Specifications

Operating Manual - 24.24M Matrix Processor

can be used, with all switches sharing a common ground connection. The number below the nine pin Euro Block contact

closure connector equals the number of the preset which will be recalled when that switch is closed. Always use the

24.24M contact closure ground for contact closure switches. Do not connect the 24.24M contact closure ground to any

other external grounds, as ground loop currents may result.

5.5 0-5V Remote Level Control

Any of the inputs or outputs on the 24.24M can have their levels remotely controlled through this simple DC

control port. Use the provided +5VDC and Ground (pins 9 and 10), along with a potentiometer, switched resistor

network, or relay (for muting), to return a DC voltage to the desired input or output control pin. Using Protea System

Software, each pin can be assigned any combination of inputs or outputs to create up to eight remote control groups (see

sec 11.1).

The remote level control can only attenuate the signal, it can not provide gain, so properly set up the gain structure

within the 24.24M before using remote level control. +5V on any control pin has no attenuating effect, while 0V

referenced to the connector ground fully attenuates the signal. Do not connect the remote level control ground to any

other external grounds.

5.6 RS-232 Dataport

The 24.24M has two RS-232 dataports, wired in parallel, with one on the front panel and one on the back, for

connecting to a computer for software control. See section 7.3 for details on connecting to a computer.

5.7 Data In/Data Out Connection

The Data In and Out connectors are used for connecting the 24.24M to other Protea products under software

control, as well as SIA, Crestron, or other third party controllers. Control data for the 24.24M uses the RS-232 protocol,

and does not support the MIDI baud rate. Supported baud rates are 9600bps and 38,400bps.

5.8 RS-232 Mode Switch

The RS-232 mode switch is pushed in only when the 24.24M RS-232 Dataport is connected to a PC, and is the first

of several Protea products in a data chain (including an active remote).

5.9 AC Inlet and Power Switch

A detachable AC power cord is used on the 24.24M. Since the internal universal power supply works from 90 to

240 VAC 50-60Hz, the only change necessary for use with a different AC mains connection is the appropriate AC power

cord. The AC power switch is found on the back of the unit as well.