Datasheet PR515x540

I/O modules and communication

Issued 3 November 2026

Four analogue inputs and relay via Wi-Fi to your dashboard (MQTT), with OLED display

Article number PR515x540

PR515 module board from above: OLED display, UP, OK and DWN buttons, relay, USB-C port and terminals 1 to 22

The PR515x540 measures four analogue signals and sends the values via Wi-Fi using the MQTT protocol to a server (broker). There you show them in a dashboard, store them or have them trigger a notification. The relay is switched remotely over the same channel. Each input is 0-10 V or 4-20 mA, chosen when ordering. The Wi-Fi network and the server are set up through the built-in hotspot; the OLED display shows the values 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
InputFour analogue inputs, 0-10 V or 4-20 mA per input (chosen when ordering)
OutputWi-Fi with MQTT to a server of your choice; relay contact (normally open), remotely switchable
IsolationNot galvanically isolated
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

Setup

  1. Connect the supply, the analogue signals and the relay contact 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 values arrive in your dashboard.