Interlogix NX-8 - Manual (Page 57)

NX-8 Control
57
TERMINAL DESCRIPTION
TERMINAL DESCRIPTION
R1 House Telephone Ring (Grey).
R Telephone Ring (Red).
T Telephone Tip (Green).
T1 House Telephone Tip (Brown).
EARTH Earth Ground. Connect to a cold water pipe or a 6 to 10 foot driven rod.
AC AC input. Connect to a 16.5V 25, 40 or 50 VA Class ll U.L. approved transformer.
BELL + &
BELL -
If used as a siren output(default), the speaker rating should be 15 watt at 8 or 16 ohm, or 30/40
watt at 4, 8, or 16 ohms. If voltage output is selected in location 37, this output becomes voltage
output, 12VDC, 1 Amp maximum load. NOTE: A 3.3K resistor may be required across the
bell terminals when a 12 VDC siren is used. If no resistor is used, you may experience
voltage leakage into the siren which will cause these devices to output a small signal.
KP DATA
Connect to the data terminal on the keypads and the expanders. Maximum number of devices
(keypads + expanders) is 32. See AMaximum Wire Run@ chart below.
KP COM Connect to the Common terminal on the keypads and the expanders.
KP POS
Connect to the POS terminal on the keypads and the expanders. This terminal and AUX PWR +
are limited to 1 amp total current when added together.
SMOKE+
Smoke detector power 12VDC, 1.5 amps maximum (For those jurisdictions which allow the
Priority zone to be used with smoke detectors.)
COM Connect negative wire of powered devices such as motion detectors and smoke detectors.
AUX PWR+
Connect positive wire of all powered devices except smoke detectors and keypads. This terminal
and KP POS are limited to 1 amp total current when added together.
ZONE 8
Connect to one side of zone 8 loop. Connect the other side to com terminal. Open or short causes
alarm. Zone 8 may be used for a two-wire smoke detector using a 680 E.O.L. resistor. W3
must be set for two-wire smoke detector loop. For normal zone operation, W4 must be set.
COM Common (-) terminal for zones 7 & 8. (See the wiring diagram for examples.)
ZONE 7
Connect to one side of zone 7 loop. Connect the other side to COM terminal. Open or short
causes alarm.
ZONE 6 -
ZONE 1
Connect as described for zones 7 & 8. Only zone 8 can be a two-wire zone. (See the wiring
diagram for examples.)
AUX 4 –
AUX 1
Connect negative lead of low current device [relay, LED(install 1k resistor in series with LED),
etc.]. Connect positive lead of device to AUX PWR +. Current is limited to 50mA when output is
negative, and 250 A when output is positive.
NETWORX KEYPAD MAXIMUM WIRE RUN
(Note: These numbers are for one keypad at the end of the wire. When connecting more than one keypad to the end of
the wire, a higher gauge wire will be required.)
WHEN CONNECTED TO NX-8 WHEN CONNECTED TO NX-320
Length in feet Wire Gauge Wire Gauge
250 24 22
500 20 18
1000 18 16
1500 16 14
2500 14 12