Datasheet PR515x604

Signal converters and isolating amplifiers

Issued 4 November 2026

Resistance to relay (level, NTC), adjustable limit, with OLED display

Article number PR515x604

PR515 module in horizontal DIN rail enclosure, front view with pluggable screw terminals

The PR515x604 measures a resistance and switches a relay contact at a set limit, with hysteresis. This lets you use a tank float with resistance output as a level switch, or an NTC as a thermostat, without an extra control system. The limit is taught by bringing the sender to the required position, or set on the OLED display.

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
InputResistance, for example a tank float or NTC
OutputRelay contact (normally open)
IsolationNot galvanically isolated
SetupOLED display with UP, DOWN and OK buttons
Switching pointLimit and hysteresis adjustable; switch on above or below the limit
USBUSB-C for software updates and reading the status
Wi-FiBuilt-in hotspot for software updates
MountingDIN rail, horizontal enclosure
Internally fitted withPR181T55

Setup

  1. Connect the supply, the resistance sender and the relay contact according to the wiring diagram supplied with the module.
  2. Bring the sender to the position at which the relay must switch and teach that value on the display, or set the resistance directly.
  3. Set the hysteresis, choose whether the relay switches on above or below the limit and store with SAVE.