MTT MS3707H Slim Plug-In HART Isolator
MTT-MS3700-Series-Dimension

MTT MS3707H Slim Plug-In HART Isolator

SKU: MS3707H Categories: , Tag:
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The MS3707H is a high-performance, slim plug-in distributor designed to supply loop operating power to two-wire transmitters while simultaneously isolating and converting their 4 to 20mA DC current signals into reliable process outputs. Critically engineered for modern smart instrumentation systems, this versatile module seamlessly isolates and sustains bidirectional HART communication signals across the loop barrier without signal attenuation. Optimized for confined spatial layouts, the instrument features a compact 29mm wide footprint designed for convenient wall or DIN rail mounting. It is equipped with robust 4-way galvanic isolation rated for a 2000V AC dielectric strength between the input, output, power, and ground networks, making the MS3707H an exceptional solution for high-density control configurations that require continuous noise rejection and dependable ground loop elimination.

Key Product Features

  • Seamless Smart Protocol Integration: Supports uninterrupted bidirectional HART communication utilizing an isolated frequency bandwidth of 500Hz to 10kHz.
  • Dual-Purpose Application Flexibility: Highly adaptable architecture allows the module to function either as a traditional loop-powering distributor or as a pure 4-20mA current loop isolator.
  • Robust Loop Power Supply & Protection: Delivers a typical transmitter supply voltage of 25V DC at 0% input combined with built-in, continuous short-circuit protection limited at a typical 26mA.
  • High-Integrity Galvanic Isolation Barrier: Engineered with a premium multi-channel barrier boasting a 100MΩ minimum insulation resistance and 2000V AC dielectric protection to safeguard backend systems.
  • Industrial-Grade Construction: Enclosed in a flame-retardant UL94V-0 rated ABS resin housing featuring nickel-plated steel M3.5 terminals and a standard HumiSeal® polyurethane conformal coating for high environmental resilience.
Technical Specifications
● POWER SECTION
Power Requirements100 to 240V AC: 85 to 264V AC (47 to 63Hz)
24V DC: 24V DC ±10%
100 to 240V DC: 85 to 264V DC [cite: 1905]
Power Supply SensitivityBetter than ±0.1% of span for each power supply range[cite: 1905].
Power Line Fuse160mA fuse is installed as standard[cite: 1905].
Power Consumption
100-240V AC24V DC100-240V DC
7.7VA max [cite: 1939]2.2W max [cite: 1939]2.9W max [cite: 1939]
● INPUT SECTION
Input Signal4 to 20mA DC from 2-wire transmitters[cite: 1916, 1917].
Input Resistance250Ω[cite: 1918].
Transmitter Power SupplyOutput Voltage: 25V, typical at 0% input | 18V, typical at 100% input[cite: 1920, 1921].
Maximum Drive Current: 25mA, typical[cite: 1922].
Short-Circuit ProtectionLimit Current: 26mA, typical[cite: 1923].
Permissible Short-Circuit Duration: Continuous[cite: 1924].
● OUTPUT SECTION
Output Signal Options4 to 20mA DC (Standard Code A)[cite: 1896].
Maximum Output Load600Ω maximum[cite: 1929].
*Note: Requires 250Ω ±10% for active HART communication loop protocols[cite: 1930, 1931].
Zero AdjustmentApprox. ±5% of span (Adjustable via front-accessible trimmer)[cite: 1932, 1933].
Span AdjustmentApprox. ±5% of span (Adjustable via front-accessible trimmer and internal rotary switch)[cite: 1934, 1935, 1936].
● HART COMMUNICATION
Frequency Bandwidth500Hz to 10kHz (with a maximum attenuation limit of -10dB)[cite: 1938].
Transmission GainApprox. -3dB (evaluated over a range of 1kHz to 3kHz with a calibrated 250Ω load)[cite: 1938].
Communication ModeBidirectional transparent protocol[cite: 1938].
● PERFORMANCE
Accuracy RatingBetter than ±0.1% of span (at 25°C ±5°C)[cite: 1946].
Temperature EffectBetter than ±0.2% of span per 10°C shift in ambient temperature conditions[cite: 1946].
Response Time500ms maximum (0 to 90%) matching a step input drive at 100%[cite: 1946].
CMRR100dB minimum (evaluated at 500V AC, 50/60Hz)[cite: 1946].
Galvanic Isolation4-way isolation configured among input, output, power lines, and ground earth[cite: 1946].
Insulation Resistance100MΩ minimum measured under 500V DC across input, output, power, and ground[cite: 1946].
Dielectric Test RatingsInput / Output / [Power, Ground]: 2000V AC for 1 full minute (Cutoff leakage current: 0.5mA)[cite: 1946].
Power / Ground: 2000V AC for 1 full minute (Cutoff leakage current: 5mA)[cite: 1946].
Surge Withstand CapabilityTested and certified in strict accordance with industrial specification ANSI/IEEE C37.90.1-1989[cite: 1946].
● PHYSICAL
Mounting ConfigurationSurface wall mounting or standard heavy industrial DIN rail track installation[cite: 1946].
Wiring ConnectionsM3.5 terminal screw blocks bundled with drop-out prevention screws and clear power terminal insulation block cover[cite: 1946].
Fastening Torque0.8 to 1.0 [Nm] recommended structural assembly torque[cite: 1946].
External DimensionsW29 × H86 × D125 mm (Total volume inclusive of basic socket base assembly)[cite: 1946].
Net Weight ElementsMain unit module body: 120g max. | Base plug-in socket portion: 80g max.[cite: 1946].
● MATERIAL
Enclosure ShellABS resin housing molded to meet UL94V-0 flammability safety class[cite: 1946].
Terminal BlocksPBT resin structural blocks conforming to UL94V-0 compliance criteria[cite: 1946].
Terminal block Safety CoverPC resin cover panel structured under UL 94V-2 flame retardancy rules[cite: 1946].
DIN Rail Clip StopperPP resin molded compound rated at UL 94HB resistance class[cite: 1946].
Screw TerminalsIndustrial-grade high-tensile nickel-plated steel[cite: 1946].
Contact InterfacesHigh-grade industrial brass finished with a uniform 0.2µm gold plating finish layer[cite: 1946].
Internal PCB LayersWoven glass fabric combined with structural epoxy resin core (FR-4: UL 94V-0 certified)[cite: 1946].
Conformal Anti-Humidity CoatingHumiSeal 1A27NS premium polyurethane defensive thin-film protective formulation[cite: 1946].
● STANDARDS CONFORMITY
Operating Environmental ParametersAmbient Operating Ranges: Temperature envelope: -5 to 55°C | Atmospheric Relative Humidity capacity: 5 to 90% RH (fully non-condensing format)[cite: 1946].
Safe Storage Conditions: Warehouse long-term safe storage temperature rating limits: -10 to 60°C[cite: 1946].
* HumiSeal® is a registered trademark of Chase Corporation[cite: 1963].

Download MTT MS3707H Slim Plug-In HART Isolator information here

Datasheet: MTT_SpecSheet_MS3707H_Rev11_E
Manual:

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