MTT MS3101 Terminal Block Type Thermocouple Temperature Transmitter

We had an enquiry from a customer who needed to send a thermocouple reading to both their main PLC and a separate standalone chart recorder, from a single measurement point, without disturbing either device’s isolation.

This looks simple, but splitting a signal to feed two separate devices isn’t as simple as wiring the same output to both terminals. Doing that loads down the signal and can introduce interaction between the two receiving devices, especially if they’re not grounded at the same point. And where the panel only has AC mains available rather than a clean 24V DC bus, many DC-only isolators simply won’t fit the installation.

For this, we would normally recommend the MTT MS3101, a terminal block type thermocouple temperature transmitter with isolated dual output. It converts the thermocouple signal into two fully independent, isolated outputs from a single unit, so you can feed a control system and a separate recorder or alarm module at the same time without one affecting the other. Five-way isolation between the input, both outputs, power, and ground keeps every downstream device electrically separated. It also accepts a choice of AC or DC power, which makes it easier to fit into panels that don’t already have a 24V DC bus available. It mounts on DIN rail right where the thermocouple wiring terminates, with field-adjustable zero and span for on-site calibration.

Before we quote, we would normally check the thermocouple type, the output range needed on each of the two outputs, and the power supply available at the panel. Hope this helps — send us your details and we can confirm the right model.