Shure DFR22 Mute Control Connections, Gain Control Connections, Mute Control PIN Connections

ENGLISH

Mute Control Connections

For mute control, use either a latching switch or a momentary switch. The total resistance of the cable run from the switch to the DFR22 should be less than 100 ohms.

Figure 15 shows an example of how to connect either a latching
switch or a momentary switch to the Control Input pins to mute an
input or an output.	Switch	Ground
	(momentary or latching)
	MUTE CONTROL PIN CONNECTIONS
	Figure 15

Gain Control Connections

For gain control, use either a potentiometer or two momentary switches (one for gain up and one for gain down). If you want to have multiple sets of gain controls acting on the same inputs or out- puts, use momentary switches connected in parallel. Figure 16 shows a typical connection between a potentiometer and the Con- trol Input pins. Figure 17 shows a typical connection between two momentary switches and the Control Input pins.

When using a potentiometer, the total resistance of the cable run should be less than 100 ohms.

When using momentary switches, the total resistance of the cable run should be less than 100 ohms.

NOTE: As supplied, the DFR22 control pins are configured for use with a 10 Kohm audio taper potentiometer. However, you can use the Potentiometer Calibration Wizard in the DFR22 software to configure the DFR22 for use with any 10 Kohm, 20 Kohm, 50 Kohm, or 100 Kohm linear or audio taper potentiometer.

AMX / Crestron Control Connections

You can connect an AMX or Crestron controller to the back panel RS-232 port, using a Phoenix connector, or to the front panel RS-232 port, using a DB-9 connector. In either case, you only need to connect three wires: send, receive, and ground. See page 8 for the pinout of the RS-232 ports.

To access AMX/Crestron control codes for the DFR22, visit the DFR22 web page at http://www.shure.com/mixers/models/ DFR22.asp.

10kW Potentiometer

(Audio Taper)

GAIN CONTROL PIN CONNECTIONS USING A POTENTIOMETER

Figure 16

Switch

(momentary)

Switch	Ground
(momentary)

GAIN CONTROL PIN CONNECTIONS USING SWITCHES

Figure 17

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