Installation guide

12
Terminal 27 is the LMTC (LEM-line) data line returning a series of nominally 6-volt pulses
from the LEMs to be decoded by the panel.
Terminals 30 and 31 are used to connect the standby battery negative and positive respectively.
Flexible wires terminated with Faston lugs have been provided. Connect the red lead to the
positive (+ve) post and the black lead to the negative (-ve) post. Watch the polarity. A zener
diode on the panel will fail short circuit if the polarity is reversed! No extra chances!!
Terminals 32 and 33 provide an auxiliary 12 volts (actually 13.6 volts) DC, fused at 1.25 amp
(Fuse 2), used for powering C-LEMs, remote keypads, PIRs, glass breaks, etc. Should this fuse
fail in service, we recommend replacing it with a 2.0-amp fuse. You may obtain a package of
five fuses by ordering product code 3310 from your distributor or from electrical retailers
carrying the BUSSMAN or LITTLEFUSE line (BUSS product code GMA 2 or LITTLEFUSE
211.2). Note: The ULC listing for the APLEX panel is based on the operation of the standby
battery for 24 hours. This condition is met when a suitable battery is used. See the chart below to
determine the required battery capacity. If you use the auxiliary power terminals, the standby
battery capacity must be increased to provide for the extra load current.
Terminals 34 and 35 are used to connect a 16- to 18-volt AC, 37-va minimum transformer.
L Terminal 36 must be connected to a cold-water pipe or Hydro ground using a heavy-gauge wire
(18 ga. or 16 ga.) routed over the shortest possible distance. A solid, direct connection is
essential for effective operation of the lightning-protection devices on the printed circuit
board.
COMMS TERMINAL STRIP/J TERMINAL STRIP - MK4/MK3/MK2 PBS
The Comms terminal strip, or J terminal strip as it was designated on earlier revisions, is used for
telecommunications. Please notice that it reads from the bottom up.
Terminal 37/J21/J21 is a signal ground (-ve). Connect this terminal to pin 7 on a serial-input
printer.
Terminal 38/J22/J22 supplies +12 volts DC to power other serial devices, auto-dial modems, etc.
This terminal is connected directly to the positive battery and is not fused. Short circuits
on this terminal will rupture tracks on the printed circuit board. If extending the wiring
beyond the panel, you must install some type of fusible link.
Terminal 39/J23/J25 is the transmit line for serial ASCII data and connects to pin 3 (Rx data) of
a serial-input printer. It is not true RS-232C, as this line is not held to a negative level in the
absence of data. If true RS-232C is required, then a EUROPLEX Model 1405 RS-232C adapter
NOTES CONCERNING THE TERMINAL CONNECTIONS cont.
must be used.