The MTT MS3704SW is a slim plug-in high-level signal conditioner with switch-selectable 1-5V DC or 4-20mA DC input and output, letting the signal type be changed on site using switches on the unit itself rather than fixed at the factory by ordering code.
It delivers an isolated dual output, so one input signal can drive two separate downstream systems at the same time, with 4-way isolation between the input, Output 1, Output 2, and power keeping each circuit independent. Input resistance is 1MΩ minimum on the voltage input or 250Ω on the current input, and zero and span can be trimmed by approximately ±5% of span for on-site adjustment. Accuracy is better than ±0.1% of span at 25°C±5°C.
Power options cover 100-240V AC, 24V DC, or 100-240V DC. Like the rest of the plug-in transmitter range, the MS3704SW mounts on its own DIN-rail plug-in socket base, letting the unit be swapped for calibration or replacement in seconds without disturbing the field wiring.
| Input | 1-5V DC or 4-20mA DC, switch-selectable |
| Input Resistance | 1MΩ minimum (voltage); 250Ω (current) |
| Allowable Input | 30V DC max. continuous (voltage); 40mA DC max. continuous (current) |
| Output | 1-5V DC or 4-20mA DC, switch-selectable, isolated dual output |
| Zero & Span Adjustment | ±5% of span |
| Isolation | 4-way isolation between input, Output 1, Output 2, and power |
| Power Supply | 100-240V AC, 24V DC, or 100-240V DC |
| Accuracy | Better than ±0.1% of span (at 25°C±5°C) |
| Temperature Effect | ±0.2% of span per 10°C change |
| Response Time | 85ms maximum (0-90%) |
| CMRR | Minimum 100dB |
| Dielectric Strength | 2000V AC for one minute |
| Dimensions (W x H x D) | 29mm x 86mm x 125mm |
| Weight | Main unit 120g; socket 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 MS3704SW used for?
It takes a 1-5V DC or 4-20mA DC input signal and re-transmits it as an isolated dual output, so one field signal can drive two separate downstream systems — for example a PLC and a local indicator — at the same time.
How do I select between 1-5V and 4-20mA on the MS3704SW?
The signal type for both input and output is set using switches on the unit itself, so it can be configured or reconfigured on site without ordering a different fixed model.
What’s the difference between the MS3704SW and the MS3704IS?
Both offer selectable 1-5V/4-20mA signal conditioning, but the MS3704IS is fixed to a single output at the time of ordering by ordering code, while the MS3704SW gives an isolated dual output and lets the signal type be changed on site using its switches.
What’s the difference between the MS3704SW and the standard MS3704?
The standard MS3704 is a high-level DC current/voltage signal conditioner with a single output. The MS3704SW adds switch-selectable signal type and a second isolated output, so it can feed two systems from one input.
How do I know if I need the MS3704SW instead of another MS3704 variant?
If you need to feed the same input signal to two separate isolated outputs, or you want the flexibility to switch between 1-5V and 4-20mA on site rather than fixing it by ordering code, the MS3704SW is the right choice. Send us your input signal and how many downstream systems you need to feed and we can confirm.
Download MTT MS3704SW Slim Plug-In High-Level Signal Conditioner information here
Spec Sheet: MTT MS3704SW Spec Sheet
Manual: MTT MS3704SW Manual
