AMM A320F | CONNECTORS INSERT ARRANGEMENT - DESCRIPTION AND OPERATION

A. Procedure

(1) This section gives additional information related to the connectors used on the CFM56-5B engine harnesses. It contains a description of the connector, part number information, diagrams of the various connector insert arrangements, the number of contacts required for the connector, and size of the contact.

(2) The following connectors are covered in this chapter:

(a) EN2997 series 3 elecctrical connectors,

EN2997 Connector ** ON A/C NOT FOR ALL

(b) MS3459 series electrical connectors.

MS3459 Connector ** ON A/C NOT FOR ALL

(3) The insert arrangement is determined by the connector shell size and the number, and size of the contacts used in the connector.

(4) The listing on the following pages gives examples of typical connector part numbers and the different elements which make up the connector part numbers.

A. EN2997

The EN2997 Series connector is a European Standard Part Number for a connector which is made to conform to specification MIL-C-83723 Series 3, Class K, Type T.

B. MIL-C-83723

MIL-C-83723 - Military Specification: Connectors, electrical, circular, environment resisting, receptacles and plugs.

C. EN2997SE61212

EN2997SE61212FN is an example of a typical part number.

EN2997 - SE - 6 - 12 - 12 - F - N

------ -- - -- -- - -

! ! ! ! ! ! !

! ! ! ! ! ! -------------- POLARIZATION

! ! ! ! ! ------------------ CONTACT TYPE

! ! ! ! ---------------------- CONTACT ARRANGEMENT

! ! ! --------------------------- SHELL SIZE

! ! -------------------------------- SHELL STYLE

! ------------------------------------ CLASS

------------------------------------------- SERIES DESIGNATION

EN2997 Series Designation:

En 2997 Connector, fire resistant, passivated stainless steel, crimp contacts,

with RFI grounding ring.

SE Class:

S = Sealed receptacle with housing (shell) in passivated stainless steel.

Crimp contacts. Fire resistant, maximum operating temperature 200°C.

SE = Sealed receptacle with housing (shell) in passivated stainless steel.

Crimp contacts. Fire resistant, maximum operating temperature 260°C

cyclic.

6 = Shell Style:

02 = Designates a quare flange mounted receptacle

06 = Indicates a self-locking plug.

12 - Shell size:

8, 10, 12, 14, 16, 18, 20, 22

The 12 at this location indicates a size 12 shell in accordance with the

requirement of MIL-C-1554 for miniature circular connectors (for a

selection of sizes).

EN2997 (MIL-C-83723), Series 3, Type "T" Electrical Connector Insert - Arrangement ** ON A/C NOT FOR ALL

12 - Contact Arrangement:

The "12" indicates the contact arrangement. Used in conjunction with the

shell size, (12-12). This designates a size 12 shell with 12 size 20

contacts.

For a complete listing of available insert arrangement.

EN2997 (MIL-C-83723), Series 3, Type "T" Electrical Connector Insert - Arrangement ** ON A/C NOT FOR ALL

F - Contact Type:

Contacts for this connector are available in pin (P), or socket (S)

configuration. For standard pin and socket part numbers and sizes.

F = Female (socket)

M = Male (pin)

Standard Contacts for EN2997 (MIL-C-83723) Series 3 Connectors - Table 3 ** ON A/C NOT FOR ALL

N - Polarization:

For alternate positions of insert arrangements, (polarization).

EN2997 (MIL-C-83723) Series 3, Type "T" Electrical Connectors Insert - Arrangement - Table 1 ** ON A/C NOT FOR ALL

EN2997 (MIL-C-83723) Series 3 Alternate Keying Positions - Table 2 ** ON A/C NOT FOR ALL

A. MS3459

The MS3459 series connector is described as a connector, plug, electrical, self-locking coupling nut, rear release, crimp contact. The MS3459 series connector designation indicates a standard circular connector which conforms to specification MIL-C-5015G.

(1) MS3459-KT189PW is an example of a typical part number:

MS 345 - 9 - KT-12S - 3 - P - W

-- --- - -- --- - - -

! ! ! ! ! ! ! !

! ! ! ! ! ! ! -------------- INSERT CLOCKING POSITION

! ! ! ! ! ! ------------------ CONTACT STYLE

! ! ! ! ! ---------------------- INSERT ARRANGEMENT

! ! ! ! --------------------------- SHELL SIZE

! ! ! ------------------------------- CONNECTOR CLASS

! ! ----------------------------------- SHELL STYLE

! ---------------------------------------- SERIES STYLE

-------------------------------------------- PREFIX DESIGNATION

MILITARY SPECIFICATION

MS = Military Specification, Prefix Designation.

345 = Series Style: The "345" refers to the connector series based on

Military Standard as showm below:

MS3459 Cable connecting plug with self locking nut.

9 Connector Configuration:

9 = Plug, cable connecting with selflocking nut.

KT = Connector class:

K = Firewall rated, complete fluid resistance, service life of 1000 hours

at 125°C continuous operation, silicone insert material, with a

steel shell and electroless nickel finish.

T = Shell material:

T = Ferrous alloy with cadmiun plate (class K).

12S - Shell Size :

10S, 12S, 14S

Contacts for MS3459 Series Connectors Table 4 ** ON A/C NOT FOR ALL

3 - Insert arrangement:

10SL-3, 12S-3, 14S-3.

MS3459 Series Connectors Insert Configuration by number of Contacts ** ON A/C NOT FOR ALL

P - Contact style:

P = Pin

S = Socket.

W - Insert clocking position:

Leave blank for normal; Alternate positions W, X, Y, and Z.

EN2997 (MIL-C-83723) Series 3, Type "T" Electrical Connectors Insert - Arrangement - Table 1 ** ON A/C NOT FOR ALL