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3. Connections
MRKP2 to MX88 and Expansion Keypads
Each RJ-45 connector under each PREAMP OUT (1 – 8) is considered a “Zone
port”. This Zone port interfaces with MRKP2 Keypad through CAT-5 cables.
These connectors carry command/control information between the keypad and
the MX88. Connect CAT-5 cables terminated to an RJ-45 connector from each
Keypad to the corresponding RJ45 connector of the MX88 as shown below.
(See Specifications section for maximum length of Cat-5 cables)
Figure 3.0: MRKP2 to MX88 with expansion keypads
Zone 2Zone 1 Zone 8
MRKP2 Rear
Z
o
ne
4
IR emitter
Zone 1
IR emitter
MRC88m Rear
XANTECHCORP.
MRKP2- 050710000077
XANTECHCORP.
MRKP2- 050710000077
XANTECHCORP.
MRKP2- 050710000077
XANTECHCORP.
MRKP2-050710000077
XANTECHCORP.
MRKP2-050710000077
XANTECHCORP.
MRKP2- 050710000077
MRKP2 Rear
MRKP2
MAIN
KEYPADS
EXTENSION
KEYPADS
Rear
MRC44CB1
+
782ERGPS
MRC44CB1
+
782ERGPS
MRC44CB1
+
782ERGPS
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Note:
1. There are four keypads maximum per zone. Remove termination
jumper on all keypads except for the last keypad (see location of JP1
on Fig 2.4). Each expansion keypad must each have its own unique
address. (see Installer Settings menu on Section 4 of this manual).
2. Long CAT5 cable runs and/or the use of more than one keypad per
zone will require the use of MRC44CB1 and 782ERGPS High Current
AC adaptors. Please see Important Notes on page 6 and the
Specifications page for more details.
Internal IR Receiver
The internal IR receiver is located beneath the keypad’s face plate between the
POWER and “X” buttons (see Figure 2.3). The internal IR receiver receives IR
commands for the MRKP2 and for the MX88. It will also pass-thru IR remote
control commands to audio sources, via an emitter, to each of the sources
connected to the MX88. The internal IR receiver is interference friendly.
However, some optically noisy environments may require the use of an external
IR receiver. (See Figure 3.1 for details on using an external IR receiver)
Compatible Handheld remotes
The MRKP2’s can be controlled with a Xantech handheld remote controller,
such as a Xantech RC68 or MREM is for accessing control functions of the
source such as navigation, menu, and transport controls. Other programmable
Xantech remotes such as XTR39 can also be used. The list of RC68 codes is
available at www.xantech.com/Controls/KeypadsRemotes/Remotes/MREM, in
the Products page, under “MREM Code List”.
Note: RC68 commands may not be used with projects created in QuickConfig.