Special
Order
Products
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
- 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
NE-NVP
Red
NDR-20A
NA-NE
Red
1
2
3
NE-DA
1
~
20
Blk
2
Blk
Grn
Grn
Grn
Leave green
jumper intact
Blk
E
Wht
External
Terminal Block
RY-PA
#1
1
2
Closure for Station #1
BLK
YEL
Normally Open contacts remain
closed as long as master has sub
station selected.
RY-PA
#2
Closure for Station #2
BLK
YEL
BLK
3
~
20
RY-PA
#3
YEL
Closure for Station #3
L
Terminal Block
DUAL FUNCTIONS FROM EACH CHANNEL:
H
PS-2420UL
RY-PA
#1
1
BLK
Momentary closure #1
YEL
YEL
+
-
+
-
Equipment for each station that requires
both a constant closure and momentary
closure when a channel is selected:
2 RY-PA relays
RY-PA
#2
Constant closure #1
BLK
L
1 Diode (1N4001)
RY-PA
#1
2
Momentary
closure #2
YEL
YEL
BLK
NEM Master
RY-PA
#2
Constant
closure #2
BLK
Individual Components for System:
H
NDR-n
NDR-nA
Master station with selective contact output capability (10, 20, 30, 40)
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
NDR TERMINAL DEFINITIONS:
+
-
Positive 24V DC
Negative
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.
1~40 Station number
E
H
L
Common communication
Positive output for constant closure
Positive output for selective closure
Pg. 1
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