The MTT MS3737 is a slim plug-in distributor that powers a 2-wire loop transmitter and splits its 4-20mA signal into two usable outputs, a voltage output and a current output, without isolating the input and output circuits from each other. Keeping input and output on a common path lets the unit stay compact and cost-effective, which suits installations where a full three-way isolated distributor is more than the application really needs.
Input, output, and power stay isolated from each other at the power and ground level, so it still keeps the loop clean from supply-side noise even without full channel-to-channel isolation. Like the rest of the plug-in transmitter series, the MS3737 clips into its own socket base for fast swap-out during calibration or maintenance without disturbing the field wiring, and it is available in AC, 24V DC, or high-voltage DC powered versions to fit an existing panel.
| Input | 4-20mA DC from a 2-wire transmitter |
| Input Resistance | 250Ω |
| Output 1 | 1-5V DC, 250kΩ min. load |
| Output 2 | 4-20mA DC, 10Ω max. load (up to 260Ω with Output 1 terminals shorted) |
| Isolation | 3-way isolation between input/output 1/output 2 as a group, power, and ground (input and output not isolated from each other) |
| Insulation Resistance | 100MΩ min. at 500V DC |
| Accuracy | Better than ±0.1% |
| Temperature Effect | ±0.03% per 10°C change |
| Power Supply | 100-240V AC (50-60Hz), 24V DC (±10%), or 100-240V DC |
| Power Consumption | 1.5W to 5.8W max., depending on supply |
| Dimensions | W29 × H86 × D125mm |
| Weight | 110g max. (main unit), plus 80g max. socket |
| Mounting | Wall or DIN rail mounting |
| Terminals | M3.5 screw terminals |
| Operating Temperature | -5 to 55°C |
| Operating Humidity | 5 to 90% RH, non-condensing |
Frequently Asked Questions
What is the MTT MS3737 used for?
It powers a 2-wire 4-20mA loop transmitter and splits its signal into two outputs — a 1-5V voltage output and a 4-20mA current output — so one transmitter can feed two different receiving devices without a separate splitter.
What does “non-isolated” mean for this model, and does it matter?
The input and the two outputs share a common circuit path rather than being fully isolated from each other, though all of them stay isolated from the power supply and ground. That keeps the unit compact and cost-effective for applications that don’t need full channel-to-channel isolation.
When should I choose the MS3737 instead of a fully isolated distributor?
If your application doesn’t have a ground loop risk between the transmitter and the receiving instruments, the MS3737’s non-isolated design is a simpler, more economical option. If you need guaranteed isolation between input and output circuits, ask us about a fully isolated distributor model instead.
What power supply options are available?
It’s available in 100-240V AC, 24V DC, or 100-240V DC powered versions, so tell us your available supply and we can confirm the right version.
How do I know if the MS3737 is right for my application?
Send us your transmitter’s signal type and the two output signals your receiving equipment needs, along with whether isolation between input and output is a requirement, and we can confirm before you order.
Download MTT MS3737 Slim Plug-In Distributor (Non-Isolation between Input and Output) information here
Spec Sheet: SpecSheet1_MS3737_Rev260_E.pdf
Manual: Manual1_MS3737_Rev170_E.pdf
