Shure manual Logic Connection Specifications, Logic ground is distinct from UC4 audio ground

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LOGIC CONNECTION SPECIFICATIONS

The logic capability of the UC4 receiver provides two functions: transmitter status indication (which can be used to signal and control other events) and transmitter low battery indication. The various logic functions and their applica- tions are presented in the following table. Refer to Figure 28 below for pin mapping.

Pin No.

Function

Transmitter Status

Logic Level

Typical Applications

Connections

1

Signals or controls

On

Low (0V)

•

Drives a remote LED.

Tie the transmitter status

other events.

Off

High (+5 V)

•

Provides remote indica-

pin to podium mic mute in-

put terminal on the automat-

100 mA of

tion of transmitter status

ic mixer

current

when used with a Room

Tie receiver logic ground to

sinking

Control System (i.e.,

mixer logic ground.

provided.

Crestron or AMX)

• Activates external equip-

ment (equalizer, signal

processor, loudspeakers,

etc.) when used with a

Room Control System.

•

Transmitter status control

muting/unmuting of an in-

put channel on automatic

mixer. Used with auto-

matic mixers, such as

Shure Model SCM810

2

Logic Ground*

––

––

––

Make all logic ground con-

nections to this pin, includ-

ing the power supply

ground of external logic cir-

cuitry. To avoid switching

noise, do not connect logic

ground to audio, chassis, or

rack grounds.

3

Remote indication of

Good Battery (1–8 hours of

Low (0 V)

•

Drives a remote LED to

transmitter battery

battery life remaining)

light when battery is low.

status.

Low Battery (1 hour of less

High (+5 V)

•

Indicates low transmitter

of battery life remaining)

battery status on remote

control panel when used

with a Room Control

System.

*Logic ground is distinct from UC4 audio ground.

SCM810 MIXER DB 25 LOGIC CONNECTOR

UC4 LOGIC CONNECTOR

GATE 1

GATE 3

GATE 5

GATE 7

LOGIC

MUTE 1

MUTE 3

MUTE 5

MUTE 7

GROUND

OVERRIDE 2

OVERRIDE 4

OVERRIDE 6

OVERRIDE 8

LOGIC GROUND

PIN 1: TRANSMITTER STATUS OUT

PIN 2: LOGIC GROUND

PIN 3: TRANSMITTER LOW BATTERY

	MUTE 2	MUTE 4	MUTE 6	MUTE 8
	GATE 2	GATE 4	GATE 6	GATE 8
OVERRIDE 1	OVERRIDE 3	OVERRIDE 5	OVERRIDE 7

TYPICAL UC4 CONNECTIONS TO SCM810 MIXER LOGIC CONNECTOR

FIGURE 28

NOTE: For more information on logic functions, please contact the Shure Applications Department.

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