Specifications

Modular I/O Configuration Guide122
Installation Considerations
MODE Switches
Push the MODE switches to the right to turn them ON or to the left to turn them OFF.
Setting BUS-EN
The output configuration is taken from the non-volatile memory.
• MODE-3 ON connects the outputs to the audio busses on power up.
• MODE-3 OFF disconnects the module outputs from the audio busses on power up.
Setting MASTER
If this module will be the master sync source in a IO93 or IO94 Frame, it must be placed in a red reserved slot. Select the input
to use as clock reference using the web browser interface.
• MODE-1 ON sets this module as clock master for the frame.
• MODE-1 OFF if this module is not clock master for the frame.
Setting REMOTE/LOCAL
The MODE-2 switch must be set to ON (LOCAL).
HD944 installation diagram
To avoid audio bus conflicts when installing or replacing a module and the configuration is unknown, disable the output
bus drivers by setting BUS-EN = OFF before inserting it. If all settings are done remotely and the unit fits into the frame’s
bus assignment scheme, remove it and set BUS-EN = ON.
To avoid overheating, do not place the HD944 close to the power supplies or the frame’s side panel.
MODE-4
MODE-1
MODE-2
MODE-3