GE DS200PCCAG8A Output expansion module

This chapter looks at design issues. There is a discussion of Electromagnetic Interference (EMI), and Electrostatic Discharge (ESD), and Designing for Interoperability.

Echelon has designed the Twisted Pair Control Modules with low enough RF noise levels for design into level “B” products. Echelon encourages level “B” compliance for all LONWORKScompatible products. This section describes design considerations for control module-based products to meet EMI regulations.

EMI Design Issues

 The high-speed digital signals associated with microcontroller designs can generate unintentional Electromagnetic Interference (EMI). High-speed voltage changes generate RF currents that can cause radiation from a product if a length of wire or piece of metal can serve as an antenna. Products that use the Twisted Pair Control Modules will generally need to demonstrate compliance with EMI limits enforced by various regulatory agencies. In the USA, the FCC5 requires that unintentional radiators comply with Part 15 level “A” for industrial products, and level “B” for products that can be used in residential environments. Similar regulations are imposed in most countries throughout the world6,7.

Designing Systems for EMC 

(Electromagnetic Compatibility) Echelon has demonstrated that designs using the control modules can meet both FCC and EN55022 level “B” limits. Careful design of application electronics is important to guarantee that a control module-based node will achieve the desired EMC. Information on designing products for EMC is available in several forms including books,8 seminars, and consulting services. This section provides useful design tips for EMC. The TP/FT-10 and TP/FT-10F Control Modules have been designed to comply with IEC 801-2, 3, 4 and 5 standards. For more information, see the FTT-10 Free Topology Transceiver User's Guide or FTT-10A Free Topology Transceiver User's Guide, as applicable.

 Company product range

----------------------Ruichang Mingsheng Automation Equipment Co., Ltd----------------------

PLC module, programmable controller, CPU module, IO module, DO module, AI module, DI module

Network communication module,

Ethernet module, motion control module, analog input module, analog output module, digital input module, digital output

Module, redundancy module, power module, relay output module, relay input module, processor module