Aiphone N-20AS, N-40AS User Manual
0108
n
Add-on Selectors for the NEM Lamp Memory System
N-20AS, 20-call N-40AS, 40-call
- 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 acce ssories can be used in
conjunction with the add-on selectors. Each add-on selector requires a dedicated 24V DC power supply.
1
3
Individual Components for System:
NEM-n 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.
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2
NAMES & FUNCTIONS:
1. OFF button
2. Selector button
3. OFF LED
4. Directory card
5. Station selector LED
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
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.
Pg. 1
WIRING DIAGRAMS:
NB-L #41
NA-NE #42
Red
Blu
Org
Org
Grn
Blk
NAR-6A
BLUE
Red
Blu
Org
Org
Grn
Grn
Blk
N-20AS/
N-40AS
1
2
3
~
40
E
NEM-40/C
1
2
3
~
40
E
NA-A #1
A
B
C
D
E
NA-AN #2
A
B
C
D
E
NE-NVP #3
Red
Green
jumper
Blu
Blk
PS-2420UL
+
-
Brn
Red
Org
Yel
Grn
Blu
Vio
Gray
Wht
Blk
+
-
X1
X2
X3
X4
X5
X6
X7
X8
H
E
+
-
Add-on Selector
PS-2420UL
+
-
NEM with 40+ subs using NB-U’s for Background Music
NEM
PS-2420UL
+
-
Master
V1
A1
V2
A2
V3
A3
V4
A4
Y
E
B
H
+
-
BLK
BLK
RY-PA
20 Ohm, 5W
YEL
YEL
NB-U #1
V1
A1
V2
A2
V3
A3
V4
A4
Y
E
B
63
C
Wiring from
NB-U #2
Y
E
B
63
C
WIRING NOTE:
A sub station can be wired
either to the master or to
the add-on selector.
Amplifier
25V
MUSIC
SOURCE
PS-2420UL
+
-
N-20AS
V1
A1
V2
A2
+
-
V1
A1
V2
A2
Wiring connection between NEM master and add-on selector not shown on
this diagram. For those connections, see drawing at the top of this page.
Pg. 2
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