Matching the target flag and receiving NAMUR interface to the requested slot-sensor designation Pepperl Fuchs SJ3.5-SN
Pepperl Fuchs SJ3.5-SN uses a decimal point in the supplied list; the manufacturer publishes the corresponding family notation as SJ3,5-SN. Preserve the requested wording while confirming the label notation on the offered unit. This compact slot-sensor application depends on the target passing through a defined opening and on the receiving amplifier interpreting the sensor current correctly.
Reference image for Pepperl Fuchs SJ3.5-SN; the shared illustration does not establish the delivered options or included accessories.
Slot sensor and notation checks
| Review item | Documented value or confirmation needed |
|---|---|
| Requested wording | Pepperl Fuchs SJ3.5-SN |
| Manufacturer notation to reconcile | SJ3,5-SN |
| Slot width | 3.5 mm |
| Output type | NAMUR with safety function |
| Switching function | Normally closed |
| Lateral immersion | 5–7 mm, typically 6 mm, in the manufacturer data |
| Application limits | Use exact instructions and the approved receiving interface |
Target geometry and exact model notation
For Pepperl Fuchs SJ3.5-SN, obtain the target-flag drawing and show how it enters the slot. Include thickness, alignment and the full movement envelope. Mechanical clearance and the specified sensing position are separate checks. A flag that fits inside the opening is not automatically located correctly for detection, so the installation review should use the manufacturer's target and immersion information. The purchase record for Pepperl Fuchs SJ3.5-SN should retain the supplied model while noting the manufacturer's comma notation. Ask the supplier to reconcile the label and order wording explicitly. This is a notation check, not permission to ignore other suffix differences. Related references such as SJ3,5-N or an added special suffix must still be reviewed as distinct identities.
Use a compatible NAMUR receiving circuit
- The output of Pepperl Fuchs SJ3.5-SN should be connected only through the arrangement specified for the application.
- Identify the receiving switch amplifier and preserve its complete reference.
- A NAMUR sensor is not equivalent to an ordinary powered transistor-output switch.
- The electrical comparison needs the sensor and receiving interface together, especially where the existing circuit has a defined diagnostic or safety-related function.
A component rating does not establish the whole function
When Pepperl Fuchs SJ3.5-SN is part of a safety-related application, use the site's approved design and the applicable manufacturer instructions to assess the replacement. The catalogue's component capability does not by itself establish the achieved performance of the complete function. Keep the target mechanism, receiving equipment and required verification procedure linked in the maintenance record. Do not approve a different sensor from appearance alone.
Protect the small mechanical arrangement
Record how Pepperl Fuchs SJ3.5-SN and its leads are supported in the machine. The sensor may be compact, but its mounting and cable routing still need to tolerate the actual movement and access conditions.
If the original fault followed mechanical disturbance, inspect the flag and support arrangement as part of the repair scope. Purchasing should identify any required mounting pieces instead of assuming only the sensor needs attention.
Close the order with an identifiable unit
Request the actual label and lead arrangement for Pepperl Fuchs SJ3.5-SN, together with the applicable document set. At receipt, resolve the dot/comma notation and confirm that the requested suffix has been preserved. The site's checks should relate the flag position to the intended receiving-system state. Retain those results with the final model identification for future exact-spare purchasing.
Supporting document: product information used for this selection review.
