Allen&Heath DR66 USER GUIDE - Manual (Page 23)

DR66 & DR128 Installer User Guide 23
Remote Switches
The DR66 provides 12 opto-isolated remote switch inputs on a 25-way D-type female socket. The
DR128 provides 8 inputs on a 9-way D-type female socket. These are typically used to connect
momentary action switch contact closures to control the DR unit if required by the application.
For example, simple up/down volume and patch select controls could be mounted on a remote wall
plate. For alarm applications, a switch input could be assigned as a patch recall and triggered by
the installation alarm system. This patch could be configured to turn off all background music and
route an emergency evacuation message to all output zones.
The function of these switches is assigned in a similar way to the front panel function keys using
the WinDR editing software running on a PC. Refer to the Help file provided within WinDR for
details. Functions available include:
• Input or output channel level increment (Volume up)
• Input or output channel level decrement (Volume down)
• Crosspoint level increment (Source to zone local volume up)
• Crosspoint level decrement (Source to zone local volume down)
• Input or output channel mute
• Patch recall (Full or partial patch, for example source selection)
• Stereo linking of switch functions
Wiring Remote Switches Use a momentary action switch with normally open contacts. Use
shielded cable with the switch wires protected from interference by an outer shield. Use a male D-
type connector. Connect its shell to the cable shield. Wire the switch so that its contacts short the
associated pin to the 0V common when pressed. Alternatively, you can action the remote inputs
from external equipment such as an alarm system using relay contacts or remote facilities that
ground the connector pin.
DR66
Use a 25-pin male D-type connector.
Note that the remote outputs and back-up
battery input are also wired to this
connector. Pin 13 is the switch common.
DR128
Use a 9-pin male D-type connector. Pin 9
is the switch common.