This is the operating manual for an electronic pressure switch
This operating manual describes the DS 4XX electronic pressure switch series (DS 400, DS 400 P, DS 401, DS 401 P). It outlines the intended use for absolute, vacuum and over‑pressure measurement, safety warnings, liability limits and the required qualifications for installation and operation.
The document covers mechanical mounting (DIN 3852, EN 837, NPT, dairy pipe, Clamp/Varivent®), electrical connection (M12×1 5‑pin connector, 2‑wire and 3‑wire wiring diagrams), initial start‑up, menu‑driven configuration of analog output, hysteresis/compare modes, password protection, maintenance, service/repair and disposal procedures.
| Pressure range | 0 – 2.5 bar |
|---|---|
| Supply voltage | 18‑41 VDC |
| Output current | 4‑20 mA |
| Display | 4‑digit LED display |
| Electrical connector | M12×1 5‑pin (DIN 47100) |
| Mounting standard | DIN 3852 |
| O‑ring for oxygen up to 50 bar | V747‑75 (BAM‑approved) |
Use the ZP and EP menus to set the zero‑point and end‑point values; the analogue output (4‑20 mA or 0‑20 mA) will follow the configured pressure range.
The default password is "0005"; it can be changed in menu 4.
Use O‑rings type V747‑75, which are BAM‑approved for oxygen service up to 50 bar.