We received an enquiry from a customer with a potentiometric position sensor — a valve position feedback, damper actuator, or float-type level sensor — whose single resistance signal needed to go to both a PLC and a separate local indicator. Splitting a potentiometer’s wiper signal to two receivers isn’t straightforward; each receiver loads the circuit and can throw off the reading on the other.
The MTT MS3110 solves this by measuring the potentiometer’s resistance directly and re-issuing it as two completely independent, isolated DC outputs. Input, both outputs, and power are all isolated from each other, so neither output disturbs the sensor reading or the other connected device. Independent zero and span adjustments on each output let a technician match the working resistance range to the actual sensor travel without touching the sensor itself.
In actual application, panel power isn’t always 24V DC. The MS3110 accepts 100-240V AC mains, 24V DC, or 110V DC, so it fits into panels without a dedicated low-voltage bus. The compact DIN-rail housing mounts right where the potentiometer wiring terminates.
Before we quote, we would normally check: the potentiometer’s resistance range, the output ranges needed on Output 1 and Output 2, the panel’s available power supply (AC or DC, and voltage), and DIN-rail space (it’s a compact 49.8mm wide unit). Send us these details and we can confirm the right variant before you order. Hope this helps.
| Input Resistance Range | 0-100Ω to 0-10kΩ |
| Measuring Voltage | Approx. 0.5V |
| Lead Wire Resistance | 10% or less of total resistance per wire |
| Output 1 & 2 | Current (0-20mA, 4-20mA) or voltage (10mV-20V), independently configurable |
| Zero Adjustment | Output 1: approx. 0-30% of total resistance; Output 2: approx. ±5% of span |
| Span Adjustment | Output 1: approx. 70-100% of total resistance; Output 2: approx. ±5% of span |
| Accuracy | Better than ±0.2% of span (at 25°C±5°C) |
| Response Time | 170ms max. (0 to 90%); 10ms max. with /K option |
| Temperature Effect | Better than ±0.2% of span per 10°C change |
| CMRR | 100dB min. (500V AC, 50/60Hz) |
| Power Supply | 100-240V AC, 24V DC, or 110V DC |
| Power Consumption | 7.0VA (AC), 1.5W (24V DC), 2.5W (110V DC) |
| Isolation | 5-way isolation between input, output 1, output 2, power, and ground |
| Insulation Resistance | 100MΩ min. (@ 500V DC) |
| Dielectric Strength | 2000V AC for 1 minute (500V AC between outputs) |
| Enclosure / Mounting | ABS resin (UL 94V-0), DIN rail mounting, M3.5 screw terminal |
| Dimensions | W49.8 × H102.0 × D40.0 mm |
| Weight | 140g max. |
| Operating Temperature | -5 to 55°C, 5-90% RH non-condensing |
| Storage Temperature | -10 to 60°C |
Frequently Asked Questions
What is the MS3110 used for?
It converts a potentiometric sensor’s changing resistance — such as a valve position feedback or float-type level sensor — into two independent, isolated DC outputs, so one measurement can feed two separate systems.
Can the MS3110 be used with AC power instead of 24V DC?
Yes. The MS3110 accepts 100-240V AC, 24V DC, or 110V DC, so it can be powered directly from panels that don’t have a dedicated 24V DC supply.
What’s the difference between the MS3110 and the MS3010?
The MS3110 gives two independent isolated outputs from one potentiometer input and can run on AC or DC power. The MS3010 is a single-output transmitter powered only by 24V or 12V DC. Choose the MS3110 when the same position or level reading needs to feed two separate devices, or when only AC mains power is available at the panel.
How do I know which MS3110 configuration I need?
It depends on your potentiometer’s resistance range, the output ranges needed on Output 1 and Output 2, and your available power supply. We’re happy to confirm the right configuration before you order.
Download MTT MS3110 Terminal Block Type Potentiometer Transmitter information here
Datasheet: MTT_SpecSheet_MS3110_Rev200_E
Manual: MTT_Manual_MS3110_Rev160_E
