Appendix C - Paralleling Inputs; Cabling Parallel Inputs - AMX Modula Instruction Manual

Appendix C – Paralleling Inputs
Important: The system must have been ordered to handle parallel inputs to use these directions.
This appendix contains directions for cabling and operating a paralleled system that switches composite
(or Y/c) over BNC connectors. Parallel systems must contain standard video high impedance (Hi-Z) input
boards (either FG1034-461 or FG1034-458) in all enclosures except for the last enclosure, which must
contain standard video (not Hi-Z) input boards. For more information, contact an AMX representative.
A Modula's switching capability can be expanded by paralleling ("splitting") inputs. Normally the input
connectors on one enclosure can only route a signal to the output connectors on that enclosure. However,
connecting an input on one enclosure to the corresponding input on a second enclosure with a
T-connector allows a source signal to be routed to all available output connectors for that signal on both
enclosures. By paralleling inputs on two enclosures each with a 32x32 configuration, the set of configuration
possibilities expands to 32x64.
The source signal must be routed on different levels for each enclosure; therefore, the system must be
configured in XNConnect so the enclosures switch on different virtual matrices (levels); see page 168.
Note: Splitting a signal more than four times requires a distribution amplifier.

Cabling Parallel Inputs

Caution: When video signal inputs are paralleled, all enclosures must contain standard video high
impedance (Hi-Z) input boards except for the last enclosure, which must contain standard video
(not Hi-Z) input boards.
To parallel inputs between two enclosures:
Important: Signal cable B in FIG. 107 needs to be approximately 3.0 in. (7.6 cm) long.
Signal cable C should be just long enough to reach from enclosure to enclosure.
1. Fasten a T-connector to signal cable A, which comes from the source device.
A
Source signal cable
FIG. 107
Connecting two inputs for parallel control
2.
Fasten one end of signal cable B to the T-Connector.
Fasten the other end of signal cable B to the input on the first enclosure.
3.
Fasten signal cable C to the open end of the T-Connector.
Fasten the other end of signal cable C to the corresponding input on the second enclosure.
The source is ready to switch to outputs on both enclosures (for information on controlling parallel
inputs, see page 169).
Modula Instruction Manual
B
T-Connector
C
Appendix C – Paralleling Inputs
Input boards in first enclosure must be
standard video high impedance (Hi-Z)
Input boards in last enclosure must be
standard video (not Hi-Z)
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