Aiphone Car Speaker LDF 20C User Manual

Special  
Order  
Products  
LDF  
LDF Loudspeaker Master Station with External Control Capability  
LDF-20C  
LDF-40C  
LDF-20CA  
LDF-40CA  
- LDF SUPPLEMENT TO LAF-C/CA INSTRUCTIONS -  
The LDF Loudspeaker Intercom and External Control System is designed for communication between a central master  
station and remote intercom stations. The LDF is an expanded feature version of the LAF-C/CA system. All  
information regarding installation other than the external control functions is included in the LAF-C/CA instructions. In  
addition to communication to remote locations, external devices can be activated, such as activating a CCTV camera  
when the associated sub station is selected, selectively controlling the corresponding door strike or maglock, or both.  
WIRING DIAGRAM: SYSTEM USED FOR CCTV CAMERA CALL-UP  
LS-NVP  
Red  
LDF-20CA  
LS-NVP  
Red  
1
2
3
LE-DA  
1
NOTE:  
Leave jumper between E & - on master  
and subs when using 2 conductor  
homerun wiring IN SINGLE MASTER  
SYSTEM ONLY. Jumper BLK/GRN  
wires at LS-NVP in 2-wire system.  
~
Blk  
Grn  
Blk  
Grn  
E
-
20  
E
-
External  
Terminal Block  
CONSTANT CLOSURE:  
Normally Open contacts remain closed as  
long as master has sub station selected.  
RY-PA  
#1  
1
2
Constant Closure for Station #1  
YEL  
BLK  
RY-PA  
#2  
Constant Closure for Station #2  
YEL  
BLK  
3
~
20  
RY-PA  
#3  
YEL  
Constant Closure for Station #3  
BLK  
L
PS-1225UL  
Terminal Block  
DUAL FUNCTIONS FROM EACH CHANNEL:  
+
-
+
-
RY-PA  
1
BLK  
Momentary closure #1  
YEL  
YEL  
#1  
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
2 Diodes (1N4001)  
RY-PA  
#1  
2
Momentary  
closure #2  
YEL  
YEL  
BLK  
LDF Master  
RY-PA  
#2  
Constant  
closure #2  
Individual Components for System:  
BLK  
+
-
LDF-nC  
Master station with selective contact output capability (20, 40)  
Master station w/handset and selective contact output capability (20, 40)  
20-call Add-on Selector with selective output capability  
40-call Add-on Selector with selective output capability  
Relay for selective output (1 per station requiring external contact)  
12V DC, 2.5A Power Supply  
LDF-nCA  
LD-20AS  
LD-40AS  
RY-PA  
PS-1225UL  
LE-series  
LS-NVP  
Any model sub station with LE-prefix  
Vandal proof sub station (add SBX-NVP for surface mount)  
LDF TERMINAL DEFINITIONS:  
+
-
Positive 12V DC input, and constant closure output  
Negative  
IMPORTANT:  
1~40  
Station number  
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. LDF-40C/CA has two terminal blocks.  
E
R
L
Common communication  
Occupied LED control  
Positive output for selective closure  
(Located on terminal block)  
Pg. 1  
 

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