Datasheet PR515x603

Signal converters and isolating amplifiers

Issued 3 November 2026

Speed or frequency monitor with relay, with OLED display

Article number PR515x603

PR515 module in horizontal DIN rail enclosure, front three-quarter view, with screw terminals and USB-C port

The PR515x603 measures the frequency of a pulse signal, for example from an inductive sensor on a shaft, and switches a relay contact when the speed goes above or below a set limit. This tells you when a conveyor, pump or fan stops or slips, or a motor runs too fast. A start-up delay prevents an alarm while starting. Limit, hysteresis, delay and the number of pulses per revolution are 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
InputPulse signal or frequency, for example from an inductive sensor; galvanically isolated
OutputRelay contact (normally open)
IsolationInput galvanically isolated with an optocoupler
SetupOLED display with UP, DOWN and OK buttons
Switching pointLimit, hysteresis and start-up delay adjustable; monitoring on maximum or minimum
USBUSB-C for software updates and reading the status
Wi-FiBuilt-in hotspot for software updates
MountingDIN rail, horizontal enclosure
Internally fitted withPR181s04

Setup

  1. Connect the supply, the pulse source and the relay contact according to the wiring diagram supplied with the module.
  2. On the display, set the number of pulses per revolution and choose monitoring on maximum or minimum.
  3. Set the limit, the hysteresis and the start-up delay and store with SAVE.