BS EN 4660-004-2011 pdf download.Aerospace series Modular and Open Avionics Architectures Part 004 : Packaging.
4.3.6.2 Finishes and protective treatments
There shall be no sharp edges or other imperfections which could cause injuries during transport or maintenance.
Equipment metal parts including spares shall be either inherently resistant to or adequately protected against the corrosive actions to which the equipment may be subjected when in storage or during normal service life, as detailed in the appropriate environmental standard.
Ail materials used in the construction of the module shall be fungus inert or protected against fungal growth.
No device containing mercury or its compounds shall be used, in any state, in the construction of the module. The module shall not be exposed to any such material during testing.
4.3.6.2.1 Use of compatible materials
Dissimilar metals shall not be used in intimate contact unless suitably protected against electrolytic corrosion.
4.3.6.2.2 Anodlc treatment and plating
Copper and copper composite frames may be electroless nickel plated in accordance with MIL-C-26074. class 1, grade A.
Aluminium, aluminium alloy and aluminium composite parts shall receive protective treatments in accordance with the following Table 1:
For the original CFM, the detail specificaton revision letter and amendment number shall be left blank.
4.3,7.3 Module Certification Mark
All CFMs which meet the requirements of a detailed specification, shall carry the appropriate certification mark on the module header.
4.3.7.4 Module Name and Type
Each module shall have its name and type marked as specified, on the connector shell or frame. The name marked on the module shall agree with the name in the title of the detail specification, however abbreviations in accordance with that specification are permissible. The standardisation body is responsible for the generation of an approved name.
4.3.7.5 Vendor’s Module Identification
Each module shall be marked on the module header with either the vendors identification code or vendors name. The vendors code, if utilised, shall be a numerical code determined by the standardisation body. The vendors code shall be marked on each module as specified. No other module vendor’s part number shall be marked on the module.
4.3.7.6 Module Serial number
each module shall have a serial number Including the vendor’s designation as specified. The serial number shall be located on the top surface of the header used for marking the key code. The serial number shall consist of a number of digits with significant digits prefixed with zeros, as required. The serial number shall be affixed to the module prior to electrical acceptance tests.
4.3.7.7 Module Date Code
Each module shall be marked as specified, with a six digit date code on the module header, designating the week and year of manufacture. The first four digits of the code shall indicate the year of manufacture and the remaining two digits shall indicate the calendar week, When the number of the week is a single digit.
4.4.2 Module connector shell location
The connector shell shall be rigidly mounted on the module as shown in Figure 4 such that no part of the connector protrudes beyond the Side A and Side B surfaces of the module.
Any “float” required between the modules and the backplane at the connector shells shall be provided in the backplane part.
4.4.3 Connector Cavities, Inserts, Ferrules and Contacts
The connector shall incorporate three identical cavities with dimensions compatible with ARINC 600 shell size 1, Each cavity shall be capable of containing any one of the following, but not limited to, insert types:
— “Guided Optical” – Providing 4 MT fibre optic ferrules, each with 4, 8 or 12 fibre optic contacts.
— Electrical – Small signal – This insert will provide 40 size 22 electrical signal contacts.
Electrical – Power” This insert will provide 8 size 16 electrical power contacts.
The Electhcal Power contact arrangement shall allow “make lasUbreak first” operation when the module is respectively removed from or inserted into the rack.
4.4.3.1 Identification
The connector interface and cavity identification shall be as defined in Figure 4, contact and insert shall be as defined in Figure 5.BS EN 4660-004-2011 pdf download.