Manual

227 PRO X User Manual
Appendix E: I/O Modules
There are three module slots (to the right of the rear panel of the PRO X) into which any combination of the following modules can be tted:
• DL441 analogue input module; see “DL441 analogue input module”.
• DL442 analogue output module; see “DL442 analogue output module”.
• DL443 analogue insert input/output module; see “DL443 analogue Jack I/O module”.
• DL444 analogue D-type input/output module; see “DL444 analogue D-type I/O module”.
• DL452 digital in/out (AES/EBU) module; see “DL452 digital I/O module”.
Details of how to replace a module can be found in Appendix F “Replacing A Module”.
DL441 analogue input module
The DL441 analogue input module provides eight balanced line (or mic) inputs. Its rear panel houses eight input XLRs, each with a check and a 48 V LED.
The line inputs may be used as simple unity gain inputs to the PRO X, such as insert returns. However, there is also provision for gain adjustment in 5 dB steps from
-5 dB to +40 dB. This allows very high signal levels to enter the system and means that the same hardware can be used for mic inputs, if required by the system.
When used for microphones the input can also provide 48-volt phantom power.
Item Description
1 Eight XLR analogue mic/line inputs.
2
Green check LED illuminates to show when a channel is selected on a console. These are
controlled by the console and are used as a visual aid to locate specic connectors.
3 Red 48 V LED illuminates to show that 48 V phantom voltage is on.
2
3
1
DL441 module connectors
Functional block diagram of the DL441 module