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MTL<strong>8000</strong>-2/x Series - OverviewMixed I/O types within asingle nodeIS and non-IS field wiring types can also beincorporated within one MTL<strong>8000</strong> node(see Figure 5). In this arrangement, the twoparts of the node are separated by a‘Railbus Isolator’ module. The RailbusIsolator provides a section of internalcommunications bus (‘Railbus’) for the ISI/O modules which is protected frominvasion by damaging fault voltagesUniquely, a single MTL<strong>8000</strong> node (underthe command of one Bus Interface Module)can then support a mixture of certified ISfield devices, certified Division 2 or Zone 2field devices and general purpose I/O,including AC mains circuits. Only oneRailbus Isolator is used per MTL<strong>8000</strong> node.Node services carrier(Safe area or Zone 2/Div 2 fieldwiring)Local18–36VdcBussed Field Powerr(Safe area or Zone 2/Div 2 fieldwiring)Railbus Isolatormodule andcarrierRelated MTL<strong>8000</strong> LiteratureAN<strong>8000</strong>System Specifier’s Guide - Modular I/OINM<strong>8000</strong>Installation Guide4-module carrier(IS field wiring)[EEx ia]I/O modulepower8-module carrier(IS field wiring)[EEx ia]Figure 5 MTL<strong>8000</strong> node with mixed IS and non IS field wiringOptional n+1redundantI/Omodule powersupplyMTL Power Court, Luton, Bedfordshire, England LU1 3JJTel: +44 (0)1582 723633 Fax +44 (0)1582 422283E-mail: enquiry@mtl-inst.com Web site: http://www.process-io.comSept 2002
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