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1 Artisan Technology Group is your source for quality new and certified-used/pre-owned equipment FAST SHPPNG AND DELVERY TENS OF THOUSANDS OF N-STOCK TEMS EQUPMENT DEMOS HUNDREDS OF MANUFACTURERS SUPPORTED LEASNG/MONTHLY RENTALS TAR CERTFED SECURE ASSET SOLUTONS SERVCE CENTER REPARS Experienced engineers and technicians on staff at our full-service, in-house repair center SM nstraview REMOTE NSPECTON Remotely inspect equipment before purchasing with our interactive website at Contact us: () -SOURCE WE BUY USED EQUPMENT Sell your excess, underutilized, and idle used equipment We also offer credit for buy-backs and trade-ins LOOKNG FOR MORE NFORMATON? Visit us on the web at for more information on price quotations, drivers, technical specifications, manuals, and documentation

2 MTL000 Series isolating interface units nstruction Manual NM000

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4 CONTENTS Page NTRODUCTON DESCRPTON NSTALLATON nstalling unenclosed isolators ACCESSORES MTL000 power bus - nstallation and use Earth rail and tagging accessories DX ENCLOSURES Environmental conditions Mounting Accessories in enclosures S warning label UNT DESCRPTONS, SETTNG-UP, CONNECTONS AND TESTNG MTL0 single-pole relay single-channel switch/proximity detector with phase reversal (Discontinued use MTL0B) MTL0B single-pole changeover relay single-channel switch/proximity detector with line fault detection and phase reversal MTL0 solid-state single-channel switch/proximity detector with line fault detection and phase reversal MTL0 single-pole changeover relay single-channel dual-output switch/proximity detector with line fault detection and phase reversal..... MTL0 solid-state two-channel switch/proximity detector with line fault detection and phase reversal MTL0 single-pole relay two-channel switch/proximity detector with phase reversal (Discontinued, use MTL0) MTL0 single-pole relay two-channel switch/proximity detector with line fault detection and phase reversal MTL0 single-pole, changeover relay, two-channel, switch/proximity detector with line fault detection and phase reversal MTL0AC single-pole, changeover relay, two-channel, switch/proximity detector with line fault detection and phase reversal MTL0 loop-powered solenoid/alarm driver, C MTL0 loop-powered solenoid/alarm driver, B MTL0 solenoid/alarm driver with line fault detection and phase reversal MTL0 solenoid/alarm driver, logic drive with phase reversal MTL0 low-current loop-powered solenoid/alarm driver, C MTL0 vibration transducer interface MTL0 pulse isolator MTL00 -channel to 0mA loop isolator MTL0/ repeater power supplies MTL0 repeater power supply dual output, to 0mA for -wire transmitters MTL0 repeater power supply MTL0/ isolating drivers MTL0 analogue input/output, loop-powered isolator MTL0 two-channel isolating driver MTL0 serial data comms isolator MTL0 isolator/power supply for.kbit/s fieldbuses MTL0 two-channel loop-powered fire/smoke detector interface MTL0 temperature converters, THC or RTD input MTL0 millivolt isolator MTL0 resistance isolator MTL0 dummy isolator MTLP fail-safe switch/proximity detector interface MTL trip amplifier for or wire transmitters MTL Repeater power supply MTL two-channel isolating driver MTL V dc power supply MTL fieldbus power supply for.kbit/s fieldbuses FBT-S fieldbus terminator MTL nstruments Group plc. All rights reserved. iii

5 MANTENANCE Routine maintenance Enclosures OTHER USEFUL DOCUMENTATON APPENDX A - NSTRUCTONS FOR MTL00 SERES MTL rotational speed monitor MTL voltage/current converter MTL potentiometer converter iv

6 MTL000 Series nterface units NM000- July 00 Figure.: MTL000 Series isolators WARNNG This manual describes the use and installation of safety equipment. This equipment must be installed, operated and maintained only by trained competent personnel and in accordance with all appropriate international, national and local standard codes of practice and site regulations for intrinsically safe apparatus and in accordance with the instructions contained here. ATEX f the country of installation is governed by the Essential Health and Safety Requirements (Annex ) of the EU Directive //EC [the ATEX Directive - safety of apparatus] then MTL document NA000 must be consulted before installation. CERTFCATON DATA The MTL web site contains documentation regarding intrinsic safety certification for many locations around the world. Consult this data for information relevant to your local certifying authority. REPAR These products MUST NOT be repaired. Faulty or damaged products must be replaced with an equivalent certified product. NTRODUCTON This instruction manual explains how to install, connect, test and maintain MTL000 Series isolating interface units (isolators). DESCRPTON MTL000 Series isolators provide intrinsically safe (S) communication and signal conditioning for a wide range of hazardous-area devices. Total ac and dc isolation exists between input, output and power supply on separately powered units, and between input and output on looppowered units. No S earth is required. DN-rail mounting and plug-in signal and power connectors simplify installation and maintenance. Units are powered from a 0 to V dc supply, or, in some cases, from the signal itself. NSTALLATON Mount all MTL000 Series isolators on low-profile (mm) or high-profile (mm) type T (top-hat) DN-rail to EN00, BS, DN. This is available from MTL, in metre lengths (THR DN rail). nstall isolators within the safe area unless they are enclosed in approved flameproof, pressurised or purged enclosures and ensure that the local environment is clean and free of dirt and dust. Note the ambient temperature considerations of section... t is recommended that, in normal practice, the DN rail is earthed to ensure personnel safety in the event of mains being put accidentally on the rail.. nstalling unenclosed isolators On new installations, if isolators are mounted in several rows orcolumns, mount alternate rows or columns so that units face in opposite directions. This allows safe- and hazardous-area wiring looms to be shared. See figure. for isolator dimensions. Note: All MTL products are tested for electrical safety to EN 00 to comply with the EC Low Voltage Directive

7 Hazardous-area connections Non-hazardous (safe) area connections Consult table below for additional details. 0. pitch mm Power Plugs Grey: dc supplies (PWR000) mm 0 Signal Plugs Grey: safe-area side Blue: hazardous-area side Power connectors Figure.: Dimensions of MTL000 Series isolators Figure.: Removable power and signal plugs coloured grey, for safe-area connections, and blue, for hazardous-area connections. For externally powered units, a power plug slots into the socket at terminals and on the safe-area side of each module. The socket is coloured blue if the unit is dc powered. Power plugs are coloured grey, for plugging into the blue sockets of dc powered units. Making connections a) Trim back the insulation of conductors by mm. b) Check the terminal assignments shown in section or on the side label of the unit. c) nsert conductors according to the terminal assignments and tighten screws. f the wires are to be fitted with crimp ferrules, the following is a list of those recommended with required trim lengths for each: *- to -week lead time Plug Entry Wire Metal tube Trim Recommended ferrules type size length length (mm) (mm) (mm) Figure.: DN rail mounting and removing isolators.. Mounting isolators on DN rail Clip isolators onto type T DN rail as shown in figure., with the blue signal plugs facing towards the hazardous-area wiring.to remove an isolator from the rail, insert a screwdriver blade into the clip as shown and lever the clip gently outwards; pivot the isolator off the rail. Allow a maximum mounting pitch of.mm for each unit... Wiring up isolators Each unit is supplied with the appropriate number and type of safe- and hazardous-area connectors (see figure.), as dicatated by the terminals used and the type of power supply. Loop-powered devices do not require power connectors. Depending on the installation, it may be easier to wire up isolators with power and signal plugs either in place or removed. Either way, allow sufficient free cable to permit plugs to be removed easily for future maintenance and/or replacement purposes. See section for individual unit wiring instructions. Note: Units for use with.kbit/s fieldbuses may require additional terminators to be fitted. See section. for details of MTL's FBT fieldbus terminator. Signal and power conductors Removable signal and power plugs are fitted with screw clamp terminals. Note that the conductors should be between and AWG (. and 0.mm dia) in size. Signal plugs, located on top of the modules, are mechanically keyed to fit in only one position. They are Signal Twin x. Cembre PKET Signal Single 0. Weidmuller 0 Signal Single.0 Cembre PKC Signal Single.0 Phoenix Contact A - RD (00)* Signal Single. Cembre PKE Signal Single. Cembre PKE Power Twin x0. 0 Cembre PKET0 Power Twin x0. 0 AMP (non-preferred) - Power Twin x.0 0 Phoenix Contact A-TWN X -0 RD Power Single 0. 0 AMP 0-0 Power Single.0 0 Phoenix Contact A -0 RD These ferrules have mm length metal tubes which should be cut to mm after crimping Note: Smaller section wire than that stated can often be successfully used if the crimping is good. Crimp tool: Phoenix Contact Crimpfox UD part number 0 Finishing Wire up individual isolators in accordance with wiring schedules. Daisychain power supply connections between individual power plugs or use the power bus (see section.). Segregate hazardous- and safe-area wiring into separate trunking or looms wherever possible to avoid errors and maintain a tidy installation. Use an MTL0 dummy isolator to provide termination and earthing for unused cores from the hazardous area.

8 .. Phase reversal Switch(es) to change the phase of the output(s) relative to the input(s) are provided on the top labels of some of the MTL000 Series modules and on the base of others. The following applies: MTL0B, 0 and 0: Phase reversal switch on top label PR switch setting Hazardous-area input(s) Output relay(s) Off <.ma De-energised Off >.ma Energised On <.ma Energised On >.ma De-energised MTL0: Phase reversal switch on base of module PR switch setting Hazardous-area input(s) Output relay(s) o (off) <.ma De-energised o (off) >.ma Energised (on) <.ma Energised (on) >.ma De-energised MTL0 and 0: Phase reversal switch on top label PR switch setting Hazardous-area input(s) Solid-state output(s) Off <.ma Non-conducting Off >.ma Conducting On <.ma Conducting On >.ma Non-conducting MTL0 and 0: Phase reversal switch on base of module Hazardous-area PR switch setting Safe-area control output o (off) CTRLVe >.V above CTRL-Ve Enabled o (off) CTRLVe <.V above CTRL-Ve Disabled (on) CTRLVe >.V above CTRL-Ve Disabled (on) CTRLVe <.V above CTRL-Ve Enabled Positions for base-located switches are set as shown in figure.. Note: the open circuit window (between 0µA and 0µA) is not hysteresis, all MTL000 Series modules with inputs conforming to NAMUR/DN will switch between open and complete circuit conditions within these limits. Note: the short circuit window (between 00Ω and 0Ω) is not hysteresis, all MTL000 Series modules with inputs conforming to NAMUR/DN will switch between open and complete circuit conditions within these limits. Modules with LFD and inputs conforming to NAMUR/DN : MTL0B, 0* and 0: LFD enable switch on top label LFD switch setting Hazardous-area input(s) Output relay(s) On <0µA De-energised On >0µA Energised On >0Ω Energised On <00Ω De-energised * The MTL0 has a Slave/LFD output relay arrangement (see module description in section ). MTL0 and 0: LFD enable switch on top label LFD switch setting Hazardous-area input(s) Solid-state output(s) On <0µA Non-conducting On >0µA Conducting On >0Ω Conducting On <00Ω Non-conducting MTL0: LFD permanently enabled Hazardous-area input (either channel) Line-fault-detect relay <0µA De-energised >0µA Energised >0Ω Energised <00Ω De-energised Other modules with LFD facility MTL0 solenoid/alarm driver: LFD automatic Normal CH A Reverse Hazardous-area load Solid-state LFD output <0Ω Non-conducting >kω Non-conducting Base of unit CH B MTL0 isolating driver: LFD automatic Label face Figure.: Phase reversal switch on base of units.. Line fault detection (LFD) Line fault detection on hazardous-area sensor lines (open circuit or short circuit) is provided on some MTL000 Series modules. Note: resistors must be fitted when using the LFD facility with a contact input: 00Ω to kω in series with switch and 0kΩ to kω in parallel with switch. For hazardous-area inputs conforming to NAMUR/DN, a line fault condition is indicated as follows: Open circuit condition if hazardous-area current <0µA Line integrity (no open circuit) if hazardous-area current >0µA Short circuit condition if hazardous-area load <00Ω Line integrity (no short circuit) if hazardous-area load >0Ω Hazardous-area load Safe-area input <0Ω High impedance (>0kΩ) >0Ω Normal operation Note: The safe-area circuit impedance will increase with hazardousarea load and will rise >0kΩ for the 'open circuit' line fault. MTLx: LFD automatic Hazardous-area input LFD output < 0µA (open-circuit) de-energised >.ma (short-circuit) de-energised

9 ... Relay outputs Reactive loads on all units with relays should be adequately suppressed.changeover relay outputs are provided on the following units: MTL0B, MTL0, MTL0 and MTL. n order to achieve maximum contact life, a minimum switching current of 0mA at V is recommended. x.. Earth leakage detection An MTL0 earth leakage detector can be used with a number of MTL000 Series units to detect hazardous-area earth faults which can then be rectified without needing to shut down the loop ('no-fail' operation). On units with a single-channel input, the MTL0 is connected to terminal and on units with two-channel inputs, to terminals and. Units which can be used with an MTL0 are: Optional insulation displacement connectors MTL0B MTL0 MTL0 MTL0 MTL0 MTL0 MTL0 MTL0 MTL0 MTL0 MTL0 MTL0 N.B. HAZ- or HAZ- connectors are required... Ambient temperature considerations Ambient temperature limits for unenclosed MTL000 Series isolators are from -0 C to 0 C with units close-packed. ACCESSORES. MTL000 power bus - nstallation and use.. MTL000 Series power bus Power bus kits provide facilities for linking the power supply terminals ( and ) of up to installed MTL000 Series units to a standard V power supply. Buses consist of chains of power plugs and are available in different lengths to suit various numbers of modules as follows: Number of modules Kit D code (contains grey power plugs for V dc supply) to PB-T to PB-T to PB-T to PB-T... nstallation... Check to make sure the bus length is correct for the number of modules involved.... f the number of modules is less than the maximum number the chain will support, cut off the surplus power plugs at the tail end of the chain - leaving a 'new' tail end.... nsert power plugs into the power terminals on the safearea side of each module in sequence.... Connect the power supply source to the tail end of the chain (using the insulation displacement connectors (Scotchloks) provided if required). Notes:. To reduce the risk of excessive voltage drop or overcurrent, DO NOT connect power buses in series.. Surplus sections can be used (and, if required) connected together provided the cut ends are safely terminated and/or connected together. Use single ferrules with a crimp tool or insulation displacement connectors (Scotchloks). Suitable ferrules and connectors are provided with the kits.. Earth rail and tagging accessories This section explains how to specify and assemble earth rail and tagging strip accessories for the MTL000 Series. The accessories consist of mounting brackets, earth rails, tagging strips and associated parts. They provide facilities for earthing, terminating cable screens and tagging (identifying) the positions of individual units. Figure.: nstalling a chain of power plugs into MTL000 Series modules Figure.: Using crimp ferrules or insulation displacement connectors (Scotchloks) to terminate cut ends.. Parts list MB nsulating mounting block (figure.) One required at each end of a tagging strip/earth rail. Suitable for lowprofile (.mm) and high-profile (mm) symmetrical DN rail. ERBS Earth-rail bracket, straight (figure.) Nickel-plated; supplied with two push fasteners, one earth-rail clamp (mm, mm ) and one earth cable clamp (0mm, mm ). Note: ERBS is the preferred choice of earth-rail bracket. t is usually fitted in the upper slot on insulating mounting block MB. OR

10 Where the earth rail is required to be positioned at a lower height and to allow access to the MB mounting screws, the straight earth-rail bracket ERBS can be inserted in the lower slot, but only after insulating mounting blocks MB are clamped to the DN rail. This may not be possible if, for example, trunking is fitted. n this case, fit offset earth-rail bracket ERBO (see figure.) in the upper slot: the mounting blocks can then be fitted in a restricted space with this bracket already fitted. ERBO Earth-rail bracket, offset (figure.) Nickel-plated; supplied with two push fasteners, one earth-rail clamp (mm, mm) and one earth cable clamp (0mm, mm). ERL Earth rail, m length (figure.) Nickel-plated; may be cut to length. TAG Tagging strip, m length (figure.) Cut to size. Supplied with tagging strip label. TGL Tagging strip labels, set of 0 x 0.m Spares replacement, for use with TAG tagging strip. MS00 DN rail module spacer, 0mm, pack of (figure.0) Grey spacer, one required between each MTL and any adjacent module on a DN rail, to provide 0mm air-circulation space between modules. mm mm mm mm mm Figure.: MB nsulating mounting block mm 0mm 0mm mm mm mm mm TGL ERB ETM ERB0 TAG mm Earth-rail clamp ERL Push fastener Snap off extension when using MB as central support 0mm Earth clamp ERBS in upper position 0mm 0mm mm mm Figure.: ERBS Earth-rail bracket, straight (end-on view), and clamps mm 0mm ERBS in lower position.mm MB mm mm mm mm Figure.: Assembly drawing showing part numbers 0mm mm 0mm mm THR Type A Type B Figure.: ERBO Earth-rail bracket, offset (end-on view), and clamps MB PWR000 ERBS mm 0mm Figure.: ERL Earth-rail, m length mm ERL SAF- SAF0- Figure.: TAG Tagging strip,m length ETM HAZ- HAZ- TH000 TGL x TAG Figure.: Mounting details Figure.0: MS00 DN rail module spacers

11 Type A ETM Earth terminal, bag of 0 (figure.) For terminating cable screens and 0V returns on the ERL earth rail. For cables mm. TH000 Tag holder Spares replacement. Connectors Spares replacement: HAZ-, HAZ-, HAZ-CJC, PWR000, SAF-, SAF0- (SAF- and SAF- grey connectors, also available for use in safe-area applications)... Assembly. mm Figure.: ETM Earth terminal Type B mm... Fitting earth rails a) n upper position Before fitting insulating mounting blocks MB, check that the swing nuts in the base of each unit are turned back into the moulding. Locate the mounting blocks on the DN rail in the chosen position and tighten the screws (see figure.). Check that the swing nuts rotate correctly to locate underneath the flanges of the DN rail. b) n lower position, where at least 0mm clearance exists on one side, measured from the edge of the mounting block. As for a), but slide earth-rail brackets ERBS into the lower slots in each mounting block. c) n lower position, where there is insufficient clearance to fit earth-rail brackets ERBS. As for a), but slide offset earth-rail brackets ERBO into the upper slot in each mounting block before assembling the mounting blocks to the DN rail. ERBS brackets cannot be used because they obscure the mounting blocks' fixing screws.... Fitting tagging strips Assemble mounting blocks MB to the DN rail as above. Cut TAG tagging strip and label to the length needed, and insert label so that the appropriate side is visible. Clip the strip onto the lugs on the mounting blocks. Hinge up the strip to provide access to the tops of the isolators. Note: f necessary, provide additional support for long lengths of tagging strip by installing an extra MB mounting block mid-way between the end mounting blocks. Snap out the perforated extension between the lugs on this mounting block... Completed assemblies Figure.(below) illustrates a complete assembly of MTL000 isolators using the accessories mentioned above. The broken-line boxes either side of the assembly represent cable trunking, and the accompanying dimensions represent the minimum spacing between trunking and assemblies. For further information on the use of the accessories please refer to the relevant MTL customer drawings listed in section. Figure.: Fitting MB Slide a straight earth-rail bracket ERBS into the upper slot in each mounting block. Push two plastic push fasteners into each bracket to locate the brackets in the mounting blocks. Cut earth rail ERL to the length needed. Slide the required number of ETM earth terminals (mm or mm wide) onto the rail. Clamp each end of the earth rail to earth-rail brackets ERBS using the terminal clamps (mm, mm ) supplied. Fit an earth clamp (0mm, mm ) to the free end of each earth-rail bracket. Note: For lengths of earth-rail greater than 00mm, provide additional support by installing a third MB mounting block and earth-rail bracket, mid-way between the end mounting blocks. Snap out the perforated extension between the lugs on this mounting block if a continuous tagging strip is to be fitted (see figure.). 0mm 0mm Figure.: MTL000 Series - complete assembly

12 DX ENCLOSURES (inside) DX DX0 DX0 Top of DN rail (inside) Top of DN rail (inside) Figure.: MTL s DX range of enclosures Enclosures are usually selected on the basis of the number of units they will accommodate and table. shows the capacity of each of the enclosures. Figures. to. show each type of enclosure containing MTL000 modules. Enclosure MTL000 isolators. mm mounting pitch DX00 (*) DX0 0 (*) DX0 (*) Table.: DX range of enclosures - module capacities * Use these figures when two MB mounting brackets for tagging/earth-rail accessories are included Note: The user should be aware that some workshop preparation may be required for the cable gland plates before the enclosure is ready for on-site installation. MTL000 Series solators Figure.: DX00 enclosure showing MTL000 modules mounted

13 MTL000 Series solators The graph was derived from the following equation and should be used to calculate accurately the suitability of any particular mix of modules. T MO = 0 C - δt where δt = k x P P = total power (watts) dissipated by modules in an enclosure k = is a dissipation constant for a given enclosure and module series. Select the relevant value from table.. (0 C is the temperature inside the enclosure) Table.: Dissipation constant k for enclosures ( C/watt) Figure.: DX0 enclosure showing MTL000 modules mounted DX00 DX0 DX0 MTL MTL000 Series solators Max. outside enclosure temperature ( C) Enclosures DX00 DX0 DX Power dissipation (watts) Figure.: Graph depicting outside enclosure temperature limits for DX enclosures used with MTL000 Series isolators Figure.: DX0 enclosure showing MTL000 modules mounted. Environmental conditions Environmental conditions that should be taken into account when installing DX enclosures include:- See section Maximum ambient temperature limits.. Storage temperatures.. Humidity.. Corrosion resistance.. Flammability.. mpact resistance.. Chemical resistance.... Maximum outside enclosure temperature limits The maximum outside enclosure temperature depends upon the total power dissipated by the installed modules which, in turn, depends upon their number and type. t can also be influenced by the Authority whose standards may need to be applied to the system, e.g. BASEEFA (CENELEC), Factory Mutual Research Corporation, Canadian Standards Association. Figure. shows, in graphical form, the maximum outside enclosure temperatures (T MO ) for given levels of power dissipation. Figure.: Optimum orientation for wall-mounted enclosure Orientation of the enclosures is also important - the optimum position being on a vertical surface with the internal DN-rail horizontal as shown in figure.. Any other position can reduce the maximum allowable ambient temperature by up to C. Examples Tables. and. list likely combinations of MTL000 Series modules in the three enclosure types and indicate the acceptable maximum permitted outside enclosure temperature for these based on the graph in figure.. See the specifications included in the latest version of MTL's S catalogue for the power dissipation figures of individual MTL000 Series modules... Storage temperatures Storage temperatures are safe within the range -0 C to 0 C... Humidity limits Safe humidity limits are within the range to % RH.

14 Table.: Typical mix of MTL000 Series modules Power dissipation Maximum outside Enclosure Modules installed of modules in watts (P) enclosure temp. (T MO ) C DX00 xmtl0b xmtl0 (x0.) (x.) =.. DX0 xmtl0b xmtl0 (x0.) (x.) =.. DX0 xmtl0b xmtl0 (x0.) (x.) =..0 Table.: Power versus maximum outside enclosure temperature Number of k Power dissipation Maximum outside Enclosure installed modules C/watt of modules in watts (P) enclosure temp. (T MO ) C DX DX DX Corrosion resistance The effect of corrosion on DX enclosures is negligible... Flammability rating The flammable properties of the materials used in the construction of the enclosures are well understood by manufacturers and ratings have been established to a number of standards. One of the better known standards is the Underwriter's Laboratory standard UL and the ratings for the enclosure materials are given as: Materials UL rating Polycarbonate (all lids) V/V0 Polycarbonate with glass reinforcement (DX00 base) V/V0 Polyester with glass reinforcement (DX0 & DX0 bases) V0 tems made from similar materials are well established as suitable for use in process /O marshalling areas... mpact resistance The enclosure designs have been tested to an impact resistance of greater than Joules which exceeds the BS EN 00- requirements of 0. Joules... Chemical resistance The overall chemical resistance of the enclosures is limited by the resistance of the transparent polycarbonate lid. The glass-reinforced polycarbonate/polyester (GRP) bases have a higher resistance than plain polycarbonate. Table. lists qualitative evaluations of resistance to a variety of chemical agents.. Mounting.. General These instructions are concerned solely with mounting the DX enclosures. nstructions for wiring and testing individual modules within the enclosures are provided in Section. Sufficient space is provided within the enclosures to accommodate tagging and earth-rail accessories but this is at the expense of a reduction in the number of modules that can be fitted... Location and orientation... Location The DX enclosures are intended for safe (non-hazardous) area use. n N. America or Canada (because the enclosures are rated NEMA X) they can be used in Class, Division (gases) location, but check with local requirements and ensure all cable entries also conform. n this case, an additional warning label will be required on or near the enclosure warning that the MTL000 interfaces must not be removed unless the area is known to be non-hazardous. The enclosures are NOT suitable for Class or, Division hazardous locations.... Orientation As noted earlier (see section.. and figure.), for optimum temperature performance the enclosures should be mounted on a vertical surface with the internal DN rail horizontal... Mounting details See figures. to. for the dimensions and mounting hole distances, etc., of the three DX enclosures. The recommended method of mountingdescribed here-uses the four wall-mounting lugs supplied with each enclosure. An alternative method of mounting is by direct attachment to the mounting surface through the corner holes. Note: When the wall-mounting lugs are used to attach the enclosures, the overall depth of the enclosure is increased by an additional. mm (DX00) or mm (DX0 and DX0). a) At each of the four corner fixing holes, insert one of the screws provided and use it to attach a fixing lug to the base of the enclosure. b) Each lug can be used in one of two positions as shown in figures. to.. c) Attach the lugs to the mounting surface with suitable fasteners. d) Diameters of fixing holes in lugs are.mm (DX00) and.0mm (DX0 and DX0) e) Appropriate fixing hole distances are shown in figures. to.. Table.: Qualitative evaluations of resistance to various chemical agents Chemical agents Salt water; neutral salts; acids (low concentrations); hydraulic oil Alcohols Acids (high concentrations); alkalis (low concentrations); petrol; cooling fluids Alkalis (high concentrations); solvents. Qualitative evaluation of resistance Excellent Very good Good Poor

15 Ø.0 0 Ø. 0 0 Figure.: Dimensions and location of fixing holes - DX00 Figure.: Dimensions and location of fixing holes - DX0 0 Ø.0 Gland plate Typical gland positions Figure.: Dimensions and location of fixing holes - DX0 Figure.0: Cable gland plate locations on a DX0 enclosure.. Cable glanding All cables into the enclosures must be glanded to P standards to maintain this rating for the enclosure as a whole. Cable glands and gland plates are not supplied. Glanding requirements vary for each enclosure as follows: DX00 On the DX00, 'knockout' holes are provided, in two different sizes (. mm and mm), on the side faces of the base. See table. for recommended cable glands. Note: The enclosure may have three or four knockout holes on each side depending on the manufacturer. Consequently, there may be a choice of either six or eight positions for cable glands. Gland plate Typical gland positions Figure.: Cable gland plate locations on a DX0 enclosure DX0 The DX0 can accommodate one gland plate on each side - see figure.0 for details. Table. lists suppliers of suitable gland plate kits and Table. lists recommended glands. DX0 The DX0 can accommodate two gland plates on each side - see figure. for details. Table. lists suppliers of suitable gland plate kits and Table. lists recommended glands. 0

16 Table.: Recommended gland plate kits for DX0 and DX0 enclosures. Manufacturer/agent Enclosure DX0 Manufacturer s part number Enclosure DX0 Bowthorpe Hellermann TL-/0 TL-/0 Sarel Sarel (UK) Tel (0) Bowthorpe Hellermann (UK) Tel (0) Table.: Recommended cable glands for use with DX enclosures. Gland Cable Gland plate Weidmuller part nos. Sarel part nos. thread sizes hole size size (mm) (mm) Gland Locknut Gland Locknut PG to. 0 0 PG, to Weidmuller (UK) Tel (0) 0 Sarel (UK) Tel (0). Accessories in enclosures Apart from mounting, there are some other installation details which should be considered before adding the appropriate interface modules and making the necessary cabling connections. A range of accessories is available to accompany the MTL000 units (see section ). Further details of these accessories are provided in product sheet EPSACC and instruction manual NMACC but the following points should be observed... nsulating mounting block (MB) A pair of these can be attached to the DN rail, at either end of the modules, to provide a mounting for earth rails. Use of mounting blocks will reduce the space available for isolator modules... Earth rails (ERL) Earth rail is produced in metre lengths and will require cutting to length before mounting. ERL earth rails can be mounted either side of the modules but are typically mounted on the hazardous side of the DN rail... Tagging strip (TAG and TGL) Tagging strip is produced in metre lengths and will require cutting to length before mounting. Similarly, the labels will require cutting to fit the tagging strip.. S warning label A 'Take Care' S warning label is provided inside each enclosure. This should be attached to the inside of the transparent lid when its orientation has been established. UNT DESCRPTONS, SETTNG-UP, CONNECTONS AND TESTNG For each MTL000 Series unit, this section describes the function (briefly), the setting-up procedure, wiring connections and includes a simple functional test. For a fuller functional description and a detailed technical specification, refer to the appropriate entry in MTL's current S catalogue. The functional tests can be carried out during commissioning or later, for fault finding. f a fault is suspected, first check that the power LED is lit (not applicable to loop-powered devices). f necessary, check that all signal and power plugs are properly inserted, that no wires are loose and that the unit is mounted correctly. f operation is still suspect, carry out the tests. They establish whether power supplies are connected properly and whether the isolator is operating correctly. Please return units that fail these tests to the supplier. WARNNG When disconnecting units for testing, take care to segregate hazardous- and safe-area cables. Short circuit hazardous-area cable cores to an S earth or insulate and secure the ends. nsulate and secure safe-area cables. f testing 'in situ' note that the test equipment used MUST be intrinsically safe.. MTL0 single-pole relay singlechannel switch/proximity detector with phase reversal (Discontinued use MTL0B) The MTL0 enables a safe-area load to be relay-controlled by a switch or proximity detector located in a hazardous area. Output phase reversal (see..) is provided... Wiring connections See figure. for wiring connections. Note: Reactive loads must be adequately suppressed To earth leakage detector nput ve nput ve Earth leakage detection Output Output Supply ve Supply ve 0 Vs Vs 0 to V dc Figure.: MTL0 wiring diagram and connections

17 .. Testing Make the safe- and hazardous-area connections shown in figure. and check status LEDs and relay contacts as follows: nput Phase Status Relay switch reverse switch LED contacts Closed Normal On Closed Closed Reverse Off Open Open Normal Off Open Open Reverse On Closed 0W kw Resistors required only for line fault detection To earth leakage detector 0 Outpu Vs Vs 0 to V dc 0 Vs Vs 0 to V dc Figure.: MTL0B wiring diagram and connections nput ve nput ve Earth leakage detection 0 Normally-closed contact Common Normally-open contact Supply ve Supply ve Figure.: Test circuit for MTL0. MTL0B single-pole changeover relay single-channel switch/ proximity detector with line fault detection and phase reversal The MTL0B is similar to the MTL0 but with added line fault detection (LFD) facilities... Wiring connections See figure. for wiring connections. Note: Reactive loads must be adequately suppressed. 0W kw Ch To earth leakage detector c b a SW Figure.: Test circuit for MTL0B 0 Ch Vs Vs 0 to V dc.. Line fault detection (See section.. for definition of a line fault) nput line faults (open- or short-circuit) are indicated by an LED and the de-energising of the output relay. LFD is enabled/disabled by a switch located on top of the module. Note that if the LFD facility is enabled for switch inputs, the resistors shown in figures. and. MUST be fitted... Testing Make the safe- and hazardous-area connections shown in figure. and check the status of the output contacts as shown in table.. MTL0 solid-state single-channel switch/proximity detector with line fault detection and phase reversal The MTL0 enables a safe-area load to be controlled, through a solidstate output, by a switch or proximity detector in a hazardous area. Line fault detection (LFD) and output phase reversal (see..) facilities are included. Table. Phase nput Output Output Channel Line fault reverse Line fault switch relay relay LED LED switch detection (SW) (-) (0-) (yellow) (red) Normal Off a Closed Open On Off Reverse Off a Open Closed Off Off Reverse Off Open Closed Open On Off Normal On Open Open Closed Off On Normal On a Open Closed On On Normal On b Open Closed Off Off Normal On c Closed Open On Off

18 .. Wiring connections See figure. for wiring connections... Line fault detection (See section.. for definition of a line fault) nput line faults (open- or short-circuit) are indicated by an LED and the non-conducting of the output. LFD is enabled/disabled by a switch located on top of the module. Note that if the LFD facility is enabled for switch inputs, the resistors shown in figures. and. MUST be fitted. 0W kw Resistors required only for line fault detection To earth leakage detector nput ve nput ve Earth leakage detection 0 & Output ve Output ve Supply ve Supply ve 0 Figure.: MTL0 wiring diagram and connections Vs Vs 0 to V dc.. Testing Make the safe- and hazardous-area connections shown in figure. and check as shown in table.. MTL0 single-pole changeover relay single-channel dual-output switch/proximity detector with line fault detection and phase reversal The MTL0 enables two safe-area loads to be relay-controlled by a single hazardous-area switch or proximity detector. Phase reversal (see.. and figure.), line fault detection and slave/line fault monitoring configurations are possible... Wiring connections See figure. for wiring connections Note: Reactive loads must be adequately suppressed. 0W kw For contact inputs resistors must be fitted To earth leakage detector 0 Figure.: MTL0 wiring diagram and connections Output Output Vs Vs 0 to V dc 0W kw To earth leakage detector c b a SW 0 Vd kw Vs Vs 0 to V dc nput ve nput ve Earth leakage detection Normally closed (output ) Common (output ) Normally open (output ) 0 Normally closed (output ) Common (output ) Normally open (output ) Supply ve Supply ve Figure.: Test circuit for MTL0 Table. Phase nput Output Channel Line fault reverse Line fault switch status status LED LED switch detection (SW) (-) (yellow) (red) Normal Off a V d < V On Off Reverse Off sc = ma V d = V S Off Off Reverse Off Open V d < V On Off Normal On V oc = VV V d = V S Off On Normal On a V d = V S Off On Normal On c V d < V On Off Normal On b V d = V S Off Off

19 .. Outputs The output relay reflects the status of the input and may be configured to operate in reverse phase (PR) or with line-fault detection (LF). The output relay may be configured either to follow (slave mode) output or as a line-integrity monitor (LFD) (see..). Output in phase with sensor Output in anti-phase with sensor (LFD not affected) MTL0 PWR SLAVE LFD Output LF PR O/P ON.. Line fault detection (See section.. for definition of a line fault) Output follows sensor Output slaves output Output follows sensor Output monitors LFD Output follows sensor & LFD Output slaves output Figure.: Top label of MTL0 with explanation of switch positions Output follows sensor & LFD Output monitors LFD Line-fault detection and the operational mode of output (ie slave to output or LFD) are selected by switches located on the top of the module (see figure.). When LFD is selected for output and there is a line fault in the sensor circuit the output relay is de-energised (providing an alarm output). When LF is selected for output, the output relay is de-energised if there is a line fault in the sensor circuit. Note that resistors must be fitted when using LFD with a contact input; 00Ω to kω in series, and 0kΩ to kω in parallel with the switch... Testing Make the relevant safe- and hazardous-area connections shown in figure. for the tests listed in table.. (Figure. shows the switch positions for configuring output slave/lfd, output line fault (LF) and phase reversal (PR)).. MTL0 solid-state two-channel switch/proximity detector with line fault detection and phase reversal The MTL0 enables each of two safe-area loads to be controlled, through a solid-state output, by a switch or proximity detector in a hazardous area. Line fault detection (LFD) and output phase reversal (see..) facilities are included... Wiring connections See figure.0 for wiring connections. 0W kw 0W kw Resistors required only for line fault detection To earth leakage detector nput ve (Ch ) nput ve (Ch ) Earth leakage detection nput ve (Ch ) nput ve (Ch ) Earth leakage detection Output ve (Ch ) Output ve (Ch ) Output ve (Ch ) Output ve (Ch ) Supply ve Supply ve 0 Figure.0: MTL0 wiring diagram and connections Ch Ch Vs Vs 0 to V dc 0W kw To earth leakage detector c b a SW open 0 Output relay Output relay Vs Vs 0 to V dc kw 0W kw To earth leakage detector Ch c b a Ch open SW 0 kw } Vd } Vd kw Vs Vs 0 to V dc Figure.: Test circuit for MTL:0 Figure.: Test circuit for MTL0 Table. Phase Line fault Output Output Status Fault reverse detection Slave nput test switch position relay relay LED LED Test switch (PR) (LF) (LFD) (terminals & ) (-) (-) (yellow) (red) Normal Off LFD (a) i.e. short-circuit Closed Open On On Reverse Off LFD (a) short-circuit ( sc =ma) Open Open Off On Normal On Slave (a) short-circuit Open Open Off On Normal Off Slave (a) short-circuit Closed Closed On Off Normal Off Slave open-circuit (V oc =VV) Open Open Off Off Normal On Slave open-circuit Open Open Off On Normal Off LFD (b) kω Open Closed Off Off Normal Off LFD (c) 0Ω Closed Closed On Off

20 Table. Phase nput Output Channel Line fault reverse Line fault switch status status LED LED switch detection (SW) (-, -) (yellow) (red) Normal Off a Vd<V On Off Reverse Off a Vd=VS Off Off Reverse Off open Vd<V On Off Normal On open Vd=VS Off On Normal On a Vd=VS Off On Normal On c Vd<V On Off Normal On b Vd=VS Off Off.. Line fault detection (See section.. for definition of a line fault) On both channels, input line faults (open- or short-circuit) are indicated by an LED and the de-energising of the output. LFD is enabled/disabled by switches located on top of the module. Note that if the LFD facility is enabled for switch inputs, the resistors shown in figures.0 and. MUST be fitted... Wiring connections See figure. for wiring connections. Note: Reactive loads must be adequately suppressed... Testing Make the safe- and hazardous-area connections shown in figure. and check status LEDs and relay contacts as in table.... Testing Make the safe- and hazardous-area connections shown in figure. and check the status of the output contacts for each channel in turn (with a kω resistor connected to the other channel) as shown in table... MTL0 single-pole relay twochannel switch/proximity detector with phase reversal (Discontinued, use MTL0) The MTL0 enables two safe-area loads to be relay-controlled by two switches or proximity detectors located in a hazardous area. Output phase reversal (see..) is provided. SW SW Figure.: Test circuit for MTL0 0 Vs Vs 0 to V dc Ch Ch Ch Ch To earth leakage detector nput ve (Ch ) nput ve (Ch ) Earth leakage detection nput ve (Ch ) nput ve (Ch ) Output (Ch ) Output (Ch ) Output (Ch ) Output (Ch ) Supply ve Supply ve 0 Vs Vs 0 to V dc Figure.: MTL0 wiring diagram and connections Ch Ch. MTL0 single-pole relay twochannel switch/proximity detector with line fault detection and phase reversal The MTL0 is similar to the MTL0 but with the addition of line fault detection facilities... Wiring connections See figure. for wiring connections. Note: Reactive loads must be adequately suppressed... Line fault detection (See section.. for definition of a line-fault) Line faults de-energise a dedicated line fault detect relay (between terminals and 0) to provide an alarm facility and are indicated by an LED. Each channel relay will also de-energise (open) when a line fault exists on that channel. LFD is automatic. Note that for switch inputs the resistors shown in figures. and. MUST be fitted for correct LFD operation. Table. Phase reverse Phase reverse Channel Channel Relay Relay nput switch nput switch switch switch status LED status LED contacts contacts (ch ) (ch ) (ch ) (ch ) (yellow) (yellow) (ch ) (ch ) Closed Open Normal Normal On Off Closed Open Closed Closed Normal Normal On On Closed Closed Closed Closed Reverse Reverse Off Off Open Open Open Open Reverse Reverse On On Closed Closed

21 0W To earth leakage detector 0W To earth leakage detector kw 0W kw For contact inputs resistors must be fitted nput ve (Ch ) nput ve (Ch ) Earth leakage detection nput ve (Ch ) nput ve (Ch ) Line fault detection Output (Ch ) Output (Ch ) 0 Line fault detection Output (Ch ) Output (Ch ) Supply ve Supply ve 0 Figure.: MTL0 wiring diagram and connections LFD LFD Ch LFD Ch Vs Vs 0 to V dc kw 0W kw Resistors required only for line fault detection nput ve (Ch ) nput ve (Ch ) Earth leakage detection nput ve (Ch ) nput ve (Ch ) Earth leakage detection Normally-closed contact (Ch ) Common (Ch ) Normally-open contact (Ch ) 0 Normally-closed contact (Ch ) Common (Ch ) Normally-open contact (Ch ) Supply ve Supply ve 0 Figure.: MTL0 wiring diagram and connections Ch Ch Vs Vs 0 to V dc Ch kw Ch 0W kw To earth leakage detector c b a open SW LFD Figure.: Test circuit for MTL0 0 LFD Ch LFD Ch Vs Vs 0 to V dc LFD is enabled/disabled by switches located on the top of the module. Note that if the LFD facility is enabled for switch inputs, the resistors shown in figures. and. MUST be fitted... Testing Make the safe- and hazardous-area connections shown in figure. and check the status of the output contacts for each channel in turn (with a kω resistor connected to the other channel) as shown in table.. To earth leakage detector.. Testing Make the safe- and hazardous-area connections shown in figure. and check the status of the output contacts for each channel in turn (with a kω resistor connected to the other channel) as shown in table.. Table. Output Line-fault nput relay relay (-, -) ( & 0) Open-circuit Open Open Short-circuit Closed Open 0Ω Closed Closed kω Open Closed. MTL0 single-pole, changeover relay, two-channel, switch/proximity detector with line fault detection and phase reversal The MTL0 modules enable each of two safe-area loads to be relaycontrolled by switches or proximity detectors in a hazardous area. Line fault detection (LFD) and output phase reversal (see..) facilities are included... Wiring connections See figure. for wiring connections. Note: Reactive loads must be adequately suppressed... Line fault detection (See section.. for definition of a line fault) On each channel, input line faults (open- or short-circuit) are indicated by an LED and the de-energising of the output. Ch kw Ch 0W kw c b a open SW Figure.: Test circuit for MTL0. MTL0AC single-pole, changeover relay, two-channel, switch/proximity detector with line fault detection and phase reversal The MTL0AC modules enable each of two safe-area loads to be relay-controlled by switches or proximity detectors in a hazardous area. Line fault detection (LFD) and output phase reversal facilities are included (see section.. )... Wiring connections See figure. for wiring connections. Note: Reactive loads must be adequately suppressed... Line fault detection (See section.. for definition of a line fault) 0 On each channel, input line faults (open- or short-circuit) are indicated by an LED and the de-energising of the output. LFD is enabled/disabled by switches located on the top of the module. Note that if the LFD facility is enabled for switch inputs, the resistors shown in figures. and. MUST be fitted. Ch Ch Vs Vs 0 to V dc