The MTT MS3107 is a terminal block type distributor with two independent, isolated outputs. It powers a 2-wire transmitter loop and distributes the signal to two separate receiving devices at once. It accepts a 4~20mA DC input from a 2-wire transmitter, with 250Ω input resistance, and supplies loop power at 25V typical at 0% input and 18V typical at 100% input (25mA max transmitter current).
Output 1 and output 2 are independently selectable as current (0~20mA) or voltage (10mV-10V) – useful when one transmitter signal needs to feed a PLC and a second, separate signal needs to feed a recorder or indicator at the same time, without a separate loop. Zero and span are each adjustable by about ±5% of span, with accuracy better than ±0.1% of span at 25°C±5°C and temperature effect better than ±0.2% of span per 10°C change. Response time is 85ms max (0 to 90%), with CMRR of 100dB min (500V AC, 50/60Hz).
There is 4-way isolation between input, output 1, output 2, and power, with dielectric strength of 2000V AC for 1 minute and insulation resistance of 100MΩ min at 500V DC.
Power supply is flexible: 100-240V AC, 24V DC, 110V DC, or 12V DC, drawing 9.0VA (AC), 2.4W (24V DC), 3.5W (110V DC), or 2.4W (12V DC). The unit mounts on DIN rail with M3.5 screw terminals, measuring W49.8 × H102.0 × D40.0mm and weighing under 140g.
| Input Signal | 4-20mA DC from 2-wire transmitter |
| Input Resistance | 250Ω |
| Transmitter Power Supply Output | 25V typical at 0% input, 18V typical at 100% input; 25mA max. transmitter current |
| Output 1 & 2 | Selectable current (0-20mA) or voltage (10mV-10V), independently configurable |
| Zero / Span Adjustment | Approx. ±5% of span each |
| Accuracy | Better than ±0.1% of span (at 25°C±5°C) |
| Response Time | 85ms max. (0 to 90%) |
| Temperature Effect | Better than ±0.2% of span per 10°C change |
| CMRR | 100dB min. (500V AC, 50/60Hz) |
| Isolation | 4-way isolation between input, output 1, output 2, and power |
| Power Supply | 100-240V AC, 24V DC, 110V DC, or 12V DC |
| Power Consumption | 9.0VA (AC), 2.4W (24V DC), 3.5W (110V DC), 2.4W (12V DC) |
| Insulation Resistance | 100MΩ min. (@ 500V DC) |
| Dielectric Strength | 2000V AC for 1 minute |
| 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 MS3107 used for?
It powers a 2-wire, 4-20mA transmitter and converts that signal into two independent, isolated DC outputs, so one field transmitter can feed two separate systems — for example a control loop and a recorder or alarm.
Can the MS3107 be used with AC power instead of 24V DC?
Yes. The MS3107 accepts 100-240V AC, 24V DC, 12V DC, or 110V DC, so it can be powered directly from panels without a dedicated 24V DC supply.
What’s the difference between the MS3107 and the MS3007?
The MS3107 gives two independent isolated outputs from one transmitter input and can run on AC or DC power. The MS3007 is a single-output distributor powered only by 24V DC. Choose the MS3107 when the same transmitter signal needs to feed two separate devices, or when only AC mains power is available at the panel.
Does the MS3107 still power the transmitter, or is it just an isolator?
It does both — it can power a 2-wire transmitter directly, or be used purely as an isolator and signal splitter on an existing 4-20mA loop if the transmitter already has its own power source.
Download MTT MS3107 Terminal Block Type Distributor with Isolated Dual Output information here
Datasheet: MTT_SpecSheet_MS3107_Rev210_E
Manual: MTT_Manual_MS3107_Rev170_E
