MTT MS3704SW Slim Plug-In High-Level Signal Conditioner

The MS3704SW is a high-performance, slim plug-in high-level signal conditioner (isolator) designed for precise industrial process control and automation systems. Featuring a space-saving 29mm wide housing optimized for wall or DIN rail mounting, this versatile instrument accepts a 1-5V DC voltage or 4-20mA DC current loop input and converts it into an isolated dual output. Engineered with comprehensive 4-way isolation (Input to Output 1 to Output 2 to Power) rated for a 2000V AC dielectric strength, the MS3704SW ensures exceptional signal integrity, robust noise immunity, and reliable ground loop elimination in demanding factory environments. With integrated front and rear selector switches, engineering teams can seamlessly match input and output configurations to local instrumentation requirements without requiring entirely separate hardware models.

Key Product Features

  • Field-Selectable I/O Configurations: Built-in selector switches allow easy setting of either 1-5V DC or 4-20mA DC signals for both the input and dual isolated outputs.
  • Robust 4-Way Galvanic Isolation: Provides complete 4-way isolation between input, output 1, output 2, and power channels, featuring a 2000V AC dielectric strength for 1 minute to prevent ground loop propagation.
  • High-Accuracy Signal Processing: Delivers an accuracy rating better than ±0.1% of span (at 25°C ±5°C) and a rapid response time of 85ms maximum (0 to 90%) for dynamic control loops.
  • Integrated Burnout Protection: Selectable upscale or downscale burnout protection for voltage inputs, safeguarding downstream systems during open-circuit faults.
  • Compact, Industrial-Grade Build: Enclosed in a UL 94V-0 rated ABS resin housing with reliable M3.5 screw terminal connections, measuring only W29 × H86 × D125 mm for maximum DIN rail density.
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: 37]
Power SensitivityBetter than ±0.1% of span for each power supply range. [cite: 37]
Power Line Fuse160mA fuse is installed (standard). [cite: 37]
Power Consumption
100-240V AC24V DC100-240V DC
6.5VA max. [cite: 41]2.0W max. [cite: 42]2.5W max. [cite: 43]
● INPUT SECTION
Input Signal1 to 5V DC or 4 to 20mA DC (Selectable by the rear-accessible switch) [cite: 46, 47]
Input ResistanceVoltage Input: 1MΩ min. with or without power. [cite: 49, 50]
Current Input: 250Ω [cite: 51, 52]
Allowable Input Voltage / CurrentVoltage Input: 30V DC max., continuous. [cite: 54, 55]
Current Input: 40mA DC max., continuous. [cite: 56, 58]
● OUTPUT SECTION
Output Signal1 to 5V DC or 4 to 20mA DC (Selectable by the front-accessible switch) [cite: 60, 61]
Allowable Output LoadVoltage Output (DC): Output 1: 2mA max. | Output 2: 2mA max. [cite: 22]
Current Output (DC): Output 1: 750Ω max. | Output 2: 350Ω max. [cite: 22]
Zero AdjustmentOutput 1 & Output 2: Approx. ±5% of span (Adjustable by the front-accessible trimmer) [cite: 22]
Span AdjustmentOutput 1 & Output 2: Approx. ±5% of span (Adjustable by the front-accessible trimmer) [cite: 22]
Burnout ProtectionSelectable between upscale and downscale only for voltage input. (Downscale for current input) [cite: 22]
● PERFORMANCE
Accuracy RatingBetter than ±0.1% of span (at 25°C ±5°C). [cite: 34]
Temperature EffectBetter than ±0.2% of span per 10°C change in ambient. [cite: 34]
Response Time85ms max. (0 to 90%) with a step input at 100%. [cite: 34]
CMRR100dB min. (500V AC, 50/60Hz) [cite: 34]
Isolation4-way isolation between input, output 1, output 2, and power. [cite: 34]
Insulation Resistance100MΩ min. (@500V DC) between input, output 1, output 2, power, and ground. [cite: 34]
Dielectric StrengthInput / [Output 1, Output 2] / [Power, Ground]: 2000V AC for 1 minute (Cutoff current: 0.5mA)
Power / Ground: 2000V AC for 1 minute (Cutoff current: 5mA)
Output 1 / Output 2: 500V AC for 1 minute (Cutoff current: 0.5mA) [cite: 34]
Surge Withstand CapabilityTested as per ANSI/IEEE C37.90.1-1989. [cite: 34]
Operating EnvironmentAmbient temperature: -5 to 55°C | Humidity: 5 to 90% RH (non-condensing) [cite: 34]
Storage Temperature-10 to 60°C [cite: 34]
● PHYSICAL
InstallationWall / DIN rail mounting [cite: 69]
WiringM3.5 screw terminal connection (with a power terminal block cover & drop-proof screws) [cite: 69]
Screwing Torque0.8 to 1.0 [Nm] * Recommended [cite: 69]
External DimensionsW29 × H86 × D125 mm (including the mounting screw and socket) [cite: 69]
WeightMain unit: 120g max. | Socket: 80g max. [cite: 69]
● MATERIAL
HousingABS resin (UL 94V-0) [cite: 69]
Terminal BlockPBT resin (UL 94V-0) [cite: 69]
Terminal Block CoverPC resin (UL 94V-2) [cite: 69]
DIN Rail StopperPP resin (UL 94HB) [cite: 69]
Screw TerminalNickel-plated steel [cite: 69]
Contacts Material & FinishBrass with 0.2µm gold plating [cite: 71, 72]
Printed Circuit BoardGlass fabric, epoxy resin (FR-4: UL 94V-0) [cite: 75]
● STANDARDS CONFORMITY
EC Directive ConformityEMC Directive (2014/30/EU): EN61326-1:2013 [cite: 79, 80]
Low Voltage Directive (2014/35/EU): IEC61010-1, EN61010-1:2010/A1:2019 [cite: 81, 82, 83]
Safety RatingsInstallation Category II [cite: 84]
Pollution Degree 2 [cite: 85]
Maximum operating voltage: 300V [cite: 86]
Reinforced insulation between [input/output/GND] and power. [cite: 86, 87]

Download MTT MS3704SW Slim Plug-In High-Level Signal Conditioner information here

Datasheet: MTT_SpecSheet1_MS3704SW_Rev150_E
Manual:

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