AIPHONE LDF-20C LDF Loudspeaker Master Station User Manual
- June 17, 2024
- AIPHONE
Table of Contents
AIPHONE LDF-20C LDF Loudspeaker Master Station
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 substation is selected, selectively controlling the corresponding door strike or maglock, or both.
WIRING DIAGRAM
SYSTEM USED FOR CCTV CAMERA CALL-UP
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 a
2-wire system.
CONSTANT CLOSURE
Normally Open contacts remain closed as long as the master has a station
selected.
Equipment for each station that requires both a constant closure and momentary closure when a channel is selected:
- 2 RY-PA relays
- 2 Diodes (1N4001)
DUAL FUNCTIONS FROM EACH CHANNEL
Individual Components for System
- LDF-nC Master station with selective contact output capability (20, 40)
- LDF-nCA Master station w/handset and selective contact output capability (20, 40)
- LD-20AS 20-call Add-on Selector with selective output capability
- LD-40AS 40-call Add-on Selector with selective output capability
- RY-PA Relay for selective output (1 per station requiring external contact)
- PS-1225UL 12V DC, 2.5A Power Supply
- LE-series Any model substation with LE-prefix
- LS-NVP Vandal proof sub station (add SBX-NVP for the surface mount)
IMPORTANT
- RY-PA must be used for each additional contact to isolate AC voltage from the intercom circuit.
- Extra contact connections and L are on separate terminal blocks. LDF-40C/CA has two terminal blocks.
DF TERMINAL DEFINITIONS
- + Positive 12V DC input, and constant closure output
- – Negative
- 1~40 Station number
- E Common communication
- R Occupied LED control
- L Positive output for selective closure
- (Located on the terminal block)
WIRING DIAGRAM
SYSTEM USED FOR SELECTIVE DOOR RELEASE
OPERATION
THE POWER SWITCH MUST BE ON FOR THE SYSTEM TO BE OPERABLE.
- When a station calls in, press the selector button corresponding to the lit LED.
- To speak to the person at the remote station, press the TALK button (or pick up the handset). Release the TALK button to hear a reply. Communication via the handset is VOX (voice actuated).
- If the extra contacts are used as shown in the “camera call-up” diagram, activating a device that is to remain on for the duration of the call, the station’s relay will stay activated as long as the selector button is depressed.
- If the extra contacts are used as shown in the “selective door release” diagram, press the “door release” button while the selector button is depressed. This will activate the corresponding relay as long as the button is being held, which will activate the door release mechanism.
- If both functions are used on a channel, the device connected to the “constant closure” relay will be on for the duration of the call. The “momentary closure” will only be active when the door release button is pressed.
- When the conversation is completed, press the OFF button to the left of the station selector button. Hang up the handset.
SPECIFICATIONS
- Power Source: 12V DC at master. Use PS-1225UL.
- Commun. Output: 800mW at 20 ohms
- Communication: Push-to-talk, release-to-listen (TALK button) or VOX handset at master.
- Hands-free at substation.
- Calling: Master to sub: By voice only
- Sub to master: The call button on the sub activates the tone and LED at the master.
- LED remains lit for 20 seconds, and the tone is momentary.
- Wiring: 2 conductors homerun to substation (single-master system only),
- or loop multi-conductor with 2 common + 1 individual wire per substation on wire run.
- Separate 2 conductors from RY-PA to an external device.
- A shielded cable is recommended.
- Use Aiphone #822202 (2 cond., 22AWG) or #822203 (3 cond., 22AWG) wire.
- Wiring Distance: 650′ with 22AWG; 1,600′ with 18AWG.
Aiphone Communication Systems
1700 130th Ave. N.E.
Bellevue, WA 98005
425-455-0510
FAX 425-455-0071
TOLL-FREE TECHNICAL SUPPORT
800-692-0200
TOLL-FREE FAX LINE
800-832-3765
E-MAIL: [email protected]