The MTT MS3010 is a terminal block type potentiometer transmitter that converts a potentiometer (resistance) signal into a standard, isolated DC output. It accepts an input resistance range of 100Ω to 999Ω, or 1kΩ to 10kΩ total resistance, using a measuring voltage of 0.5V (100-999Ω) or 5V (1-10kΩ). Lead wire resistance is tolerated up to 10% or less of total resistance per wire.
Output is DC current (0~20mA, 4~20mA) or DC voltage (±10V to 10V range), so it can match what your PLC or DCS accepts. Zero is adjustable over approximately 0-30% of total resistance, and span over approximately 70-100%, with accuracy better than ±0.2% of span at 25°C±5°C and temperature coefficient of ±0.2% of span per 10°C change. Response time is 170ms max (0 to 90%).
There is 3-way isolation between input, output, and power, with CMRR of 100dB min (500V AC, 50/60Hz) and insulation resistance of 100MΩ min at 500V DC. Dielectric strength is 1500V AC for 1 minute.
Power supply is 24V DC (±10%) or 12V DC (±20%), drawing 50-70mA (24V) or 20-30mA (12V). The unit mounts on DIN rail with M3.5 screw terminals, in an ABS resin (UL 94V-0) enclosure measuring W25.0 × H94.0 × D40.0mm and weighing under 90g.
| Input Resistance Range | 100Ω to 999Ω, or 1kΩ to 10kΩ total resistance |
| Measuring Voltage | 0.5V (100-999Ω) or 5V (1-10kΩ) |
| Lead Wire Resistance | 10% or less of total resistance per wire |
| Output Signal | DC current (0-20mA, 4-20mA) or DC voltage (±10V to 10V range) |
| Zero Adjustment Range | Approx. 0-30% of total resistance |
| Span Adjustment Range | Approx. 70-100% of total resistance |
| Accuracy | Better than ±0.2% of span (at 25°C±5°C) |
| Response Time | 170ms max. (0 to 90%) |
| Temperature Coefficient | ±0.2% of span per 10°C change |
| CMRR | 100dB min. (500V AC, 50/60Hz) |
| Power Supply | 24V DC (±10%) or 12V DC (±20%) |
| Power Consumption | 50-70mA max. (24V), 20-30mA max. (12V) |
| Isolation | 3-way isolation between input, output, and power |
| Insulation Resistance | 100MΩ min. (@ 500V DC) |
| Dielectric Strength | 1500V AC for 1 minute |
| Enclosure / Mounting | ABS resin (UL 94V-0), DIN rail mounting, M3.5 screw terminal |
| Dimensions | W25.0 × H94.0 × D40.0 mm |
| Weight | 90g max. |
| Operating Temperature | -5 to 55°C, 5-90% RH non-condensing |
| Storage Temperature | -10 to 60°C |
Frequently asked questions
What is the MS3010 used for?
It converts the changing resistance from a potentiometric position or level sensor into a clean, standard 4 to 20mA or voltage signal that a PLC, DCS, or data logger can read directly.
Can the MS3010 be used with a level float switch?
Yes, level floats and similar sensors that output a resistance signal are one of the most common applications for this converter.
Why not just read the potentiometer’s resistance directly at the PLC?
Over long cable runs, the lead wire’s own resistance adds error to the reading. Converting to a current or voltage signal right at the sensor avoids that, and also lets the signal travel further without degrading.
Does the MS3010 need a separate power supply?
Yes, it runs on 24V DC or 12V DC and is not loop-powered.
Download MTT MS3010 Terminal Block Type Potentiometer Transmitter information here
Datasheet: MTT MS3010 Spec Sheet (PDF)
Manual: MTT MS3000 Series User’s Manual (PDF)
