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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-2410A 24V DC, 1A Power Supply for 10-20 station systems
PS-24E 24V DC, 2A Power Supply for 30-40 station systems
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-2410A
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