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- INSTRUCTIONS -
The NDR Lamp Memory and External Control System is designed for communication between a central master
station and remote intercom stations. In addition to communication to remote locations, an external device can be
activated, such as activating a CCTV camera when the associated sub station is selected, or selectively controlling
the corresponding door strike or maglock. All other features, functions, and components are the same as the
standard NEM system.
WIRING DIAGRAM: SYSTEM USED FOR CCTV CAMERA CALL-UP
NDR
NDR Lamp Memory Master Station with External Control Capability
NDR-10 NDR-20 NDR-30 NDR-40
NDR-10A NDR-20A NDR-30A NDR-40A
Individual Components for System:
NDR-n Master station with selective contact output capability (10, 20, 30, 40)
NDR-nA Master station w/handset and selective contact output capability (10, 20, 30, 40)
ND-20AS 20-call Add-on Selector with selective output capability
ND-40AS 40-call Add-on Selector with selective output capability
RY-PA Relay for selective output (1 per station requiring external contact)
PS-2420UL 24V DC, 2A Power Supply
N-series Any model sub station with NA- or NE- prefix
IMPORTANT:
1. RY-PA must be used for each additional contact
to isolate AC voltage from the intercom circuit.
2. Extra contact connections and L are on separate
terminal block. NDR-30/40 have two terminal blocks.
Special
Order
Products
1
2
3
~
20
E
H
+
-
NDR-20A
+
-
PS-2420UL
NE-NVP
Red
Blk
Grn
Grn
Leave green
jumper intact
Red
Blk
Grn
NA-NE
1
2
3
~
20 L
1
2
Blk
Wht
NE-DA
RY-PA
#1
RY-PA
#2
RY-PA
#3
BLK
BLK
BLK
YEL
YEL
YEL
External
Terminal Block
Normally Open contacts remain
closed as long as master has sub
station selected.
Closure for Station #1
Closure for Station #2
Closure for Station #3
Pg. 1
1
L
2
RY-PA
#1
BLK
H
+
-
RY-PA
#2
NEM Master
RY-PA
#1
RY-PA
#2
BLK
BLK
BLK
YEL
Momentary closure #1
YEL
Constant closure #1
YEL
Momentary
closure #2
YEL
Constant
closure #2
Equipment for each station that requires
both a constant closure and momentary
closure when a channel is selected:
2 RY-PA relays
1 Diode (1N4001)
DUAL FUNCTIONS FROM EACH CHANNEL:
Terminal Block
NDR TERMINAL DEFINITIONS:
+ Positive 24V DC
- Negative
1~40 Station number
E Common communication
H Positive output for constant closure
L Positive output for selective closure