Datasheet PR515x513

I/O modules and communication

Issued 3 November 2026

Current transformer (CT) to Modbus RTU, three inputs, with OLED display

Article number PR515x513

PR515 module in DIN rail enclosure, angled top view: OLED display, push buttons, USB-C port and screw terminals

The PR515x513 measures the current per phase or per group through up to three current transformers (1 A or 5 A, true RMS) and provides the values as Modbus RTU registers on an RS485 bus. The current transformers measure contactlessly, so the existing wiring does not need to be modified. The current transformer type, the Modbus address and the baud rate are set on the OLED display, which also shows the current per input.

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
InputThree inputs for current transformers (CT) of 1 A or 5 A AC, true RMS
OutputModbus RTU over RS485; current per input as a register
IsolationCurrent transformers measure contactlessly and with galvanic isolation; RS485 not isolated
SetupOLED display with UP, DOWN and OK buttons
CommunicationModbus address and baud rate adjustable on the display
USBUSB-C for software updates and reading the status
Wi-FiBuilt-in hotspot for software updates
MountingDIN rail, horizontal enclosure
Internally fitted with3× PR181T57

Setup

  1. Connect the supply, the current transformers and the RS485 bus (A and B) according to the wiring diagram supplied with the module.
  2. On the display, select the current transformer type (1 A or 5 A) and set the Modbus address and the baud rate.
  3. Store with SAVE and read the currents with your PLC or energy monitor; the register list is supplied with the module.