Shure A120S Manual

Shure Ikke kategoriseret A120S

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Side 1/2

A120S In-Line Switch User Guide

GENERAL

The A120S Accessory in-Line Switch can be used to add an

On/OFF, Push-To-Talk, Cough Button, or Transmitter-Relay

Keying function to a microphone or other device rated at up

to 3 amps ac (0.5 Adc) 125V, non-inductive load. The switch

has gold-plated contacts for reliable performance even in

low-current circuits. The switch is a double-pole double-

throw type for maximum versatility. Its push button combines

with a rotary knob to provide either spring-return momentary

or locking action.

The unit is supplied with a crimp-on strain relief tor 6.4mm

(0.25-in.) diameter cable and with a ﬂex relief for either large

or small diameter cables. The permanently attached belt clip

can be rotated on the case to any of four positions for the

most convenience in use.

OPERATION

Switch Function Rotary Knob Position

On/Off (Button remains down

until depressed a second time)

Push-To-Talk (Button remains

down only while depressed)

Locking

Momentary

Locking the Switch Button Down

The switch button can be locked down by following these

steps:

Turn the rotary knob to Locking.

Press the switch button down.

Turn the knob to Momentary.

The button will remain locked down until the knob is returned

to locking and the button is depressed again.

SWITCH INSTALLATION AND WIRING

For thicker cable (e.g., one 6.4 mm [0.25 in.] diameter

cable or two 3.8 mm [0.15 in.] diameter cables), cut

off the bottom of the ﬂex relief at the rib. For narrower

cable (e.g., one 2.3 mm [0.39 in.] diameter cable),

use the entire ﬂex relief as supplied. Thread the cable

(s) through the ﬂex relief.

THICKER OR MULTIPLE

CABLES

SINGLE NARROWER

CABLE

FLEX RELIEF

FIGURE 1

For one 6.4 mm diameter cable (0.25 in.), crimp the

strain relief to the cable making sure the eyelet is to-

ward the raw end of the cable. Leave enough raw

cable above the strain relief to permit soldering the

individual conductors to the switch terminals.

NOTE: For all other cables, loosely knot the cable above

the ﬂex relief to form a strain relief. Leave enough raw

cable above the knot to permit soldering the individual

conductors to the switch terminals.

KNOTTED STRAIN RELIEF

6.4 mm (0.25 in.) CABLE

STRAIN RELIEF FOR ONE

FOR OTHER CABLES

FIGURE 2

SHURE Incorporated http://www.shure.com

United States, Canada, Latin America, Caribbean:

5800 W. Touhy Avenue, Niles, IL 60714-4608, U.S.A.

Phone: 847-600-2000 U.S. Fax: 847-600-1212 Int’l Fax: 847-600-6446

Europe, Middle East, Africa:

Shure Europe GmbH, Phone: 49-7131-72140 Fax: 49-7131-721414

Asia, Paciﬁc:

Shure Asia Limited, Phone: 852-2893-4290 Fax: 852-2893-4055

Solder the conductors to the switch terminals to

obtain the desired function (see Figure 3 for switch

conﬁguration.) Take care no to leave long bare

conductors that may bridge across terminals and

make unintended connections.

NOTE: When the switch is used to make connections in the

middle of a cable run, It is very important to preserve continuity

in the cable shield. If a splice is necessary for this, be sure it is

insulated from other terminals, or you may employ an unused

switch terminal to make the connection. Leaving the shield dis-

continuous may cause undesirable hum in a circuit.

TERMINAL SIDE OF SWITCH

FIGURE 3

Assemble the switch by inserting the tab on the

bottom back of the switch into the slot in the upper

case front. (See Figure 4)

Insert the ﬂange in the ﬂex relief into the slot be-

tween the case bottom and the small horizontal

projection.

If the strain relief is used, align its hole with the hole

in the center boss in the lower case front. Align the

cable to one side of the boss.

NOTE: If the cable is knotted to provide a strain relief, the center

boss in the case may be inserted through the center of the knot

with the cable lying to the side of the boss.

ASSEMBLING THE SWITCH

FIGURE 4

Use the three provided thread-forming screws to fas-

ten the case back to the case front, making sure not

to pinch any leads. (If the strain relief is used, make

certain that it is captured by the screw through the

lower center back of the case.)

Produkt Specifikationer

Mærke:	Shure
Kategori:	Ikke kategoriseret
Model:	A120S

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