– 4 –
3 PRECAUTIONS ON INSTALLATION & WIRING
CAUTION
★ Do not connect AC wires to any terminal on any unit, as fire or unit damage may occur. Connect only the specified
power source on +, – terminals.
★ Do not install more than one power supply (PS-1225UL) for an entire LEF system.
★ Do not attempt to install or connect wires on LEF equipment while system’s power supply is plugged in.
★ LEF masters and related equipment, except door stations, are designed for indoor use only. Do not install outdoors.
IMPORTANT
★ There is no need to disassemble the equipment for installation, other than to open the unit to connect the wires to the
inside of the back case. Do not access the PC board or components unless properly qualified.
★ Any other manufacturer’s products installed with this system (power supply, external signaling device, etc.) are not
covered under Aiphone’s warranty.
★ Do not mount LEF equipment in the following places, as it may cause the system to malfunction:
• Near light switches or dimmer switches, or near fluorescent light fixtures.
• Near alarm panels or other electronic equipment that may emit data noise.
• Behind a doorway or any other area that may block access to the unit.
★ LEF units are electronic devices, therefore must not be subjected to water or moisture.
★ Severe weather conditions, such as lightning storms, may cause damage to LEF equipment.
We recommend that power surge protection be installed as follows: (However, this does not guarantee that no
damage will occur).
• Connect the GROUND terminal of the power supply to an earth ground. In this case, a separate surge arrester is
not necessary.
• When using a power supply that has no GROUND terminal, install a surge arrestor near the output as shown.
• Additional SA-1 surge arrestors can be installed to protect communication lines. One SA-1 per 2 wires on each
master station.
Before actually installing the LEF system, the contents on pages 4 ~ 8 must be thoroughly read and understood.
To access the inside of the unit for making wire connections:
1. Remove operation plate and loosen the two screws on the front of the unit. (Do not remove screws)
2. Carefully lift front of intercom up and off the back chassis.
3. If desired, unplug connectors and set unit aside during mounting and wiring of the back chassis.
4. When wiring is completed, plug in connectors and put unit back together. Peel protective covering off of directory card.
To remove the operation
plate, push either left or
right side of the plate.
PS-1225UL
LEF model
DC 12V
Surge-
arrestor
(Aiphone model SA-1)
Install a surge-arrestor
(discharging voltage: 100~180V)
at a location closest to the unit,
taken to earth ground.
Grounded
OPERATION PLATE
PUSH
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