RA70B14B【PDF 84/333 页】CONN JACK R/A 3-COND DBL CLOSED

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JACK SCHEMATICS

JACKS AND PLUGS

FAX: 773 792-2129

* Please visit the product pages on our website for the most up-to-date product information

JACK SCHEMATICS

79

Circuit Types: Jacks normally have through circuits, shunt

circuits, and/or isolated switching circuits, either individually or

in various combinations. The chart below shows schematics of

39 common jacks - many more combinations are possible, but

these are the most commonly used. A basic description of the

switching action of each jack accompanies each schematic.

Military Identification: Military specifications covering phone

jacks use a special code to describe jack functions. Jack

schematic descriptions are coded J-1 through J-13 (as

Notation

1-A

1-B

1-C

1-D

Meaning

One, SPST switching circuit. Also known as NO

(normally open) or “make” circuit.

One, SPST switching circuit. Also known as NC

(normally closed) or “break” circuit.

One, SPDT switching circuit. Also known as transfer

or “break” before “make” circuit.

One, SPDT switching circuit. Also known as “make”

appropriate) to coincide with Federal Item Identification

Guides for Supply Cataloging. One or more groups of suffix

numbers/letters identify isolated switching circuits used.

Suffixes identify the switching by industry recognized notation,

i.e., 1-A, 1-B, 1-C, 1-D, etc. See chart below.

before “break” circuit.

NOTE: Number indicates the quantity of circuit - 2-A means 2, A circuits.

Terminals locations shown on jack schematics do not necessarily coincide

with physical locations on jacks. Not all circuit types available on all jacks.

Single open circuit. (J1.)

Single closed circuit,

Single closed circuit. (J4).

Double open circuit. (J2).

Single open circuit.

sleeve common. (J3).

Isolated switching

“make” circuit. (J1-1-A).

Transfer circuit. (J5).

Tip closed, ring

open. (J10).

Tip closed, ring open

(common to sleeve). (J6).

Single open circuit.

Isolated switching

Double closed circuit,

ring common to

“break” circuit. (J1-1B).

sleeve. (J13).

Single closed. Isolated

switching “make”

circuit. (J4-1A).

Double open circuit.

Isolated switching–

separate “break” and

Double closed

circuit. (J7).

Single closed circuit

Isolated switching

“break” circuit. (J4-1B).

Single closed circuit.

Isolated switching

transfer circuit. (J4-1C).

Single closed circuit–

“make” before

“break”. (J8).

Double closed circuit.

Isolated switching

“break” circuit. (J7-1B).

Single open circuit.

Isolated switching

transfer circuit. (J1-1C).

Double open circuit.

Isolated switching

transfer circuit. (J2-1C).

Double open circuit.

Isolated switching

“make” circuit.

make circuits (J2-1A-1B).

(J2-1A).

Double open circuit.

Isolated switching–

separate “make”

circuits on both tip and

ring. (J2-2A).

Double closed circuit.

Isolated switching

“make” circuit on ring

spring. (J7-1A).

Single closed circuit

plus “make” before

“break”. Isolated

switching–“make”

before “break”

Single open circuit.

Isolated switching–

separate transfer and

“make” circuits.

(J1-1A-1C).

Single closed circuit.

Isolated switching

“break” circuit. Sleeve

common to isolated

switching circuit throw.

circuit. (J8-1D).

DIMENSIONS ARE FOR REFERENCE ONLY

Inch

(mm)

(J4-1B).

SWITCHCRAFT, INC. 5555 N. Elston Ave. ? Chicago, IL 60630

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