Commissioning the specified ST 04 assembly
Pepperl+Fuchs ST 04 is a portable sensor tester used to test industrial sensor outputs during maintenance. This service brief separates the confirmed identity of ST 04 from the installation choices that must be checked on site. The shared Pepperl+Fuchs main image is an illustrative category montage, not an exact photograph of ST 04. Use the complete designation on the fitted label when enquiring or replacing the part.
Technical parameters at a glance
| Technical item | Verified value / selection note |
|---|---|
| Exact model | ST 04 |
| Product role | portable sensor tester |
| Role | Sensor tester |
| Compatible output | PNP, NPN or push-pull sensors |
| Field terminals | 4 quick-action clamps |
| Supply | 3 AA batteries; optional 12 V DC supply |
| Variant check | Confirm the complete designation and current manufacturer documentation before replacement. |
Application snapshot
In operation, ST 04 is intended to test industrial sensor outputs during maintenance. Establish the real input condition, the expected output response and the acceptance limit. Where an accessory, receiver, host card, reflector or magnet is required, include that matched part in the bill of materials. Do not infer that the picture or a neighbouring model code establishes compatibility for ST 04.
Service hold points
Before ordering ST 04, photograph the nameplate and document what is connected on each side of the device. Check supply, signal or mechanical interface, mounting, environmental exposure and the receiving controller. The table is a compact technical reference for ST 04; a similar printed string can denote another function, rating or certification. Retain any parameter backup and the current drawing with the maintenance record.
At installation, Connect the sensor by its actual pinout and prove PNP/NPN state changes. Confirm power is isolated where required and compare the connector or terminals against the current manufacturer documentation for ST 04. Verify safe-area and hazardous-area boundaries where applicable; the exact certificate and site wiring govern the final decision. Leave enough clearance for the fitted cable and normal service access.
Acceptance record
Commission ST 04 with an observable, known condition rather than only checking an indicator lamp. Record at least two input states and their controller responses, then test the edge of the real working range where practical. If ST 04 is part of a safety or Ex installation, use the site's approved proof-test procedure and exact approval documents. Save settings, photos and measured results so a later replacement can be compared reliably.
Procurement detail
A useful quotation request for ST 04 includes the full code, quantity, site function, connection type, any mating accessory and required approval. Ask the supplier to confirm every changed suffix on a proposed alternative. This page does not declare that other visually similar codes are interchangeable with ST 04; each requires its own data and fit review.
Visually related codes
The following model strings resemble ST 04 in print. They are collected for search and stock recognition only; electrical and mechanical functions can differ. Verify every complete designation independently.
No additional same-pattern designation is grouped with ST 04 in this selection.
Handover note
Keep the final ST 04 nameplate photo, fit check and test record with the machine file. Re-check the exact model whenever the host, process or installation environment changes.
