MTT MS3704-S Slim Plug-In High-Level Signal Conditioner

The MTT MS3704-S is a slim plug-in high-level signal conditioner powered from a 24V AC supply, giving it a natural home in panels built around a 24V AC control transformer rather than mains AC or DC power. It accepts a variety of standard DC current or voltage signals and delivers them as one or two galvanically isolated DC outputs, standardizing field signals into a common, safely isolated form for downstream equipment.

Like the rest of the plug-in transmitter range, the MS3704-S clips into its own socket base so the unit can be swapped for calibration or replacement in seconds without disturbing the field wiring. Where a dual-output configuration is used, both outputs stay isolated from each other, the input, and the power supply, letting one signal drive a control loop and an independent monitoring or logging system at the same time. Conformal-coated construction and gold-plated contacts help it hold up in humid environments, while wall or DIN rail mounting keeps installation straightforward.

Power Supply24V AC ±15% (47-63Hz), approx. 2.0VA max (single output) or 2.5VA max (dual output); 160mA fuse
Input TypesDC current (100μA to 200mA) or DC voltage (200mV to 600V); common ranges include 4-20mA, 0-20mA, 0-10V, ±10V
Input Resistance100Ω to 1MΩ minimum, depending on signal type
Allowable Input Voltage30V DC max. continuous
Output0-20mA DC or -10V to +10V DC (single or isolated dual output)
Zero & Span AdjustmentApproximately ±5% of span
Isolation4-way isolation between input, output, power, and ground
AccuracyBetter than ±0.1% of span (at 25°C±5°C)
Response Time85ms maximum (0-90%); 10ms with /K fast-response option
Temperature EffectBetter than ±0.2% of span per 10°C change
CMRRMinimum 100dB (500V AC, 50/60Hz)
Insulation Resistance100MΩ minimum at 500V DC
Dimensions (W x H x D)29mm x 86mm x 125mm
WeightMain unit up to 120g; socket up to 80g
MountingWall or DIN rail mounting, plug-in socket base
TerminalsM3.5 screw terminals, 0.8-1.0Nm torque
Operating Temperature-5 to 55°C ambient (storage: -10 to 60°C)
Operating Humidity5-90% RH, non-condensing
ConstructionFlame-resistant resin housing (UL 94); gold-plated brass contacts with polyurethane anti-humidity coating

Download MTT MS3704-S Slim Plug-In High-Level Signal Conditioner information here

Datasheet: MTT_SpecSheet_MS3704-S_Rev11_E

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