Wenglor
Wenglor 277.55 retro-reflex sensor 15000 mm range electrician tool
Retro-reflex sensor detects objects up to 15000 mm using a 655 nm red laser with PNP antivalent output and IP67 housing
- TypeTest Equipment
- Color/FinishRed
- Item Count1 pack
- Selling UnitBox
- Parts3 Years
- Labor1 Year
- Detects objects up to 15000 mm away
- Laser class 2 with 655 nm red light source
- IP67 rated plastic housing with full encapsulation
- PNP antivalent output switches 200 mA at 3 kHz
- Potentiometer adjustment with 10...30 V DC supply
Industrial sensing range
The Wenglor 277.55 retro-reflex sensor detects targets up to 15000 mm using a red laser at 655 nm. It is built for electricians and automation engineers who need precise presence detection in material-handling or packaging lines. The PNP antivalent output provides both normally-open and normally-closed signals from a single M12 connector.
Thermal and electrical envelope
The sensor operates from a 10...30 V DC supply and draws less than 30 mA at 24 V. Switching frequency reaches 3 kHz with a response time of 166 µs and a fixed 5 ms off-delay. Temperature drift stays below 10 % across the -10...60 °C range, and the laser is rated Class 2 under EN 60825-1 for safe use in normal ambient light up to 10000 Lux.
Build quality and daily mounting
The red plastic housing is fully encapsulated to IP67, resisting wash-down and dust ingress. A potentiometer on the body adjusts the switching point without tools. The M12 × 1, 4-pin connection simplifies cable routing in tight cabinets, while short-circuit and reverse-polarity protection guard the 200 mA output during wiring errors.
Highlights
- Detects objects up to 15000 mm away
- Laser class 2 with 655 nm red light source
- IP67 rated plastic housing with full encapsulation
- PNP antivalent output switches 200 mA at 3 kHz
- Potentiometer adjustment with 10...30 V DC supply
Specifications
| Brand | Wenglor |
|---|---|
| Model | 277.55 |
| Type | Test Equipment |
| Color/Finish | Red |
| Item Count | 1 pack |
| Selling Unit | Box |
| Parts | 3 Years |
| Labor | 1 Year |
Questions about this item
How do I mount and wire the 277.55 sensor, and what alignment step is often missed?
Mount the sensor, connect the 4-pin M12 plug to a 10...30 V DC supply respecting PNP polarity, then align the red 655 nm laser spot on the RQ100BA reflector placed between 80 mm and 15000 mm; the narrow 0,6 ° opening angle makes precise aiming critical.
What component will need replacement first during long-term use?
The laser light source is rated for 100000 h at 25 °C; after that the emitter degrades and the sensor must be replaced.
What limit appears first when the sensor runs continuously at high speed?
At the maximum 3 kHz switching frequency the 166 µs response time and fixed 5 ms off-delay become the bottleneck, preventing faster cyclic operation.
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