Xantech mrc88 Off, Zone Expansion Connecting TWO MRC88 Controllers Expanded

Model MRC88 Page: 31

Keypad Address Setting

Application	JP1	JP2
First (or Single) Keypad in Zone	OFF	OFF
(Primary Keypad connected
directly to MRC88 Controller)
Second Keypad in Zone	OFF	ON
(Connected to Primary
keypads Expansion Port)
Third Keypad in Zone	ON	OFF
(Connected to Second
keypads Expansion Port)
Fourth Keypad in zone	ON	ON
(Connected to third keypads
Expansion Port)

Table 1 – MRC88 Keypad Address Settings

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 – Figure 5-(18).

Sensor Enable

To disable the Keypads on-board IR Receiver, remove the Sensor Enable jumper on the rear of the keypad – Figure 5-(19).

External IR Terminal Block

To conveniently add other Xantech IR Receivers or Keypads (SMARTPAD or WATERPAD) in conjunction with the MRC88 Keypads, you may wire 18AWG-24AWG 4-conductor wire, directly to the terminal block on the rear of the Keypad – Figure 5-(23). A 4-conductor screw-type removable connector is provided to safely wire the +12v, STATUS, IR IN and GND to the rear of the Keypad. This might be useful when adding a Plasma Friendly (or other) IR Receiver (490-90 etc.) or adding a sub- zone keypad either outdoors or in a bathroom (WATERPAD Keypad).

Note: The 12VDC output terminal is rated at 100mA and can power up to one SMARTPAD/WATERPAD Keypad or up to 4 IR Receivers. Anymore then this will require the use of an external power supply. Do not wire the external power supply to the MRC88 keypad. Wire directly to the units to be powered.

The STATUS line is an output and is active Hi (+12VDC) when the MRC88 Keypad is powered ON and is LOW (0VDC) when the Keypad is OFF. Use this to provide Bank Tracking LED on the SMARTPAD/WATERPAD keypad or other.

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 MRC88 Keypad –Figure5-(22)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 (Xantech 791-44) using 18-20AWG 2-conductor cable. A 2-conductor screw-type removable connector is provided.

ZONE EXPANSION (CONNECTING TWO MRC88 CONTROLLERS) (EXPANDED)

For systems greater than 8 Zones, two MRC88 Controller/Amplifiers can be linked together for systems up to 16 Zones. Zone expansion is only available in Advanced programming configurations.

© 2003 Xantech Corporation