Radio Energie RE0444 L Tacho generator KM811491G01

Radio Energie REO444L DC Tachogenerator FAQ

1. What is the Radio Energie REO444L DC Tachogenerator?
   The REO444L is a DC tachogenerator widely used in the lift, elevator, and escalator industries as a speed sensor. It ensures precise stopping at floors, making it a popular choice among companies like OTIS, KONE, SCHINDLER, and THYSSENKRUPP.

2. What are the main mechanical features?

   • Shaft Options: Plain or keyed 11 mm bore
   • Mounting: Flange-mounted design
   • Friction Wheels (Spare Parts): Available in 37 mm and 75 mm sizes
   • Maximum Speed: Up to 8,000 RPM
   • Moment of Inertia: 0.62 kg·cm²
   • Weight: Approximately 1.0 kg

3. What are the key electrical specifications?

   • Maximum EMF: 300 V
   • Voltage Gradient: 60 V per 1,000 RPM
   • Armature Resistance: 160 Ω
   • Maximum Thermal Load: 0.1 A
   • Linearity Error: < 0.15% ET (End of Travel)
   • Ripple Rate: < 1% Ec (No-load voltage ripple)

4. Which industries commonly use the REO444L?
   Its primary use is in lifts, elevators, and escalators for accurate speed sensing. Major OEMs and service providers in the vertical transport industry rely on this model for its dependability and ease of integration.

5. How is the REO444L typically mounted and connected?

   • Mounting: Flange-mounted for secure integration into the drive or motor assembly.
   • Bore Size: 11 mm plain or keyed shaft for coupling.
   • Cable: Supplied with at least 4 meters of cable, facilitating straightforward electrical connections.

6. What about friction wheels and their sizes?
   The tachogenerator can be configured with friction wheels to measure speed via wheel contact. Two sizes are available:

   • 37 mm
   • 75 mm

7. What is the maximum operating temperature range?

   • Operating Temperature: -20°C to +80°C.
   • Climatic Protection: Rated “Ca” under IEC 68-1, ensuring suitability for typical indoor or semi-protected industrial conditions.

8. What is the IP rating of the REO444L?

   • Ingress Protection: IP44 (as per IEC 34-5).
     This rating provides protection against solid objects greater than 1 mm and splashing water from any direction.

9. Are there any notable part numbers or compatibility considerations?

   • KONE p/n KM276027 re.0444l is a common reference for this tachogenerator.
   • The REO444L can also be cross-referenced or retrofitted in systems originally designed for similar DC tachogenerators.

10. Where can I find additional information or order spare parts?

• Ex Stock Availability: The REO444L with an 11 mm bore is often available from stock, complete with a standard cable length.
• Friction Wheels: The 37 mm and 75 mm wheels can also be ordered as spare parts.
• Technical Support: Contact the manufacturer or authorized distributors for datasheets, diagrams, or further assistance regarding installation and maintenance.