Configuration; Wiring Diagram - Shure MX300 Serie Guia Del Usuario

Configuration

DIP Switches
Use the DIP switches to configure logic settings
and mute button behavior.
The DIP switches are covered with a piece of
clear tape at the factory. Remove tape to modify
the switch settings.
Note: Bottom cover must be closed for micro-
phone to function.
OFF (factory ON
default)
1 Momentary Toggle
2 Push-to-mute Push-to-talk
3 Mute button enabled, Disable mute button
LED illuminates when (microphone always
mic is active on), logic controls
LED
4 -- --

Wiring Diagram

NOTE: Audio and logic ground are connected at
microphone base.
Audio – (Black)
Audio + (Red)
LED IN (Orange)
SWITCH OUT (White)
Ground (Green)
Mute Button Configuration
Use DIP switches 1 and 2 to configure the mute
button, as follows.
Be sure to set DIP switch 3 off (factory default)
so that the mute button controls audio from the
microphone.
Switch Function DIP Switch Setting
Momentary: push-to-mute
(as shipped).
Momentary: push-to-talk
Toggle: (Push On/Push
Off): Mic is active when
powered on
Toggle: (Push On/Push
Off): Mic is mute when
powered on
Connecting to an Automatic
Mixer
Use these settings if connecting the microphone
to an automatic mixer or other device that mutes
audio and controls the LED.
1. Connect logic leads to the automatic mixer.
Connect the LED IN to the gate output to
illuminate the LED when that channel is gated
on.
2. Set DIP switch 3 on. This disbles the mute
button (the microphone passes audio regard-
less of whether the button is pressed or not).
3. Set DIP switch 1 to configure how the mute
button sends SWITCH OUT logic:
Momentary:
push = 0 Vdc,
initial = 5 Vdc,
release = 5 Vdc
Logic Wiring (MX392)
Green (LOGIC GROUND): Connects to the
logic ground of an automatic mixer, switcher, or
other equipment.
Orange (LED IN): Set DIP switch 3 on to use
LED IN. When shorted to LOGIC GROUND, the
LED turns on.
White (SWITCH OUT): Provides TTL logic
(0 Vdc or 5 Vdc) in response to the mute button.
Set DIP switch 1 for momentary or toggle. When
phantom power is applied, logic initializes high
(5 Vdc). DIP switch 2 has no effect on SWITCH
OUT.
Changing SWITCH OUT to
Always Momentary
Use the following modification in situations
where your logic interface requires momentary
closure of the SWITCH OUT, but you want the
mute button to toggle the microphone (DIP
switch 1 ON, 3 OFF):
1. Access the circuit board inside the micro-
phone base.
2. Remove the resistor at R45 and reinstall it at
location R46.
Toggle:
push = 0 Vdc
5