MTL 7700 Series
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Dual channel relay or solid state modules offerthe highest packing density with only 6.3mm per channel and when used in conjunction with the power bus, offer users the minimum of wiring with the maximum packing density and the lowest cost per channel. The MTL774X range of barriers offer a NAMURcompatible input and a choice of relay or solid state output. The solid state outputs are floating so switching to ground or from a power rail into an input is also possible. The solid state interface also provides a high frequency transfer for use in flow or rotation applications. MTL7700 active modules are protected with anelectronic fuse for the majority of applications. The MTL7798 active fused, power feed module can protect up to 40 other modules using the bussed power facility and provides a clear indication of a trip condition via a red LED. > Since its introduction in 1984 The MTL7700 Series follows closely in thefootsteps of the MTL700 but as a DIN rail mounting barrier providing quick and easy installation without the need for special hardware. the MTL700Series barrier has established itself as the worldwide standard for safety barriers. Known for its quality and reliability, the MTL700 Series is widely used in applications all over the world. Removable terminals are used MTL7700 barriers clamp simply and securelyonto standard T-section DIN rail, simultaneously making a reliable IS earth connection. for ease ofinstallation, maintenance and for providing a loop disconnect by simply unplugging the terminals from the side of the module. Wire entry is also angled to assist wiring within limited space enclosures. For applications where field power isrequired for switch inputs or 2-wire transmitters, the MTL7700 Series provides a bussed power feed facility. When used in conjunction with the MTL7798 power feed module the user has a fully protected, electronically fused supply to many barriers with no additional wiring required. > EUROPE (EMEA) Tel: +44 (0)1582 723633 Fax: +44 (0)1582 422283 AMERICAS Tel: +1 603 926 0090Fax: +1 603 926 1899 ASIA PACIFIC Tel: +65 487 7887Fax: +65 487 7997 May 2005 E-mail: enquiry@mtl-inst.com Web site: www.mtl-inst.com size="-2">

ModelNo.Safety descriptionPolaritiesavailable+ acBasic circuitHazardousSafeFuseratingmAVwkg at 10(1)ֵAVMax. end-to-endresistance Application123456 VmaxV MTLV Ω mA Ω 7706+2830093 √ Transmitters35507707+2830093 See 'HOW THEY WORK'and'ACTIVE / ELECTRONICALLYPROTECTED BARRIERS' See 'ACTIVE / ELECTRONICALLYPROTECTED BARRIERS' √ Switches 355028diode3550 See additionalspecification 7707P+ 28164171 √ Transmitters, switches,355028diode controller outputs IIB3550 7710+ 1050200 √ 6V dc & 4V ac systems756.07.050 >

2ѵA under all conditions Safe-area load resistance 0 to 500 Ω Supply current 45mA typical at 20mA and 24V supply 60mA maximum at 20mA and 20V supply > The MTL7707+ is a 2-channel shunt-diode safety barrier similar to the MTL7787+ but with built-in electronic overvolt protection. It is intended primarily for safeguarding a hazardous-area switch controlling a relay, opto-coupler or other safe-area load from an unregulated dc supply in the safe area. The outgoing channel accepts supply voltages up to +35V and is protected against reverse voltages: the return channel is unaffected by voltages...

Ω /channel to minimise span changesand its channels track within 0.15 Ω (between 20 to +60ְC) tominimise zero shift with temperature. RTDs For 3-wire RTDs, a single MTL7755ac barrier is the most economical choice. This is suitable for use with a floating bridge the two leads from the bridge arms are protected by the barrier with the third (supply) lead being earthed through the barrier. The barrier has a low end-to-end resistance of only 19 > HazardousAreaSafeArea ֢Ħ between 20 and 60ְC. > 34 12 MTL7755ac Receiver 34 12 MTL7756ac 7 5 Receiver 4-wire constant-current circuits do not need...

IMB57 Insulating mounting block > One required at each end of a tagging strip/earth rail. Suitable forlow-profile (7.5mm) and high-profile (15mm) symmetrical DIN rail. > TGL7700ERB57OTAG57 ERL7ETM7 Snap off extensionwhen using IMB57as a central support 82mm 135mm 28mm IMB57 10mm earthclamp 66mm15mm 14mm earth-railclamp ERB57O Earth-rail bracket, offset > THR2/THR7000ERB57S ISP7000ETL7000 Nickel-plated; supplied with two push fasteners, one 14mm earth-rail clamp and one 10mm earth clamp for cables ≤ 16mm > 2. in lower position 3mm 10mm MTL7700 Series barriers mount easily and quickly onto...

Two methods of tagging are available which can be used separatelyor together: 1) Individual barrier identificationTH7700 barrier identifiers TH7700 barrier identifiers are supplied clipped on to the tops of individual barriers to provide transparent holders for identification labels. 2) MTL7700 barriers Select by barrier number and polarity, e.g. MTL7728+ Mounting accessories THR2Standard DIN-rail, 35 x 7.5mmTHR7000T-section DIN-rail, specially-plated,35 x 7.5mm, 1m lengthISP7000Insulating spacer Standard earthing/earth-rail accessories ETL7000Earth terminal, DIN-rail mounted...