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Keyence · photoelectric sensor
PR-M51C3PD is a Keyence photoelectric sensor with Sensing distance Sn 1.2 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.
| Electrical | |
| Supply voltage | 10...30 V DC (IEC 60947-5-2) |
|---|---|
| I/O and communication | |
| Sensing distance Sn | 1.2 m |
| Response time | <= 1000 Hz switching frequency |
| Output type (PNP/NPN) | PNP |
| Mechanical | |
| Weight | Approx. 26 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.
| Keyence photoelectric sensor variants | |||
| Catalog number | Output type (PNP/NPN) | Sensing distance Sn | Supply voltage |
|---|---|---|---|
| PR-M51C3PD (this page) | PNP | 1.2 m | 10...30 V DC (IEC 60947-5-2) |
| PR-M51C3PL | PNP | 1.2 m | 10...30 V DC (IEC 60947-5-2) |
| PR-M51CN | NPN | 1.2 m | 10...30 V DC (IEC 60947-5-2) |
| PR-M51CP | PNP | 1.2 m | 10...30 V DC (IEC 60947-5-2) |
Before selecting an alternative, confirm its dimensions, terminals and installation requirements in the manufacturer documentation.
The PR-M51C3PD 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.
Keyence PR-M51C3PD — 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-M51C3PD; verify the catalog number against your bill of materials before requesting a quotation.
For a discontinued unit, match function and electrical ratings rather than the label alone.
Q.For PR-M51C3PD, what does the specification table state about certifications?
The specification table lists certifications = CE, cULus for Keyence PR-M51C3PD. Compare it with the nameplate of the installed unit before ordering.
Q.Which value is published under response time for catalog number PR-M51C3PD?
For PR-M51C3PD, response time is given as <= 1000 Hz switching frequency. Confirm this figure against the unit currently in the panel.
Q.Before ordering PR-M51C3PD, which enclosure rating entry should be checked?
The enclosure rating entry quoted above is IP67 (IEC 60529). Use the value as the reference when sourcing a current-production equivalent.
Q.How do I confirm compatibility of PR-M51C3PD before ordering?
Match the catalog number PR-M51C3PD 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-M51C3PD replace the unit currently installed in my panel?
Compare catalog number PR-M51C3PD 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.
Standard (US & Canada, tracked courier): delivered in 5–8 business days. In-stock items are processed within 2–4 business days. USD 25 flat rate on orders under $500.00; free on orders of $500.00 and above.
Express (DHL Express / FedEx International): upgraded expedited delivery in 2–4 business days. The Express surcharge is calculated at checkout based on destination and order weight.
Non-Stock / On-Order items ship on request: dispatch time is confirmed before your order — see our Shipping Policy. Shipping charges and available services are displayed at checkout. See the Shipping Policy for details.
Every product is covered by a 12-month seller warranty provided by SHLY-PLC, effective from the date of delivery, against defects in materials and workmanship under normal use.
This warranty does not cover damage from misuse, improper installation, power surges, neglect, unauthorized repair, or normal wear and tear. See our Return Policy for warranty-claim instructions.
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