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

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

Article number PR515x604

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.

Supply 12 and 24 V DC, operating range 11 to 30 V DC
Input resistance, for example a tank float or NTC
Output relay contact (normally open)

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.

Request price and lead time WhatsApp Willem

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	Resistance, for example a tank float or NTC
Output	Relay contact (normally open)
Isolation	Not galvanically isolated
Setup	OLED display with UP, DOWN and OK buttons
Switching point	Limit and hysteresis adjustable; switch on above or below the limit
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	PR181T55

Printable datasheet

Setup

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

Application

Switching a pump or alarm on the level of a tank float
Using an NTC as a simple thermostat for a fan or heater
Using an existing fuel or water sender for a low-level alarm

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