The Datasensor SR21 Series slot sensor manual provides specifications, installation steps, setting procedures, error messages, and warranty details.
The SR21 Series is a slot sensor with bi‑colour LED indicators and M8 4‑pole connector, designed for detecting objects up to 1.5 mm thick. It operates from a 10‑30 VDC supply and is protected against polarity inversion, with an IP65 housing.
This manual covers technical data, mechanical dimensions, wiring connections, step‑by‑step sensor setting, interpretation of error LEDs, and warranty information. It also includes the declaration of conformity and environmental notes from Datasensor S.p.A.
| Power supply | 10 … 30 Vdc |
|---|---|
| Output current (max) | 100 mA |
| Response time (max) | 66 µs (SR21‑AH/AR/AV) |
| Switching frequency (max) | 7.5 kHz (SR21‑AH/AR/AV) |
| Operating temperature | 0 … 55 °C |
| Protection class | IP65 |
| Weight | 115 g |
A blinking red ERROR LED means the output is in protection mode due to a short circuit; removing the short re‑activates the output and the red LED turns off.
Datasensor provides an 18‑month warranty from the manufacturing date for defects, excluding damage from improper application.