Keyence · photoelectric sensor
PR-F51C3PD is a Keyence photoelectric sensor with Sensing distance Sn 0.6 m; Output type (PNP/NPN) PNP; Supply voltage 10...30 V DC (IEC 60947-5-2). It is used in conveyor object detection, machine guarding, position feedback where the installed unit is matched to the original catalog number and a compact, documented part is required.
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Sensing distance Sn0.6 m
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Output type (PNP/NPN)PNP
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Supply voltage10...30 V DC (IEC 60947-5-2)
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Enclosure ratingIP67 (IEC 60529)
Specifications
| Electrical |
| Supply voltage |
10...30 V DC (IEC 60947-5-2) |
| I/O and communication |
| Sensing distance Sn |
0.6 m |
| Response time |
<= 1000 Hz switching frequency |
| Output type (PNP/NPN) |
PNP |
| Mechanical |
| Weight |
Approx. 20 g |
| Enclosure rating |
IP67 (IEC 60529) |
| Environment and compliance |
| Operating temperature |
-25...+70 °C (IEC 60068-2-1) |
| Storage temperature |
-25 to +75 °C -13 to 167 °F |
| Certifications |
CE, cULus |
| Humidity |
35 to 85 % RH (No condensation) |
Values follow the Keyence photoelectric sensor specification for this catalog number; parameters not confirmed for this variant are omitted rather than estimated.
Model comparison in the same family
| Keyence photoelectric sensor variants |
| Catalog number |
Output type (PNP/NPN) |
Sensing distance Sn |
Supply voltage |
|
PR-F51C3PD (this page) |
PNP |
0.6 m |
10...30 V DC (IEC 60947-5-2) |
| PR-F51C3PL |
PNP |
0.6 m |
10...30 V DC (IEC 60947-5-2) |
| PR-F51CP |
PNP |
0.6 m |
10...30 V DC (IEC 60947-5-2) |
| PR-F51N1 |
NPN |
0.6 m |
10...30 V DC (IEC 60947-5-2) |
Before selecting an alternative, confirm its dimensions, terminals and installation requirements in the manufacturer documentation.
Where it sits in the control system
The PR-F51C3PD is the device-level element in a Keyence photoelectric sensor installation. It receives the field signals and control supply listed above — 10...30 V DC (IEC 60947-5-2) — and switches or conditions the load within the the rated ratings shown in the Specifications table. Wiring and protective devices are sized to those same numbers, not to a generic assumption.
Typical installations place it in conveyor object detection, machine guarding, position feedback, where the unit is matched to the original catalog number and the enclosure provides standard panel or DIN-rail support. Record the catalog number and revision from the nameplate of the installed unit before specifying a like-for-like spare.
Selection notes for Keyence PR-F51C3PD
Keyence PR-F51C3PD — Sensor or detector for object detection, distance measurement and status feedback on production lines. The figures below are taken from the specification table on this page for catalog number PR-F51C3PD; confirm the installed unit's part number and revision so the replacement matches both electrically and mechanically.
- Supply voltage: 10...30 V DC (IEC 60947-5-2) — Check this value against the nameplate of the installed unit before ordering.
- Certifications: CE, cULus — Match it to the existing panel and upstream protection.
- Humidity: 35 to 85 % RH (No condensation) — Record it with the other nameplate data when sourcing a replacement.
- Storage temperature: -25 to +75 °C -13 to 167 °F — Confirm the revision of the installed unit before a like-for-like replacement.
Cross-check the ratings above with the installed device before confirming the order.
Common questions about PR-F51C3PD
Q.Before ordering PR-F51C3PD, which weight entry should be checked?
The weight entry quoted above is Approx. 20 g. Use the value as the reference when sourcing a current-production equivalent.
Q.Where can I find the certifications data for PR-F51C3PD?
It is listed in the specification table for Keyence PR-F51C3PD as CE, cULus. Check the revision of the installed unit if the catalog number has been superseded.
Q.For PR-F51C3PD, what does the specification table state about storage temperature?
The specification table lists storage temperature = -25 to +75 °C -13 to 167 °F for Keyence PR-F51C3PD. Compare it with the nameplate of the installed unit before ordering.
Q.How do I confirm compatibility of PR-F51C3PD before ordering?
Match the catalog number PR-F51C3PD and the specification values listed above against the installed unit, then confirm the firmware or hardware revision where a revision-sensitive part is involved.
Q.Can the PR-F51C3PD replace the unit currently installed in my panel?
Compare catalog number PR-F51C3PD and the ratings above with the nameplate of the installed device. A current-production equivalent is selected by function and electrical rating, not by the label alone.