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Model MX88 Page: 21
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“CONTROLLER” jack on the Secondary Keypad. Repeat for all keypads in zone (up to a total of 4
Keypads). Each of the 4 keypads or touch-panels within a zone must have a unique address that is not
shared by the other three keypads.
Zone Termination
The LAST keypad connected in the zone (Keypad with no other keypad plugged into its EXPANSION
port) must have the Zone Termination Jumper installed. Please see the keypad or touch-panel‟s
manual for specifics.
Sensor Enable
To disable the keypad or touch-panel‟s on-board IR Receiver, remove the Sensor Enable jumper on
the rear of the keypad. Please see the keypad or touch-panel‟s manual for specifics.
External IR Terminal Block
To conveniently add other Xantech IR Receivers or IR keypads (such as SmartPad or WaterPad) in
conjunction with the MX88 Keypads, you may wire 18AWG-24AWG 4-conductor wire, directly to the
terminal block on the rear of the Keypad. Please see the keypad or touch-panel manual for specifics. A
4-conductor connector is provided to safely wire the +12V, STATUS, IR IN and GND to the rear of a
compatible keypad or touch-panel. This might be useful when adding an external IR Receiver or adding
a sub-zone keypad either outdoors or in a bathroom (such as the WaterPad).
Note: The 12VDC output terminal is rated at 100mA and can power up to one SmartPad/WaterPad or
up to 4 IR Receivers. Any more then this will require the use of an external power supply. Do not wire
the external power supply to the MX88 keypad. Wire directly to the units to be powered.
The STATUS line is an output and is active High (+12VDC) when the MX88 Keypad is powered on and
is Low (0VDC) when the Keypad is off. Use this to provide Bank Tracking LED on the SmartPad,
WaterPad or another compatible device.
In Zone IR
To wire local emitters in-the-zone (emitters used to control components in the same general area as the
keypad), wire the IR OUT and GND terminals on the rear of the keypad or touch-panel to the IR (white
stripe) and GND of the emitter cable. To control numerous components in the same area, wire these
terminals to an amplified connecting block (such as Xantech 791-44) using 18-20AWG 2-conductor
cable.
ZONE EXPANSION (CONNECTING TWO MX88 CONTROLLERS)
For systems greater than 8 Zones, two MX88 Controller/Amplifiers can be linked together for systems up to 16
Zones.
LINKING TWO MX88 CONTROLLER/AMPLIFIER UNITS
To connect two systems, simply connect the supplied DB15 Expansion Cable to Port 1 on the rear of one unit to
the Port 2 on the other – Figure 3 item 30. Either and both of the Port 2‟s can be used for source/device
control, with our without RS2321x8 router.
CONNECTING SOURCE COMPONENTS
When connecting two units together, designate one unit as the PRIMARY Unit (Zones 1-8) and the other unit as
the SECONDARY Unit (Zones 9-16). All source components should be connected directly to the PRIMARY
Units Source A/V Inputs – Figure 3 item 22. Use the PRIMARY Unit‟s Audio and Video Loop-Thru connectors
– Figure 3 item 23 to feed the source component inputs of the SECONDARY Unit – Figure 3 item 22.
All of the source components emitters should be connected to the PRIMARY Unit‟s IR Emitter Output Ports –
Figure 3 item 26. This rule applies to the Sense Inputs also.