The MTT MS3704 is a slim plug-in high-level signal conditioner, mounted on a plug-in base socket for quick swap-out without rewiring. It accepts DC current (100µA to 200mA) or DC voltage (200mV to 600V), with common ranges including 4~20mA, 0~20mA, 0~10V, 4~10V, ±5V, ±10V, and input resistance from 10Ω to 1MΩ depending on signal type. Maximum continuous input is 30V DC (voltage) or 40mA DC (current).
Output is 0~20mA DC current or 10mV-20V DC voltage, available as a single output or an isolated dual output, with output load up to 750Ω for a single 4~20mA output, or 550Ω/350Ω for dual outputs. There is 4-way isolation between input, output 1, output 2, power, and ground.
Accuracy is better than ±0.1% of span (at 25°C±5°C), with temperature effect better than ±0.2% of span per 10°C change. Standard response time is 85ms max (0-90%); a /K fast-response option brings this down to 10ms. CMRR is 100dB minimum, with insulation resistance of 100MΩ minimum at 500V DC and dielectric strength of 2000V AC for one minute.
The unit mounts on wall or DIN rail via a plug-in socket base, with M3.5 screw terminals, weighing up to 120g for the main unit and 80g for the socket, with overall dimensions of 29mm × 86mm × 125mm. Power supply is flexible: 100-240V AC, 24V DC, or 100-240V DC (4.0VA max single, 5.0VA max dual at 100-240V AC).
| Input Types | DC current (100μA to 200mA) or DC voltage (200mV to 600V); common ranges include 4-20mA, 0-20mA, 0-10V, 4-10V, ±5V, ±10V |
| Input Resistance | 10Ω to 1MΩ depending on signal type |
| Allowable Input | 30V DC max. continuous (voltage inputs); 40mA DC max. continuous (current inputs) |
| Output | 0-20mA DC current or 10mV-20V DC voltage (single or isolated dual output) |
| Output Load (4-20mA) | 750Ω max single output; 550Ω/350Ω max for dual outputs |
| Isolation | 4-way isolation between input, Output 1, Output 2, power, and ground |
| Power Supply | 100-240V AC, 24V DC, or 100-240V DC (4.0VA max single, 5.0VA max dual at 100-240V AC) |
| Accuracy | Better than ±0.1% of span (at 25°C±5°C) |
| Response Time | 85ms maximum (0-90%); 10ms with /K fast-response option |
| Temperature Effect | Better than ±0.2% of span per 10°C change |
| CMRR | Minimum 100dB |
| Insulation Resistance | 100MΩ minimum at 500V DC |
| Dielectric Strength | 2000V AC for one minute |
| Dimensions (W x H x D) | 29mm x 86mm x 125mm |
| Weight | Main unit up to 120g; socket up to 80g |
| Mounting | Wall or DIN rail mounting, plug-in socket base |
| Terminals | M3.5 screw terminals |
| Operating Temperature | -5 to 55°C ambient |
| Operating Humidity | 5-90% RH, non-condensing |
Frequently Asked Questions
What is the MTT MS3704 used for?
It reads an existing DC current or voltage signal (like 4-20mA or 0-10V) and re-transmits it as a clean, isolated output — useful for feeding a second system, re-ranging a signal, or breaking a ground loop.
Can the MS3704 convert between different signal ranges, like 0-10V to 4-20mA?
Yes — within its accepted input and output ranges, the MS3704 can re-range a signal as well as isolate it. Tell us your source signal and the range your receiving equipment needs.
What’s the difference between the MS3704 and the MS3704 variants (MS3704-D1, MS3704-S, MS3704HI, MS3704IS, etc.)?
These are variants within the MS3704 family with different input ranges, isolation configurations, or accuracy specs. If you’re replacing an existing unit, check the exact model code on the old unit’s label, or send us your input/output requirements and we’ll confirm the right variant.
Is a fast-response version available?
Yes — the standard MS3704 responds in 85ms, and a /K fast-response option brings that down to 10ms for control loops that need a quicker reaction.
How do I know which MS3704 model I need?
Send us your input signal type and range, whether you need a single output or isolated dual output, and the output signal your PLC or DCS expects. We’ll confirm the right model before you order.
Download MTT MS3704 Slim Plug-In High-Level Signal Conditioner information here
Spec Sheet: MTT MS3704 Spec Sheet
Manual: MTT MS3704 Manual
