MTT MS3102 Terminal Block Type RTD Temperature Transmitter

We had an enquiry from a customer running a single RTD sensor on a critical vessel, who wanted the same temperature reading to go to both their DCS and a separate independent high-temperature alarm system, without one signal path affecting the other.

This looks simple, but wiring one RTD output to feed two separate systems isn’t as simple as splitting the wires. Loading the signal down or letting the two receiving systems share a ground reference defeats the purpose of having an independent alarm path in the first place — if the readings interact, you’ve lost the independence you were trying to build in.

For this, we would normally recommend the MTT MS3102, a terminal block type RTD transmitter with isolated dual output. It converts a Pt or Ni resistance signal into two fully independent, isolated outputs from a single unit, so a control loop and a separate alarm or monitoring system can both read the same measurement without interacting. It accepts a choice of AC or DC power, so it fits panels without a dedicated 24V DC supply, and lead-wire compensation keeps the reading accurate over longer cable runs. It mounts on DIN rail right where the RTD wiring terminates, with front-accessible zero and span trimmers for on-site calibration.

Before we quote, we would normally check the RTD type and its temperature range, 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.