Installation guide

9
MOUNTING THE PANEL AND WIRING THE SYSTEM cont.
WIRING
Zones 1 through 100 are connected using D-LEMs, Q-LEMs, or COMBO LEMs. Determine
whether it is more economical to install D-LEMs or Q-LEMs given the number of zones required
versus the cost of either LEM unit. Note that the lowest address Q-LEM services zones 3, 4, 5,
and 6 and the highest address Q-LEM services zones 95, 96, 97, and 98 (See page 27). You
must, therefore, use D-LEMs for zones 1 and 2 and zones 99 and 100 (See page 25). Connect
the APLEX panel terminals 25 (LEM negative), 26 (LEM Clock), and 27 (LEM Data) to
terminals 1, 3, and 4 respectively of the first LEM. Connect 9, 11, and 12 of this LEM to 1, 3,
and 4 of the next LEM and so on. Refer to page 13 for a drawing of how a door contact, PIR,
etc., is wired to a zone input.
For additional wiring information, refer to page 13 for the D-LEM, page 23 for the C-LEM,
pages 21 and 22 for the Q-LEMs, and page 25 for the COMBO LEM. Ensure that all covers are
installed on the LEMs to close the tampers. Connect a 16- to 18-volt, 30-va minimum
transformer to terminals 34 and 35. Connect a 12-volt, 6-AHr minimum, standby battery to the
flexible leads provided. WATCH POLARITY!! Connect the red lead to the standby battery positive
(+ve) post and the black lead to the battery negative (-ve) post. At this time, the panel will
automatically start up and will probably stop when the display shows ENTER NAME/
ADDRESS ?. You may now proceed with the powering up of the panel. Refer to page 35.
SERVICING THE PRINTED CIRCUIT BOARD
To remove the printed circuit board for service, disconnect the AC source from terminals 34 or
35, disconnect a battery lead from the standby battery and then carefully lever up each terminal
strip with a thin, flat-blade screwdriver. Remember always to remove the power from terminals
34 or 35 and a battery lead and before attempting to lever off terminal strip 3. Do not unplug the
keyboard connector by pulling it by the ribbon cable. To loosen it correctly, lever the blue
connector plug to the left with a small, flat-blade screwdriver and then pull it free from the
header pins. The printed circuit board is secured by six nylon mounts. Squeeze the out-flanged
arm of each nylon mount with a pair of needle-nose pliers and gently pull up on the board. To
remount the printed circuit board, gently press each clearance hole on its nylon mount, push the
blue connector plug onto the 9-pin header, and then squeeze the 12-pin terminal strips back onto
the header pins.