- INSTRUCTIONS -
The N-20AS and N-40AS add-on selectors are designed to function with the NEM Lamp Memory System, Type
"C" or later. Multiple add-on selectors can be added to a master station along with a variety of sub stations to
create a communication system tailored to a user's needs. All standard NEM system accessories can be used in
conjunction with the add-on selectors. Each add-on selector requires a dedicated 24V DC power supply.
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Add-on Selectors for the NEM Lamp Memory System
N-20AS, 20-call N-40AS, 40-call
Pg. 1
NAMES & FUNCTIONS:
1. OFF button
2. Selector button
3. OFF LED
4. Directory card
5. Station selector LED
SPECIFICATIONS:
Power Source:
24V DC. Use PS-2420UL.
Communication Output: 500mW at 20 ohms
Communication:
Push-to-talk, release-to-listen (TALK button), or VOX handset at master (handset models only).
Hands free at sub station.
All call output:
6W in a system of up to 20 sub stations
12W in a system between 21 and 40 stations.
Calling:
Master to sub: By voice only after pretone.
Sub to master: Call button on sub activates tone and LED, remaining activated until answered.
Wiring:
2 conductors homerun to sub station, or loop multi-conductor cable with 1 common wire
plus 1 individual wire per sub station on the wire run.
Shielded cable is recommended.
Use Aiphone #822202 (22AWG) or #821802 (18AWG) 2 cond.
Multiconductor: Aiphone #822210 (10 cond.), #822215 (15 cond.), #822220 (20 cond.)
Wiring Distance:
420' with 22AWG; 1,000' with 18AWG.
Individual Components for System:
NEM-
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Master station (10, 20, 30, 40-call sizes)
NEM-
nA
Master station with handset (10, 20, 30, 40-call sizes)
NA-series
Any sub station with NA, NB, or NE model number prefix
PS-2420UL 24V DC, 2A Power Supply
Other Accessory items listed in catalog or price list as compatible with the NEM series.
1
2
5
4
3
N-nAS TERMINAL DEFINITIONS:
+
Positive 24V DC
-
Negative
1~40
Station number
E
Common communication
V1-V4 Connects to NB-U for
A1-A4 Background Music
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