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

Thermocouple to Modbus RTU (RS485), with OLED display

Article number PR515x507

The PR515x507 measures the temperature with a type K thermocouple, with cold-junction compensation on the module, and provides the value as a Modbus RTU register on an RS485 bus. This lets a PLC or HMI read high temperatures as well, such as of exhaust gases or furnaces, without an analogue input. The Modbus address and baud rate are set on the OLED display.

Supply 12 and 24 V DC, operating range 11 to 30 V DC
Input type K thermocouple, with cold-junction compensation
Output modbus RTU over RS485; temperature as a register

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.

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Orders are placed by email with a purchase order. We supply businesses only.

Specifications

Specifications
Supply	12 and 24 V DC, operating range 11 to 30 V DC
Input	Type K thermocouple, with cold-junction compensation
Measuring range	For example 0 to 600 °C
Output	Modbus RTU over RS485; temperature as a register
Isolation	Not galvanically isolated; isolated version as an option
Setup	OLED display with UP, DOWN and OK buttons
Communication	Modbus address and baud rate adjustable on the display
USB	USB-C for software updates and reading the status
Wi-Fi	Built-in hotspot for software updates
Mounting	DIN rail, horizontal enclosure
Internally fitted with	PR181T21

Printable datasheet

Setup

Connect the supply, the thermocouple and the RS485 bus (A and B) according to the wiring diagram supplied with the module.
On the display, set the Modbus address and the baud rate.
Store with SAVE and read the temperature with your PLC or HMI; the register list is supplied with the module.

Application

Reading exhaust gas temperatures of engines or generators over RS485
Including furnace temperatures in a PLC or HMI without a thermocouple card
Connecting several thermocouples on one bus, each with its own address

PR515 series: controllers and converters with OLED display

The modules in the PR515 series have an OLED display and push buttons, so they can be set up without a computer and show the current values of inputs and outputs. They run on 12 and 24 V DC systems. Most versions can be extended on request, for example with an extra relay output, a PWM output, a bus connection (CAN bus or Modbus) or a different sensor input.

More about the PR515 series