4
System 236E Installation Instructions
Electromagnetic Interference
Vibrating horns can produce electromagnetic interference (EMI).
While EMI will not damage the System 236E, it can cause transmission
errors and mis-dialing. To minimize EMI, install a 0.01 mfd, 100V
capacitor across the terminals of the horn.
The capacitor must be
located in
the horn
.
SWITCHED
AUXILIARY POWER
The Terminal labelled C provides the power common.
Terminal Label:
Aux & C
The AUX(+) Terminal provides a positive 9.3 - 14.0
VDC for auxiliary devices that require switched
power for resetting. Typical devices include
glassbreak and smoke detectors.
Terminal Label:
KEY+, C, & DATA
The control panel connects to the alphanumeric
or LED keypad with three data terminals. The
hookup of the LED keypad is shown below and
the Alphanumeric keypad connections are
shown on the next page.
Terminal Connections:
KEY (+)
Terminal (red) provides 9.8 - 14.0 VDC keypad power.
This terminal connects to the Vs terminal on the keypad.
C (-)
Terminal (black) is common. The common terminal is the
power return and connects to the GND terminal on the
keypad.
DATA
Terminal
(green) is for keypad data. This terminal
connects to the KDAT terminal on the keypad.
The KEY(+) circuit is electronically protected against overload
conditions by a self-resetting circuit. No user replaceable parts
are used.
Maximum wire length for connecting any keypad is 500' (152 m)
of 22 AWG (0.643 mm) copper wire.
The System 236E is capable of addressing up to seven Alpha and
four LED keypads. Each LED keypad uses 40 mA of current. Eacj
Alpha Plus keypad uses 64 mA of current. See
Available Power
for current limitations.
ARMING STATIONS
AUDIBLE OUTPUT
The BELL(+) Terminal (Audible output) provides up
to 600 mA at 9.5 - 14.0 VDC.
For UL installations requiring supervision of the exter-
nal bell, use the C&K Model 2350-SUP Bell Supervi-
sion Kit (P/N 0-000-231-11).
Terminal Label:
BELL & C
Available Power
The maximum total power available at the BELL(+), AUX(+), and
KEY (+) terminals is 800 mA. The switched auxiliary and keypads
share the same power bus. The combined power for the AUX(+)
and KEY(+) terminals is 400 mA.
Do not exceed 400 mA for all
keypads and auxiliary devices
.
DO NOT share the secondary of the transformer with other
devices. A foreign ground can damage the power supply,
voiding the warranty.
Precautions
DO NOT use any transformer other than that specified in
the AC POWER section above.
AC POWER
Terminal Label:
AC
AC power is supplied from a 16.5 VAC, 25 - 40 VA
transformer at 50 or 60 Hz.
A UL listed Class 2
transformer must be used
.
Connect the secondary of the transformer to the
terminals labelled AC on the System 236E. Use at least 18 AWG (1.02
mm) wire to reduce voltage drops.
The primary side of the
transformer must be connected to an unswitched receptacle.
Secure the transformer to the wall.
AC Power Failure
If an AC power failure lasts more than 15 minutes, the keypads will
display a system trouble. An AC failure report will be sent, if
programmed. When AC is restored for five minutes, a restoral report
will be sent.
The BELL(+) circuit is electronically protected against over-
load conditions by a self-resetting circuit. No user replaceable
parts are used.
Setting the Jumpers:
W1 and W2 select the keypad address (see page 5 for address-
ing information).
W3 installed -
Entry/Exit Pre-Alert tones ACTIVE
W3 removed -
Entry Pre-Alert tone is ACTIVE,
Exit Pre-Alert tone is INACTIVE.
May not be loaded
on all systems.
Connecting the LED Keypad:
