Allen & Heath DR-Switch--Switch Accessory

Allen & Heath DR-Switch--Switch Accessory
Allen and Heath DR Switch Accessory

DR-switch is an add-on unit for the Allen & Heath DR66 and DR128 digital mixers. It provides an additional 24 switch closure control inputs and 16 logic control outputs in a 1U high rack or desk mount case. Up to three units can be connected providing up to 72 additional switch and 48 additional logic controls. These can be custom wired by the installer to allow external equipment to control pre-determined mixer functions, or the mixer to control external equipment. Typical applications include room wall plates for local volume control and source selection, automatic control of room dividers, projection screens, media players, lamps and other equipment.

The inputs and outputs are opto-isolated to avoid problems with equipment interaction. Grounding the switch inputs using simple contact closures triggers the programmed mixer function.

The logic outputs are open collector and can be wired to use the internal reference voltage or an external power supply. These typically drive LED indicators, filament bulbs, relays and circuit logic. Wiring the interface should be carried out by competent installation personnel.

The switch and output functions are easily programmed using the WinDR software that configures the system.

The DR66/128 communicates with the DR-switch via an RJ45 serial connection running the Allen & Heath DRlink protocol. A standard 2 metre CAT5 STP cable is provided. However, you can use a cable up to 300 metres long letting you position the unit closer to the local switch wiring.

A pass through connection lets you network up to three units by daisy chaining them. An interface card needs to be fitted to the DR66/128 to provide the additional serial port. Installation is a straightforward process requiring removal of the DR66/128 top cover, fitting the internal option card provided and plugging on the cable harness supplied. Refer to Fitting Instructions sheet AP4615.

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