Magnetic Shield Model 51001R Reduces susceptibility of FTT-10A to strong magnetic elds Two-piece design includes inner Co-Netic and outer Netic shields as far away from the FTT-10A transceiver as possible and any unavoidable stray magnetic elds should be oriented vertically with respect to the transceiver. The best solution to stray magnetic eld problems is to quiet the source of the noise, e.g., by shielding switching power supply inductors. A magnetic shield may be necessary in environments where high ambient magnetic elds cannot be avoided. This Description is especially true when the base frequency of the interfering The Model 51001 Magnetic Shield is a two-piece source is near, or within, the range of 10kHz to 300kHz, since shield that minimizes the effects of magnetic eld noise on this range is used for communication signaling by the FT-T the FTT-10A transceiver. For environments where such noise 10A. Although it is usually more e ective to shield the source cannot be shielded at its source, the Model 51001R shield can of the noise, in some cases it may not be possible, su cient, improve FTT-10A operation when magnetic eld noise or cost effective to shield the noise source. In such cases, the becomes problematic. Model 51001R Magnetic Shield can be used to decrease the Model 51001R is compliant with the European Directive susceptibility of the FTT-10A to stray magnetic elds. 2002/95/EC on the restriction of the use of certain hazardous substances (RoHS) in electrical and electronic equipment. Application and Installation The inner shield is mounted directly over the FTT-10A, Stray Magnetic Fields which is itself usually mounted on a PCB. A small amount of All transformer-based transceivers, like the FTT-10A, non-critical adhesive, such as RTV, may be used on the interior are vulnerable to su ciently large stray magnetic elds. surface of the shield to fasten the shield securely to the FTT- In most environments, stray magnetic eld noise is not a 10A plastic shell. The outer shield is then mounted in a similar concern for the FTT-10A transceiver. However, there are way over the outside of the inner shield, forming a nested environments where large magnetic elds can couple onto structure. the FTT-10A and interfere with communications. The Both materials used in the shields are electrically conduc- FTT -10A transceiver is least sensitive to stray vertical tive and therefore the shields should not be in contact with the magnetic elds, and most sensitive to stray horizontal PCB. A clearance of 0.020 to 0.040 inches (0.5 to 1.0mm) magnetic elds (i.e., elds which are parallel to the printed should be provided between the bottom of the shield and the circuit board PCB on which the transceiver is mounted). PCB so that an electrostatic dischager path is not created Very strong magnetic elds in the horizontal plane of between the shield and the PCB. the FTT-10A can interfere with network communications. Sources of stray magnetic eld noise should therefore be keptSpecications F unction Descr iption Magnetic shield Provides additional protection from stray magnetic elds Material Inner shield Stress Annealed Co-Netic Alloy, unpainted Outer shield Stress Annealed Netic Alloy, painted glossy black Internal Dimensions Inner shield 18.3mm x 13.8mm x 6.1mm (0.720 x 0.542 x 0.240) Outer shield 20.1mm x 15.8mm x 7.1mm (0.790 x 0.623 x 0.280) Ordering Information Product E chelon M odel Number Magnetic Shield 51001R Copyright 2001-2006, Echelon Corporation. Echelon Corporation. Echelon, LON, L ONWORKS , LONMARK , LonBuilder, NodeBuilder, LonManager, LonTalk, LonUsers, LonPoint, Digital Home, Neuron, 3120, 3150, LNS, i.LON, L ONWORLD , ShortStack, Panoramix, LonMaker, the Echelon logo, and the LonUsers logo are trademarks of Echelon Corporation registered in the United States and other countries. LonLink, LonResponse, LonSupport, LONews, Open Systems Alliance, OpenLDV, Powered by Echelon, LNS Powered by Echelon, Panoramix Powered by Echelon, L ONWORKS Powered by Echelon, Networked Energy Services Powered by Echelon, NES Powered by Echelon, Digital Home Powered by Echelon, Pyxos, and Thinking Inside the Box are trademarks of Echelon Corporation. Other trademarks belong to their respective holders. Disclaimer Neuron Chips, Free Topology Twisted Pair Transceiver Modules, and other OEM Products were not designed for use in equipment or systems which involve danger to human health or safety or a risk of property damage and Echelon assumes no responsibility or liability f or use of the Neuron Chips or F ree Topology Twisted P air Transceiver Modules in such applications. ECHELON MAKES AND YOU RECEIVE NO WARRANTIES OR CONDITIONS , EXPRESS , IMPLIED , STATUTORY OR IN ANY COMMUNICATION WITH YOU, AND ECHELON SPECIFICALLY DISCLAIMS ANY IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. 003-0325-01B ww w . e che lo n . co m