The MTT MS3707 is a slim plug-in distributor that both powers a 2-wire, 4-20mA field transmitter and takes its current signal, reproducing it as one or two galvanically isolated outputs for downstream equipment. By supplying the loop power itself, it removes the need for a separate transmitter power supply and keeps the receiving instruments electrically isolated from the field loop.
Where a dual-output configuration is used, both outputs stay isolated from each other, the input, and the power supply, letting one 2-wire transmitter feed a control loop and an independent monitoring or logging system at the same time. Front-accessible zero and span trimmers make on-site calibration quick, and like the rest of the plug-in transmitter range, the MS3707 clips into its own socket base so the unit can be swapped for calibration or replacement in seconds without disturbing the field wiring. Flexible AC or DC power plus wall or DIN rail mounting make it easy to fit into an existing panel.
| Input | 4-20mA DC from 2-wire transmitters |
| Input Resistance | 250Ω |
| Transmitter Power Supply | 26.4V typical at 0% input; 21.6V at 100% input |
| Output | 4-20mA DC or 0-20mA DC current; 0-10mV to 0-10V DC voltage ranges (single or isolated dual output) |
| Isolation | 4-way isolation between input, outputs, power, and ground |
| Insulation Resistance | 100MΩ minimum at 500V DC |
| Power Supply | 100-240V AC (6.5-7.5VA), 24V DC (2.1-2.4W), or 100-240V DC (7.2-8.4W) |
| Accuracy | Better than ±0.1% of span (at 25°C±5°C) |
| Response Time | 85ms maximum (0-90%) |
| CMRR | Minimum 100dB |
| Zero & Span Adjustment | Front-accessible trimmers |
| 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 |
Frequently Asked Questions
What is the MTT MS3707 used for?
It’s a distributor: it supplies loop power to a 2-wire, 4-20mA field transmitter and reproduces its signal as one or two galvanically isolated outputs, so you don’t need a separate transmitter power supply.
Why would I need isolated outputs from a transmitter signal?
Isolation breaks ground loops and protects downstream equipment from field-side electrical noise or faults, and lets you split one transmitter’s signal to feed two independent systems safely.
Can the MS3707 feed two separate systems from one transmitter?
Yes, in its dual-output configuration — both outputs are isolated from each other, the input, and the power supply, so one 2-wire transmitter can feed a control loop and a separate monitoring or logging system at the same time.
How is the MS3707 calibrated on site?
It has front-accessible zero and span trimmers, so on-site calibration or fine adjustment can be done without opening the unit or reprogramming anything.
How do I know if the MS3707 is the right distributor for my transmitter?
Send us your transmitter’s power requirement and the output signal your receiving equipment needs, and we’ll confirm compatibility before you order.
Download MTT MS3707 Slim Plug-In Distributor information here
Spec Sheet 1: MTT MS3707 Spec Sheet 1
Spec Sheet 2: MTT MS3707 Spec Sheet 2
Manual: MTT MS3707 Manual
