NEC DS1000 Correspondence Course Workbook page 58

DS1000/2000 Correspondence Course
DS1000 System Installation
58 DS1000/2000 Workbook
Installing the Analog Door Box
Do not connect an Analog Door Box to a digital station port.
The Analog Door Box (P/N 92245) is a self-contained Intercom unit typi-
cally used to monitor an entrance door. A visitor at the door can press the
Analog Door Box call button (like a door bell). The Door Box then sends
chime tones to all extensions programmed to receive chimes. To answer the
chime, the called extension user just lifts the handset. This lets the exten-
sion user talk to the visitor at the Door Box.
You can connect up to 2 Analog Door Boxes to your system. The base sys-
tem provides an Analog Door Box and associated relay at extension 324. If
you have the Expansion Board installed, you have a second Analog Door
Box and associated relay at extension 325. Analog Door Boxes do not add
to the System Load Factor.
Each Analog Door box also has an associated control relay. You can use
this relay to release an electric strike on the entrance door. After answering
the Door Box chimes, the extension user can press FLASH or a soft key to
enable the Analog Door Box's relay, which in turn unlocks the door. Refer
to Programming the Door Box on page 62 for programming information.
The Analog Door Box is a weather-tight unit, with an operating tempera-
ture range of -20 to 60 degrees C (-4 to 140 degrees F) and a relative
humidity of 10-95%, non-condensing.
Be sure the devices connected to the system's relay contacts are compatible
with the following specifications.
Contact Configuration. . . . . . . . . . . . . . . Normally Open
Maximum Load. . . . . . . . . . . . . . . . . . . . 0.5A @ 120 VAC
Maximum Initial Contact Resistance . . . 100 mOhms
!! Important !!
1 A @ 24 VDC
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