{"product_id":"mtl5061-mtl5000-series-dual-channel-fire-detector-interface","title":"MTL5061 MTL5000 Series | Dual-Channel Fire Detector Interface","description":"\u003ch3\u003e\u003cb\u003eMTL5061 | Dual-Channel Fire and Smoke Detector Interface\u003c\/b\u003e\u003c\/h3\u003e\n\u003cp\u003eThe \u003cb\u003eMTL5061\u003c\/b\u003e is a loop-powered, two-channel interface from MTL. It connects conventional fire and smoke detectors in hazardous areas to safe-area monitoring circuits.\u003c\/p\u003e\n\u003cp\u003eEach channel transfers detector circuit changes to its corresponding safe-area circuit. This allows control-room equipment to monitor field detector conditions without placing conventional monitoring equipment in the hazardous area.\u003c\/p\u003e\n\u003cp\u003eThe \u003cb\u003eMTL5061\u003c\/b\u003e provides reverse input polarity protection. It also supports optional non-fail earth fault detection through an external MTL4220 earth leakage detector.\u003c\/p\u003e\n\u003ch3\u003e\u003cb\u003eTechnical Specifications | At a Glance\u003c\/b\u003e\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eMTL\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel\u003c\/td\u003e\n\u003ctd\u003e\u003cb\u003eMTL5061\u003c\/b\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct series\u003c\/td\u003e\n\u003ctd\u003eMTL5000 Series\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct type\u003c\/td\u003e\n\u003ctd\u003eLoop-powered, dual-channel fire and smoke detector interface\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eChannel count\u003c\/td\u003e\n\u003ctd\u003e2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDetector compatibility\u003c\/td\u003e\n\u003ctd\u003eConventional fire and smoke detectors\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNominal current range\u003c\/td\u003e\n\u003ctd\u003e1 to 40 mA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLoop supply voltage\u003c\/td\u003e\n\u003ctd\u003e6 to 35 V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eReverse polarity protection\u003c\/td\u003e\n\u003ctd\u003eIntegral input circuit protection\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTransfer accuracy\u003c\/td\u003e\n\u003ctd\u003eBetter than 400 µA at 20°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStep response\u003c\/td\u003e\n\u003ctd\u003eSettles within 500 µA of final value in 30 ms\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTemperature drift\u003c\/td\u003e\n\u003ctd\u003eLess than 10 µA\/°C from −20°C to +60°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum hazardous-area output\u003c\/td\u003e\n\u003ctd\u003e28 V from 300 Ω\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eQuiescent safe-area current\u003c\/td\u003e\n\u003ctd\u003eLess than 400 µA per channel at 24 V DC, with field terminals open\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum power dissipation\u003c\/td\u003e\n\u003ctd\u003e0.7 W at 24 V with 40 mA per channel; 1.2 W at 35 V with 40 mA per channel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSafety parameters\u003c\/td\u003e\n\u003ctd\u003e28 V, 300 Ω, 93 mA; Um = 250 V RMS or DC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003e\u003cb\u003eSignal Transfer and Channel Behavior\u003c\/b\u003e\u003c\/h3\u003e\n\u003cp\u003eThe \u003cb\u003eMTL5061\u003c\/b\u003e transfers detector circuit changes through two independent channels. Each channel has its own field input, safe-area output, and earth leakage detector connection.\u003c\/p\u003e\n\u003cp\u003eThe manufacturer specifies the minimum output voltage at 20°C using two limits. The lower value applies:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eVin − (0.38 × current in mA) − 2 V\u003c\/li\u003e\n\u003cli\u003e21 V − (0.35 × current in mA)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eEngineers should evaluate these limits against the actual loop supply and detector current. The available output voltage decreases with increasing current.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eImportant:\u003c\/b\u003e The published transfer accuracy describes current transfer performance. It does not specify a digital resolution or a separate measurement sensitivity.\u003c\/p\u003e\n\u003ch3\u003e\u003cb\u003eTerminal Map | Two Independent Channels\u003c\/b\u003e\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eTerminal\u003c\/th\u003e\n\u003cth\u003eFunction\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003ctd\u003eChannel 1 output negative\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2\u003c\/td\u003e\n\u003ctd\u003eChannel 1 output positive\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e3\u003c\/td\u003e\n\u003ctd\u003eChannel 1 earth leakage detection\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e4\u003c\/td\u003e\n\u003ctd\u003eChannel 2 output negative\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003ctd\u003eChannel 2 output positive\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e6\u003c\/td\u003e\n\u003ctd\u003eChannel 2 earth leakage detection\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e8\u003c\/td\u003e\n\u003ctd\u003eChannel 2 input negative\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e9\u003c\/td\u003e\n\u003ctd\u003eChannel 2 input positive\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e11\u003c\/td\u003e\n\u003ctd\u003eChannel 1 input negative\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e12\u003c\/td\u003e\n\u003ctd\u003eChannel 1 input positive\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003eTerminals 3 and 6 support optional earth leakage detection. Confirm the complete wiring arrangement against the manufacturer's connection diagram.\u003c\/p\u003e\n\u003ch3\u003e\u003cb\u003eHazardous-Area Protection\u003c\/b\u003e\u003c\/h3\u003e\n\u003cp\u003eThe manufacturer specifies use with detectors in Zone 0, IIC, T4–T6 hazardous areas, subject to suitable certification. The specification also identifies Division 1, Group A hazardous locations.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eThe input circuit includes reverse polarity protection.\u003c\/li\u003e\n\u003cli\u003eThe hazardous-area output has a specified maximum of 28 V from 300 Ω.\u003c\/li\u003e\n\u003cli\u003eThe safety description specifies 28 V, 300 Ω, and 93 mA.\u003c\/li\u003e\n\u003cli\u003eUm is 250 V RMS or DC.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eConfirm the module's certification and the complete intrinsically safe loop design before installation. The supplied specification does not include certificate numbers.\u003c\/p\u003e\n\u003ch3\u003e\u003cb\u003eOptional Earth Fault Monitoring\u003c\/b\u003e\u003c\/h3\u003e\n\u003cp\u003eThe \u003cb\u003eMTL5061\u003c\/b\u003e supports optional non-fail earth fault detection. Connect an MTL4220 earth leakage detector to terminals 3 and 6.\u003c\/p\u003e\n\u003cp\u003eThis arrangement monitors earth faults on either line of each channel. The interface continues operating when the earth leakage detector declares a fault.\u003c\/p\u003e\n\u003cp\u003eThe MTL4220 introduces a 100 µA ripple at 1 Hz into the field circuit. Check whether this ripple affects the connected detector or monitoring equipment.\u003c\/p\u003e\n\u003ch3\u003e\u003cb\u003eCompatible Devices and Typical Applications\u003c\/b\u003e\u003c\/h3\u003e\n\u003cp\u003eThe interface suits conventional detector circuits that meet its electrical and hazardous-area requirements.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eConventional fire detectors:\u003c\/b\u003e Transfers detector circuit changes to safe-area monitoring equipment.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eConventional smoke detectors:\u003c\/b\u003e Supports compatible detector loops in classified process areas.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eHazardous-area fire monitoring:\u003c\/b\u003e Connects field detector circuits with safe-area fire monitoring or control equipment.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eIndustrial process facilities:\u003c\/b\u003e Supports detector monitoring around suitable hazardous-area installations.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eRefineries and chemical plants:\u003c\/b\u003e Provides an interface for compatible conventional detector circuits in classified zones.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eRemote detector circuits:\u003c\/b\u003e Separates field detector wiring from safe-area monitoring circuits.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eVerify detector current, circuit voltage, alarm behavior, and system compatibility before selecting the module. The \u003cb\u003eMTL5061\u003c\/b\u003e is an interface component. It does not replace a fire alarm panel or a complete approved fire protection system.\u003c\/p\u003e\n\u003ch3\u003e\u003cb\u003eInstallation and Commissioning Checklist\u003c\/b\u003e\u003c\/h3\u003e\n\u003col\u003e\n\u003cli\u003eConfirm the detector type and its electrical operating range.\u003c\/li\u003e\n\u003cli\u003eVerify the loop supply falls between 6 and 35 V DC.\u003c\/li\u003e\n\u003cli\u003eIdentify channel 1 and channel 2 before wiring.\u003c\/li\u003e\n\u003cli\u003eConnect each detector to its assigned input terminals.\u003c\/li\u003e\n\u003cli\u003eConnect the corresponding safe-area monitoring circuit to the output terminals.\u003c\/li\u003e\n\u003cli\u003eCheck polarity and terminal tightness.\u003c\/li\u003e\n\u003cli\u003eVerify the hazardous-area installation against the applicable intrinsic safety documentation.\u003c\/li\u003e\n\u003cli\u003eTest each channel using the approved detector test procedure.\u003c\/li\u003e\n\u003cli\u003eConfirm the safe-area system recognizes the expected detector state.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp\u003eTest both channels independently. This helps confirm correct channel assignment and prevents cross-wiring errors.\u003c\/p\u003e\n\u003ch3\u003e\u003cb\u003eDiagnostics | Troubleshooting Field Conditions\u003c\/b\u003e\u003c\/h3\u003e\n\u003cp\u003eThe supplied specification does not identify a dedicated status LED or built-in diagnostic display. Engineers can still investigate field circuit behavior through measured loop values and system indications.\u003c\/p\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eObserved condition\u003c\/th\u003e\n\u003cth\u003eRecommended checks\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eDetector activation does not reach the safe area\u003c\/td\u003e\n\u003ctd\u003eCheck detector operation, field wiring, channel assignment, and safe-area input response.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUnexpected loop current\u003c\/td\u003e\n\u003ctd\u003eMeasure current, inspect polarity, and compare the circuit against detector specifications.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOne channel behaves differently\u003c\/td\u003e\n\u003ctd\u003eCompare the two channel connections and test each detector separately.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEarth fault indication appears\u003c\/td\u003e\n\u003ctd\u003eInspect field wiring insulation and verify the MTL4220 connection where installed.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput voltage appears insufficient\u003c\/td\u003e\n\u003ctd\u003eCheck loop supply, detector current, and the manufacturer's minimum output voltage limits.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cb\u003eField diagnostic example:\u003c\/b\u003e A detector activates, but the safe-area system does not register the change. An engineer verifies the detector current first. The engineer then checks the assigned channel and measures its safe-area output. This process helps isolate detector, wiring, and interface problems.\u003c\/p\u003e\n\u003ch3\u003e\u003cb\u003eGlobal PLC Spare HUB's Insight\u003c\/b\u003e\u003c\/h3\u003e\n\u003cp\u003eWhen replacing a two-channel detector interface, engineers should verify channel mapping before disconnecting existing wiring. Similar terminal layouts do not guarantee identical channel assignments.\u003c\/p\u003e\n\u003cp\u003eFor example, a facility may monitor two separate smoke detector circuits through one \u003cb\u003eMTL5061\u003c\/b\u003e. During replacement, the technician labels both field inputs and safe-area outputs. The technician then tests each detector circuit independently and confirms the correct alarm indication.\u003c\/p\u003e\n\u003cp\u003eOptional earth fault monitoring requires additional attention. The MTL4220 introduces a small periodic ripple into the field circuit. Engineers should consider this behavior when reviewing current trends or investigating unusual readings.\u003c\/p\u003e\n\u003cp\u003eFor procurement, provide the detector model, loop supply, hazardous-area classification, and existing wiring details. These facts help determine whether the \u003cb\u003eMTL5061\u003c\/b\u003e fits the installation.\u003c\/p\u003e\n\u003ch3\u003e\u003cb\u003eSelection Guidance | Before Ordering\u003c\/b\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eConfirm the application uses conventional fire or smoke detectors.\u003c\/li\u003e\n\u003cli\u003eCheck that both channels meet the required detector current range.\u003c\/li\u003e\n\u003cli\u003eVerify loop supply voltage and available output voltage.\u003c\/li\u003e\n\u003cli\u003eDetermine whether the installation needs optional earth fault monitoring.\u003c\/li\u003e\n\u003cli\u003eReview the hazardous-area certification and loop documentation.\u003c\/li\u003e\n\u003cli\u003eConfirm the safe-area equipment accepts the module's output behavior.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cb\u003ePackaging, Warranty, and Shipping\u003c\/b\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eModel:\u003c\/b\u003e MTL5061 dual-channel detector interface.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003ePackaging:\u003c\/b\u003e Protective packaging for industrial electronic equipment.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eWarranty:\u003c\/b\u003e 12 months, subject to the seller's warranty terms.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eShipping carriers:\u003c\/b\u003e FedEx, UPS, and DHL.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eDispatch estimate:\u003c\/b\u003e 24–48 hours, subject to stock confirmation and order processing.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eContact Global PLC Spare HUB to confirm availability, package contents, warranty coverage, and delivery arrangements.\u003c\/p\u003e\n\u003ch3\u003e\u003cb\u003eFrequently Asked Questions\u003c\/b\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cb\u003e1. Can the MTL5061 monitor two different detector circuits at the same time?\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003eYes. It has two channels, each with its own input and output terminals. Confirm that both detector circuits meet the module's electrical requirements.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003e2. Does the module provide a separate earth fault alarm output?\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003eThe supplied specification describes optional earth leakage detection through an MTL4220 connected to terminals 3 and 6. Confirm how the associated fault indication reaches the wider monitoring system.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003e3. How should engineers assess output voltage under load?\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003eUse the specified minimum output voltage equations and the actual loop current. Check the receiving circuit's voltage requirements under normal and alarm conditions.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003e4. Can the MTL5061 replace a different two-channel safety interface?\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003eNot solely because both units have two channels. Compare detector compatibility, loop behavior, terminal assignments, output limits, and hazardous-area approvals before substitution.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003e5. What details help obtain the correct replacement?\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003eProvide the full model number, detector type, loop voltage, channel configuration, and hazardous-area requirements. Existing wiring diagrams and system details can help verify suitability before purchase.\u003c\/p\u003e\n\u003ch3\u003e\u003cb\u003eRequest a Quote | MTL5061\u003c\/b\u003e\u003c\/h3\u003e\n\u003cp\u003eContact \u003cb\u003eGlobal PLC Spare HUB\u003c\/b\u003e for pricing, availability, technical selection support, and shipping options for the \u003cb\u003eMTL5061\u003c\/b\u003e. Include your detector model and application details to help confirm compatibility.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0722\/7863\/8774\/files\/MTL5061.png?v=1792724124\" alt=\"\"\u003e\u003c\/p\u003e","brand":"MTL","offers":[{"title":"Default Title","offer_id":45014020260022,"sku":"MTL5061","price":146.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0722\/7863\/8774\/files\/MTL5061_1_adba7b05-b71f-4c34-8dcb-7f46db3899de.jpg?v=1792724146","url":"https:\/\/www.plcsparehub.com\/products\/mtl5061-mtl5000-series-dual-channel-fire-detector-interface","provider":"Global PLC Spare Hub","version":"1.0","type":"link"}