Datasheet PR515x541

I/O modules and communication

Issued 3 November 2026

PT100 temperature via Wi-Fi to your dashboard (MQTT), with OLED display

Article number PR515x541

PR515 module in horizontal DIN rail enclosure, front three-quarter view, with screw terminals and USB-C port

The PR515x541 measures the temperature with a PT100 sensor in a 2-, 3- or 4-wire connection and sends the value via Wi-Fi using the MQTT protocol to a server (broker). There you show the temperature in a dashboard or have it trigger a notification, for example for a cold store that gets too warm. The Wi-Fi network and the server are set up through the built-in hotspot; the OLED display shows the temperature and the connection status.

Price on request. Supplied in series, from 10 units per item. Not in stock? Then we build your series. One or a few units only as a trial, for a company with a series in sight.

Specifications

Supply12 and 24 V DC, operating range 11 to 30 V DC
InputPT100, 2-, 3- or 4-wire
Measuring rangeFor example −50 to +150 °C
OutputWi-Fi with MQTT to a server of your choice
IsolationNot galvanically isolated; isolated version as an option
SetupOLED display with UP, DOWN and OK buttons
CommunicationWi-Fi network, server and send interval set through the built-in hotspot
USBUSB-C for software updates and reading the status
Wi-FiBuilt-in hotspot for software updates
MountingDIN rail, horizontal enclosure
Internally fitted withPR181T23

Setup

  1. Connect the supply, the PT100 according to the wiring diagram supplied with the module.
  2. Switch on the Wi-Fi hotspot on the display, connect with a phone or laptop and enter your Wi-Fi network and the MQTT server details.
  3. Check on the display that the connection is made and that the temperature arrives in your dashboard.