1、 TIA-604-4-B (Revision of TIA-604-4-A) September 2004FOCIS 4 Fiber Optic Connector Intermateability Standard- Type FC and FC-APC TIA-604-4-B-2004 APPROVED: SEPTEMBER 9, 2004 REAFFIRMED: JANUARY 29, 2014 NOTICE TIA Engineering Standards and Publications are designed to serve the public interest throu
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6、fore its use. (From Project No. 3-3417-RV2-RF1, formulated under the cognizance of the TIA TR-42 Telecommunications Cabling Systems, TR-42.13 Subcommittee on Passive Optical Devices and Fiber Optic Metrology). Published by TELECOMMUNICATIONS INDUSTRY ASSOCIATION Technology (b) there is no assurance
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19、UNDAMENTAL ELEMENT OF THE USE OF THE CONTENTS HEREOF, AND THESE CONTENTS WOULD NOT BE PUBLISHED BY TIA WITHOUT SUCH LIMITATIONS. TIA-604-4B FOCIS 4B FIBER OPTIC CONNECTOR INTERMATEABILITY STANDARD TYPE FC and FC-APC Contents 1 INTRODUCTION 1 2 ADAPTER STANDARD 3 3 PLUG STANDARD 5 4 APPLICATIONS 7 5
20、POLARIZATION MAINTENANCE 7 i TIA-604-4B iiTIA-604-4B FOCIS 4B FIBER OPTIC CONNECTOR INTERMATEABILITY STANDARD Type FC and FC-APC (From TIA Standards Proposal No. 3143 formulated under the cognizance of TIA FO-6.3, Subcommittee on Fiber Interconnecting Devices.) This document is part of the series of
21、 test standards included within TIA/EIA-604, Fiber Optic Intermateability Standards (FOCIS). 1 Introduction 1.1 Scope FOCIS 4a presents the intermateability standard for connectors with the commercial designation FC and FC-APC, and includes requirements for PM fiber connectors. This standard is issu
22、ed as an addendum to TIA/EIA 604, Fiber Optic Connector Intermateability Standards,. The provisions of TIA/EIA 604 apply to this document. 1.2 Objective Intermateability standards define the minimum physical attributes of mating connector components. Fully dimensioned components are not within the s
23、cope or intent of FOCIS 4a. The requirements in FOCIS 4a have been selected with the objective of ensuring that any combination of plugs and adapters conforming to the requirements of FOCIS 4a will mechanically intermate, and that intermated connector assemblies will meet a common level of performan
24、ce. The common level of performance of an intermated connector assembly is the least demanding set of performance requirements in the separate performance specifications of each of the products in the assembly; see TIA/EIA 604. 1.3 Limitations Realization of the objectives for FOCIS 4a may be limite
25、d by the following considerations: 1.3.1 Configuration Options There are configuration options for both plugs and adapters in FOCIS 4a that impose limitations on the combinations of plugs and adapters that should be combined in a connector assembly. For the plugs to be inserted in the adapter the ke
26、ying option, k, for both plugs must be compatible with the keying option of the adapter. Both plugs should have the same ferrule diameter option, t. An assembly with different diameter options may have a higher loss than anticipated. Both plugs should have the same angle of contact option, a. An inc
27、rease in loss may be expected if plugs with different contact options are mated, and the polish on the ferrules may be damaged. 1 TIA-604-4B 1.3.2 Common Performance The following considerations limit the application of common performance: The location of the optical cores, figure 3.2.1, and of the
28、apex offsets, clause 3.2.4, are defined, without tolerances, by their true positions. To apply common performance the distributions of the actual positions of these features should be centered on their respective true positions. Tuning of the connector plugs may improve performance when plugs are ma
29、ted with plugs that have been similarly tuned. Tuning, however, offsets the cores relative to the center of the ferrule and common performance can not be expected between tuned plugs and untuned plugs. Tuned plugs are assembled so that the offset of the fiber falls in a preferred location with respe
30、ct to the key, see clause 3.2.7. As an alternative to tuning for fiber offset, plugs could be tuned for apex offset. This standard does not control the intrinsic loss that may occur between fibers in a connector assembly. Intrinsic loss between fibers must be added to the basic connector loss 1.3.3
31、Resolution Cases of combinations of plugs and adapters where mechanical intermateability or the common level of performance is not achieved should be resolved through the cooperation of the user and the connector and adapter manufacturer(s). 1.4 Drawing practices To be in compliance with ANSI and IS
32、O Engineering Drawing Practices, the following shall apply: 1. Where a tolerance of form is not specified, the limits of the dimensions for a feature control the form as well as the size. The combined effects of size and form variations may not exceed the envelope of perfect form at the maximum mate
33、rial condition (MMC). 2. Where interrelated features of size (features shown with a common axis or center plane) have no geometric tolerance of location or runout specified, the limits of the dimensions for a feature control the location tolerance as well as the size. When interrelated features are
34、at the MMC they shall be perfectly located to each other as indicated by the drawing. 3. Where perpendicular features (features shown at right angles) have no geometric tolerance or orientation or runout specified, the limits of the dimensions for a feature control the orientation tolerance as well
35、as the size. When perpendicular features are at the MMC they shall be perfectly oriented to each other as indicated by the drawing. 4. As the size of a feature departs from the MMC, variations in form, location and orientation are permissible. 2TIA-604-4B 2 ADAPTER STANDARD 2.1 Adapter designation T
36、he designation for a FOCIS 4 adapter is: FOCIS 4B A-n-k-m where A designates that it is the adapter; n is the number of fibers; k defines the keying configuration; m defines the mounting configuration. 2.2 Adapter requirements FOCIS 4 adapters shall meet the requirements of this section. 2.2.1 Adapt
37、er interface dimensions The dimensional requirements for FOCIS 4 adapters are defined in figure 2.2.1, Simplex Adapter Interface. 2.2.2 Adapter sleeve The adapter sleeve may be either solid or split (resilient), and the sleeve may be either fixed or floating within the adapter. The minimum inside di
38、ameter of the sleeve is specified by the force required to remove a gage pin from the sleeve. The force required to remove a gage pin from the sleeve in a FOCIS 4 adapter shall not exceed 5.89 newtons (600 gf.) The procedures of FOTP 158 shall be used to measure the withdrawal force. Gage pin diamet
39、ers are specified in Table 1. Table 1 - Gage pin diameters Sleeve Type Minimum Diametermm Maximum Diameter mm Split, Resilient 2.4985 2.4995 Solid 2.5000 2.5005 The maximum inside diameter of the sleeve is in effect limited by the common level of performance that the adapter is to achieve. 3 TIA-604
40、-4B 2.2.3 Adapter mounting options The adapter mounting options are: m=0 unspecified mounting, simplex or duplex; m=1 mounting flange mounting with screws; m=2 mounting with panel nut; m=3 mounting with panel nut; m=4 mounting with panel nut. FOCIS 4 adapters with m=1, m=2, m=3, or m=4 shall be capa
41、ble of being mounted on panels with the features defined in figure 2.2.3, Adapter mounting dimensions. The mounting features for plugs with m=0 are undefined. 2.2.4 Adapter keying options Keying refers to differences in the interface between FOCIS 4 plugs and adapters that affect the ability of plug
42、s and adapters to be connected or that alter the performance of the resulting connector assembly. Four key options have been defined: k=1 k=2 k=3 k=4 The dimensional requirements for these options are defined in figure 2.2.1. Adapters are to be mated only with plugs with the same k option. See claus
43、e 3.2.5 2.2.5 Number of fibers option Only a single fiber adapter, n=1, has been defined for FOCIS 4 adapters. 4TIA-604-4B 3 PLUG STANDARD 3.1 Plug designation The complete designation for a FOCIS 4 connector plug is: FOCIS 4B P-d-n-k-t-a where P designates that it is the plug; d defines the plug de
44、sign; n is the number of fibers; k defines the keying arrangement; t defines the ferrule diameter; a is the angle of contact. 3.2 Plug requirements FOCIS 4 plugs shall meet the requirements of this section. 3.2.1 Plug interface option There is one plug interface option for FOCIS 4 plugs. The require
45、ments for this interface are: d=1 The elements of the plug that control the interface with the adapter, for plugs offered under this option, must meet the dimensional requirements of figure 3.2.1, Plug Interface (d=1). 3.2.2 Ferrule extension and contact force The travel of the ferrule relative to t
46、he body of the plug and the spring force on the ferrule are defined in figure 3.2.2. 3.2.3 Ferrule diameter option Ferrule diameters for FOCIS 4 plugs are specified in table 2. Table 2 - Ferrule diameter (mm) t Min. Max. Fiber 1 2.4985 2.4995 SM2 2.498 2.500 MM 3 2.497 2.500 MM4 2.494 2.500 MM The f
47、errule tolerance t=1 is generally applied to plugs with single-mode fiber. The ferrule tolerances t=2 to t=4 are generally applied to plugs with multimode fiber. 3.2.4 Angle of contact option Contact angle is the angle that the plane of contact makes with a plane perpendicular to the axis of the fer
48、rule. The plane of contact is defined as plane A-A in figure 3.2.4. 5 Two Options have been defined for the contact angle: TIA-604-4B a=0, designates an angle of = 0 a=8, designates an angle of = 8 Requirements: For a=0, and a=8: The True Position for the The True Position for the apex is at the cen
49、ter of the ferrule as projected on the plane of contact in figure 3.2.4 ( = 0). See Clause 1.3.2. For a=8: the orientation between the key and the plane of contact to be as shown in figure 3.2.4. 3.2.5 Plug keying option Four keying options have been defined: k=1 angular contact option a=0 k=2 angular contact option a=8 k=3 angular contact option a=8 k=4 angular contact option a=0 or a=8 These keying options are defined for use with the respective contact options listed above. The dimensional requirements for these options are defined in figure 3.2.1. Plugs are to be
