PTI LEF-5 Manual

The following are instructions for connecting PTI Remote Keypad with Intercom, CodeXpress with Intercom and APEX Access
Devices with intercom to the Aiphone LEF-5 or LEF-10 Open Voice Selective Call Intercom Base Station. There are two
options for this connection (Single LEF Intercom Base Station and LEF Dual Intercom Base Station). Planning and installing the
wiring of a site is a process that requires a high degree of technical knowledge, PTI recommends that this be done by a
knowledgeable, trained professional. Please read this entire document before proceeding. Follow these steps in order. If you
have questions about installing or troubleshooting the LEF, contact Aiphone technical support by telephone at (800) 692-0200,
by email at Tech-Serv@aiphone.com or on the web at www.aiphone.com. If you have questions about PTI access devices,
please contact our Technical Support Department by telephone at (480) 941-1513 or by email at support@ptiaccess.com.
Warning – Incorrect installation of electrical components can result in damage to electronics as well as personal injury.
Warning – Failure to follow prudent installation guidelines and concepts can result in long-term problems.
Warning – Crosswiring DC+ to DC– or to common (E) will damage the electronics.
Warning – Crosswiring Intercom + to Intercom – or to common (E) will damage the electronics.
Warning – Introducing AC power into the LEF Intercom Base Station will damage the electronics.
Warning – Running Intercom wires in the same conduit as high voltage will generate noise on the intercom.
Option I – Single LEF Intercom Base Station
This is the most common LEF Installation with 1 – 10 remote intercoms and one LEF 5 or 10 Base Station Unit in the office.
Please note, the LEF-5 and LEF-10 look very similar, differing only in the number of screw terminals on the terminal block.
1. Run a separate 18awg, 2 conductor, shielded cable from the LEF Intercom Base Station to each remote intercom
location. Strip back the outside insulation and inner foil layer of the cable approximately 2" from each end, being
careful not to damage the bare shield wire or the insulation around either conductor. 2 spade connectors and 2 wire
nuts/crimp connectors are required for each remote. Spade connectors, wire nuts, and/or 3M crimp connectors must be
provided by the installer. The maximum distance per Aiphone is 1600' with 18 awg wire.
2. At each Keypad with Intercom or CodeXpress with LEF Intercom, connect the Intercom + (generally the Red wire) to
the Red + wire coming from the intercom button in the Keypad or CodeXpress. Connect the Common (E) wire to the
Black/Green wires coming from the speaker and intercom button in the Keypad or CodeXpress. Use a wire nut or 3M
UY2 connector for to make these splices. Wrap the splice connection with electrical tape to seal it. See Correct
Splicing Techniques document.
3. At each APEX Series Access Device with LEF Intercom, connect Intercom + and Intercom – wires to the tan intercom
terminal block. This terminal block is located in the Upper left hand corner of the circuit board, next to the speaker,
directly below the black terminal block containing all of the speaker and intercom button wire connections. Strip the
Intercom + and Common (E) wires back ¼". Insert the Intercom + wire in the top (1) position on the tan terminal block
and tighten down the screw connection. Insert the Common (E) in the center (E) position on the tan terminal block and
tighten down the screw connection. On the APEX circuit board, slightly above the tan terminal block and to the right of
the black terminal block is a jumper. Verify that the jumper is set to "LEF Single Station".
4. At each Remote (APEX, Keypad with Intercom, CodeXpress with Intercom), fold back the bare shield wire even with
the insulation on the cable and wrap electrical tape around the end of the insulation to make sure that the bare shield
wire and foil insulation cannot touch the components inside the remote. If the intercom is receiving interference or has
noise on it, one or both ends of this bare shield wire can be tied to the Common (E) to help reduce interference.
Z:\Quick Documentation\Intercoms\Aiphone\LEF\LEF 5 & 10 Intercom Connections.doc – last updated 02/26/03 rsl
PTI Integrated Systems
LEF-5 & Lef-10 Intercom Connections
Technical Support Form
LEF-5 & LEF-10 Intercom Connections
8271 East Gelding Drive Scottsdale, AZ
85260
Phone: 480-941-1513
3817
1 of 9
Fax: 480-346-