 • Phone (631) 777-5500 • Fax (631) 777-5599
TOLL-FREE 1-800-666-4800 • Web: www.AlphaCommunications.com • Email: email@example.com
Due to continuous product improvement, all colors, sizes, materials,
finishes and specifications are subject to change without notice.
ARCHITECTS' AND ENGINEERS'
The power supply/amplifier shall be Alpha Communica-
tions®/Elvox™ model 931, or approved equal. Amplifier
shall operate from a standard 120VAC power source. All
other wiring to power supply/amplifier shall be low-volt-
age Class II wiring, installed as per all federal, state, and
local electrical codes. Power supply/amplifier shall sur-
face 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 in-
stalled into a lockable equipment cabinet/housing. The
931 is designed to be used with the 870W, 8870 and 902
series apartment handset intercom units (or equivalent).
Power supply/amplifier shall be installed a safe distance
from any source of electrical interference.
Contractor shall observe all local and national electrical
and building codes.
931 Amplifier/Power Supply
The Alpha Communications® 931 amplifier/power supplies are
used with the 870W, 8870 and 902 series handset intercom
stations (or equivalent), to provide intercom amplification,
power to operate the electric door opener(s) etc., and power to
signal the handsets from the lobby entrance station.
The 931 units each require a standard 120VAC power source.
These 931 amplifier/power supplies are des