Matrix System
®
51
A. DIP Switch – Using binary code, designates Component Selection Numbers for each
Switching Module (e.g. Module 2 in Speaker Chain, Positions 8–15). See Appendix A for
DIP Switch setting instructions.
B. LED – Indicates that this Module is activated (active or bypassed).
C. Component Turn-On Relays – On the 1442, these relays switch power to selected
components. Not present on the 1440.
D. Control Cable Connectors – Supplied Control Cables are connected to these to connect
the first Switching Module in a Chain to the MVP Control Panel, then connect Module to
Module within a Chain.
E. Component Turn-On Strip – Distributes power to components when they are selected.
Not on 1440.
F. Power and Ground Connector – Provides connection points for 12 VDC power and
power supply ground to Module.
G. LED Turn-On Strip – For non-lighted components (e.g., Speakers), LEDs can be
mounted by the Speaker to indicate activation. When a Position is selected, a contact is
made and the Turn-On Strip provides power to the LEDs.
H. High-Level Connectors – Provides connection points for component high-level inputs and
outputs.
I. High-Level Bus Connectors – connects Switching Module to Switching Module within a
Chain, and Chain to Chain to form a bus.
J. Speaker Coil Shorting Pins – When Module is used to switch Speakers, placing jumpers
on these pins prevents out-of-phase cone vibrations by shorting all non-selected Speaker
coils.
K. Current Limiters – Used to prevent excessive current draw through relay modules. A
resettable fuse opens when the audio output of a component exceeds 10 amps for up to
10 seconds. The audio is then diminished in volume until the fuse resets itself.
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