Corcom Product Guide. Introduction
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1 Introduction Corcom brand SignalSentry filtered modular jack series product combines different levels of filtering with and modular jacks to solve signal line noise problems and crosstalk. Corcom brand SignalSentry filtered modular jack series product has expanded into 80 different products for filtering the signal line, including inductor and capacitor, shielded, ganged, low profile and surface mountable versions. Designs not only save valuable panel space, but also place the filtering elements where they can be most effective in eliminating RFI. The L and N series and jacks offer filtering with inductance and optional shielding, while the LC and LCT series combine inductance with 82pF or 820pF capacitors. The X and Z series complete the offering with unfiltered versions of our standard profile and low profile jacks. Use the selector chart to combine your filtering performance with the or jacks. Mechanical dimensions are listed following the series information. For the latest information and additional technical articles, find Corcom products on the Internet at 242
2 SignalSentry Filtered s Corcom brand SignalSentry filtered modular jacks are a space saving and cost-effective solution to RFI problems on signal lines. Its inductive and optional capacitive elements effectively strip common-mode noise from the incoming signal, and at the same time limit the signal line s ability to radiate emissions like an antenna. The SignalSentry filtered modular jack series has expanded into 80 different products for filtering the signal line, including inductor and capacitor, shielded, ganged, low profile and surface mountable versions. Filtered RJ jacks provide interference suppression at the optimal location by integrating the filtering into the RJ jack itself. Our new ganged jacks are the only filtered ganged jacks available in the market. SignalSentry filtered modular jack products are useful for any electronic equipment that sends or receives data on unshielded twisted pair or other multi-conductor cabling systems. Modems, PBX s, LAN, ISDN, and local I/O interfaces that use RJ connectors are all candidates. Jack design and component selection compatible with equipment registered under FCC part 8. Applications A fax/modem board was being certified for FCC Class B emissions at an independent test laboratory. The board caused every computer it was tested in to exceed the radiated limits above 30 MHz, at multiples of each microprocessor s clock frequency, on the telephone line. The test lab replaced the modem s unfiltered jack with a Corcom -4L-B filtered modular jack out of their sample kit, and the board/computer combinations passed with 4 db margin worst case. An RISC workstation designed to operate in a twisted-pair Local Area Network required two DIP package inductors and 12 chip capacitors to meet FCC radiated emissions limits. All 14 discrete components were eliminated by replacing the two connectors with two Corcom -8LC1-B shielded and filtered jacks, and the margin of compliance actually improved. A secure telephone set failed hardened application testing at a government facility, due to intelligible emanations radiated from the coiled handset cord. The unit passed after the handset connector in the desk set was replaced by a Corcom RJH-4L-B filtered handset jack. A medical manufacturer was designing a heart monitor which would transfer data over a signal line to the nurses station so they could monitor patients. When the doctors used their modems, the data coming from the monitor became distorted. This occurred due to the close proximity of the modem card and monitor communication card placed next to each other. A Corcom low profile -8N3-B modular jack was designed in to filter out the unwanted noise. Signal Line Products 243
3 SignalSentry Part Number Matrix / Ordering Information WHAT TYPE OF CONNECTOR DO YOU NEED? Handset jack four pin connector six pin connector eight pin connector RJH HOW MANY TERMINALS WILL BE LOADED? 4 on RJH 2, 4 or on or 8 on 4 WHAT LEVEL OF FILTERING PERFORMANCE DO YOU NEED? No filter, standard profile X models Inductor (block or sleeve), standard profile L models Inductor plus capacitors with shield LC models Inductor, 82 pf cap. and shield LCT model Inductor (block or sleeve), low profile N models No filter, low profile Z models L DO YOU WANT A SHIELDED JACK? WHAT TYPE OF GROUND? 1Panel and board ground (spring fingers on panel interface) 1 1Board ground pins only 2 2Panel, board and cable ground (low profile versions) 3 2Board ground and cable ground (low profile versions) 4 1 WHAT TYPE OF INDUCTORS DO YOU NEED? Sleeve Average performance Block Higher performance S B B Model Contact Loading Program Model Contact Loading Program Jack Designation Lead Frame Position Jack Designation Lead Frame Position
4 SignalSentry Selector Chart Yes Filtered No Try The Inductor and Capacitor Level of Filtering Inductor Only X Standard Profile Page 252 Z Low Profile Page 253 Try The LC 820pF Page 249 LCT 82pF Page 250 Yes Try The L (Ganged) Standard Profile Page 248 Ganged Jacks No Try The L Standard Profile Page 247 N Low Profile Page 251 Signal Line Products 245
5 Engineering Notes 24
6 Inductive Filtering Modular RJ Jacks L with Block Filter with Sleeve Filter L Inductive filtering in standard,, or handset jacks. Available with standard ferrite sleeve inductors or higher performance ferrite blocks Available unshielded or shielded with board grounded shield or spring fingered panel ground interface Inductor Filter RJH-4L-B -L-S -2L-S -L-B -2L-B -8L-S -4L-S -8L-B -4L-B -L-S -L-B Inductor Filter and Shield -2L2-B -L1-S -4L1-S -L1-B -4L1-B -L2-S -4L2-S -L2-B -4L2-B -8L1-S -L1-S -8L1-B -L1-B -8L2-S -L2-S -8L2-B -L2-B Shield 2 Shield 1 Ferrites: Type: High resistivity, nickel zinc ceramic Sleeves: Single-aperture cylinders Block: Multi-aperture rectangular prism Shield Tin-plated copper alloy Housing Glass-filled polyester (UL94V-0) Line to Line and Line to Ground: 1000 VAC for 0 seconds Typical Impedance in Ohms Impedance in Ohms Frequency in MHz Ferrite block Ferrite sleeve Model dimensions and PC board layout on pages Signal Line Products 247
7 L Ganged Inductive Filtering Ganged Modular RJ Jacks 4 2 with Block Filter L Ganged Ganged version of our L filtered jacks Available in models with block inductors Available in gangs of 2, 4 or Retrofits existing unfiltered ganged jack footprints Dimensions and PC Board Layout [1.27] A B C Dia. Ferrites: Type: High resistivity, nickel zinc ceramic Block: Multi-aperture rectangular prism Housing Glass-filled polyester (UL94V-0) Line to Line and Line to Ground: 1000 VAC for 0 seconds [8.89] [.35] D Dia. 2-L-B -L-B 4-L-B Ports A B C D 2 4 Typical Impedance in Ohms Impedance in Ohms Frequency in MHz 248
8 Filtered s with Enhanced Performance LC Shield 2 Shield 1 Shield 2 Shield 1 LC Chip capacitors provide enhanced filtering performance on each line Available with block or sleeve inductance Available with board grounded shield or spring fingered panel ground interface Performance Data Typical Insertion Loss Model dimensions and PC board layout on pages Capacitors: Type: Monolithic ceramic chip Standard Value: 820 pf Standard Tolerance: ± 20% Ferrites: Type: High resistivity, nickel zinc ceramic Sleeves: Single-aperture cylinders Block: Multi-aperture rectangular prism Shield Tin-plated copper alloy Housing Glass-filled polyester (UL94V-0) Line to Line and Line to Ground: -2LC1-S -2LC1-B -2LC2-S -2LC2-B -4LC1-S -4LC1-B -4LC2-S -4LC2-B -LC1-S -LC1-B 1000 VAC for 0 seconds -LC2-S -LC2-B -LC1-S -LC1-B -LC2-S -LC2-B -8LC1-S -8LC1-B -8LC2-S -8LC2-B Signal Line Products 249
9 Low Capacitance Modular RJ Jacks LCT Shield 2 Shield 1 Shield 2 Shield 1 LCT Low capacitance model for improved performance. Particularly suited for ethernet applications Available with block or sleeve inductance Available with board grounded shield or spring fingered panel ground interface Performance Data Typical Insertion Loss Model dimensions and PC board layout on pages Capacitors: Type: Monolithic ceramic chip Standard Value: 82 pf Standard Tolerance: ± 20% Ferrites: Type: High resistivity, nickel zinc ceramic Sleeves: Single-aperture cylinders Block: Multi-aperture rectangular prism Shield Tin-plated copper alloy Housing Glass-filled polyester (UL94V-0) Line to Line and Line to Ground: -LCT1-S -LCT1-B -LCT2-S -LCT2-B 1000 VAC for 0 seconds -8LCT1-S -8LCT1-B -8LCT2-S -8LCT2-B 250
10 Low Profile Filtered s N Shield 3 Shield 4 N Low profile SignalSentry filtered jack Available with sleeve or block inductors Available unshielded or shielded with board grounded shield or spring fingered panel ground interface Typical Impedance in Ohms Impedance in Ohms Frequency in MHz Ferrite block Ferrite sleeve Ferrites: Type: Sleeves: Block: Shield Housing Line to Line and Line to Ground: -N-B -N3-B -N4-B High resistivity, nickel zinc ceramic Single-aperture cylinders Multi-aperture rectangular prism Tin-plated copper alloy Black glass-filled polyamide (STANYL TE250F3) 1000 VAC for 0 seconds -8N-B -8N-S -8N3-B -8N3-S -8N4-B -8N4-S Unshielded Ferrite Block Model dimensions and PC board layout on pages Signal Line Products 251
11 Unfiltered s X X Unfiltered standard jack or 2, 4, or 8 loaded contacts Available unshielded or shielded with board grounded shield or spring fingered panel ground interface Shield Tin-plated copper alloy Housing Glass-filled polyester (UL94V-0) Line to Line and Line to Ground: 1000 VAC for 0 seconds Shield 1 Shield 2-2X -4X -X -X -8X -8X1-8X2 Model dimensions and PC board layout on pages
12 Low Profile Unfiltered s Z Shield 3 Shield 4 Z Low profile Unfiltered Available unshielded or shielded with board grounded shield or spring fingered panel ground interface -Z -Z3 -Z4-8Z -8Z3-8Z4 Shield Housing Line to Line and Line to Ground: Tin-plated copper alloy Black glass-filled polyester (VALOX 457) 1000 VAC for 0 seconds Model dimensions and PC board layout on pages Signal Line Products 253
Distributed by: www.jameco.com 1-800-831-4242 The content and copyrights of the attached material are the property of its owner. FEATURES AND SPECIFICATIONS Features and enefits Exceeds Category 5 performance
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