Wiring and Connections
40
Metreau Keypads Instruction Manual
Remote Amplifier Configuration
In some cases, where the distance between the Matrix Controller and the zone is unusually long, it is sometimes desirable to have a
remote amplifier at the zone end. You may install a DAS-LLC to accomplish this task or you may build your own. FIG. 33 shows the
construction of a simple circuit of discrete components to reduce the Matrix Controller output to “line- level” so that it can be fed
into an auxiliary amplifier.
Two-Wire Configurations – Keypad for Control Only
In some retrofit configurations it is not feasible or possible to re-route the speaker cable through the keypad. In cases such as this,
it is possible to run a separate cable pair (CAT-3 / CAT-5 / Twisted Pair) cable from the Matrix Controller to the keypad for control
purposes.
When using CAT3/CAT5 over long runs, it is recommended to "double-up" the control wires (only 2 conductors are required, and
there are 4-8 wires available).
FIG. 34 shows the connections of the control signal path to the keypad, and the speaker connections to the Matrix Controller.
FIG. 33
Remote Amplifier Configuration
FIG. 34
2 Wire Configurations - keypad for Control Only
Matrix Controller
Zone Output Terminal Connector
Left RCA Jack to Amp
Right RCA Jack to AMP
R1
R2
R3
R4
R1, R3 = 47K 1/4 Watt Resistor
R2, R4 = 10K 1/4 Watt Resistor
Left Audio
Right Audio
Data
Ground
Metreau keypad
+
-
+
-
Left
Right
Cat5/Cat3/Twisted Pair
L D G
R
Zone Output Connector
(on Matrix Controller)
