Genuine Panasonic FX-551 (Digital Fiber Sensor FX-550): Digital Fiber Amplifier, Connector type, NPN.
A digital fiber amplifier holds the light source, receiver and switching electronics of a fiber sensor; the fiber head is connected to it and mounted at the detection point.
More Panasonic sensors, PLCs and servo parts: Panasonic range.
Technical data
| Model | FX-551 |
|---|---|
| Series | Digital Fiber Sensor FX-550 |
| Supply voltage | 12 to 24 V DC +10 -15 % Ripple P-P 10 % or less |
| Output | NPN open-collector transistor ・Maximum sink current: 100 mA ・Applied voltage: 30 V DC or less (between output and 0 V) ・Residual voltage: 2 V or less |
| Output: Output operation | Switchable either Light-ON or Dark-ON by L/D mode |
| Output: Short-circuit protection | Incorporated |
| Response time | FAST: 60μs or less, STD: 250μs or less, LONG: 2ms or less, U-LG: 4ms or less, HYPR: 24ms or less, selectable |
| Sensitivity setting | 2-point teaching / Limit teaching / Full-auto teaching / Manual adjustment |
| Incident light sensitivity setting | Incorporated, 4 steps |
| Incident light intensity display range | FAST / STD: 0 to 4,000, LONG: 0 to 8,000, U-LG / HYPR: 0 to 9,999 |
| Timer function | Incorporated with variable OFF-delay / ON-delay / One-shot / switchable either effective or ineffective |
| درجة الحماية | IP40(IEC) |
| Vibration resistance | 10 to 150 Hz frequency, 0.75 mm double amplitude (10 G max.) in X, Y and Z directions for two hours each |
| Shock resistance | 98 m/s² acceleration (10 G approx.) in X, Y and Z directions five times each |
| Emitting element (modulated) | Red LED (Peak emission wavelength: 660 nm) |
Key points (per Panasonic)
- Product details: Amplifiers Connector type
- Material: Enclosure, Case cover: Polycarbonate, Switch: Polyacetal
Typical applications
- Electronic component and semiconductor equipment
- Packaging and assembly machines
- Detection of small parts with fiber heads
- Multi-channel detection on DIN rails
- Replacement of an identical amplifier
Compatibility and replacement
Order with the complete Panasonic part number FX-551; suffixes such as P (PNP output) or -C2 (2 m cable) change the version, so check the label of the old amplifier.
If the label of the old part is worn or the model is discontinued, send us a photo and we will confirm the current Panasonic equivalent before quoting.
What to check first
- NPN or PNP output
- Cable or connector connection
- Compatible fiber units
Frequently asked questions
What is the response time?
FAST: 60μs or less, STD: 250μs or less, LONG: 2ms or less, U-LG: 4ms or less, HYPR: 24ms or less, selectable, according to the Panasonic product data.
How much does it weigh?
Net weight: 15 g approx., Gross weight: 55 g approx., according to the Panasonic product data.
What type of output does it have?
NPN open-collector transistor ・Maximum sink current: 100 mA ・Applied voltage: 30 V DC or less (between output and 0 V) ・Residual voltage: 2 V or less, according to the Panasonic product data.
Do you supply larger quantities for projects?
Yes. For panel builders, OEMs and plant projects we quote complete lists; send the bill of materials on WhatsApp or through the inquiry form.
Do you ship to my country, and what is the warranty?
Yes. RendatSP ships worldwide from Yiwu, China, by air in 5 to 7 days once the part is ready, and every part carries a 1-year warranty. Send the order number and quantity on WhatsApp and we will reply with a quotation.
Before you order
Compare the complete order number on the old unit with this page, including the suffix: in most ranges the last characters set the coil voltage, current range or version. If the label is worn, send us a photo and we will identify the part.
RendatSP ships from Yiwu, China, to factories worldwide; air delivery usually takes 5 to 7 days once the part is ready. The part is new and original with a 1-year warranty (shipping, payment and warranty). For a quotation, message us on WhatsApp with the order number and quantity. We also have agents in Saudi Arabia, Iraq, the UAE, Egypt, Oman, Libya, Morocco, Mauritania, Yemen, Algeria and Jordan.

