Incremental bearing-free rotary encoder – GEL 2477

Properties

• Incremental measuring 1-/2-channel speed sensor based on the magnetoresistive principle
• Maximum signal quality with pulse multiplication for precise evaluation in control systems
• High EMC immunity for interference-free signal transmission in challenging industrial environments
• Configuration flexibility thanks to freely selectable cable outlet, cable protection, and connector variants
• In accordance with a range of standards and requirements for a variety of applications:
  Technical data - Environmental test

Advantages

• Optimized lifecycle cost
• Maintenance and wear-free
• Reduction of torque ripple in drives
• Higher energy efficiency due to high control accuracy
• Simple integration
• Various configuration options
• Compact and robust design
• Easy to assemble
• High signal quality

Industry and automation

Printing and packaging machines:

• Synchronization of conveyor belts
• Register control during printing

Automotive and commercial vehicles

Vehicle drives:

• Speed measurement on crankshafts and camshafts for engine control units
• Determination of rotor position in electric motors (BLDC, PMSM)
• Input/output speed in gears for gear change strategy

Vehicle movement dynamics systems:

• Wheel speed sensors for ABS/ESP
• Torque distribution in all-wheel drive systems

Commercial vehicles and agricultural machinery:

• Speed monitoring on PTO shafts, hydraulic pumps
• Harvesting machinery: Worm conveyors, threshing drums

Railroad technology and transportation

Rail vehicles:

• Wheel speed sensors for traction control and brake control
• Drive control for electric locomotives and railcars

Conveyor belts and cable cars:

• Speed monitoring on deflection pulleys
• Drive synchronization in multi-motor systems

Maritime applications

Drive:

• Speed measurement on marine engines, turbochargers, gearboxes, and generators

Auxiliary units:

• Input/output speed detection for slip control

Energy and utilities

Wind turbines:

• Rotor speed for power control
• Pitch adjustment (rotor blade angle control)

Hydropower plants/turbines:

• Speed control for synchronization with mains frequency

Generators and emergency power systems:

• Speed detection for frequency monitoring and load management

Building technology and infrastructure

Elevators and escalators:

• Speed and position of the car
• Safety systems (emergency stop in case of overspeed)

Building machinery:

• Pump and fan speeds in large HVAC systems

Logistics and conveyor technology

Conveyor belts:

• Speed control in distribution centers

Automatic storage systems:

• Positioning of rack feeders

Crane systems:

• Lift and undercarriage control

Pulse multiplication	Factor 02	Factor 04	Factor 08
Electrical data
Supply voltage UB (reverse polarity protected)	10 to 30 V DC
Current consumption per channel IB (without load)	≤ 50 mA
Output signal (short-circuit-proof)	Square-wave signals
Output signal level High	≥ UB - 1.5 V
Output signal level Low	≤ 1.0 V
Output current per channel	≤ 20 mA
Frequency range (output)	0 to 50 kHz	0 to 100 kHz
Duty cycle	50% ± 20%
Phase offset	typ. 90°
Mechanical data
Sensor tube material	Stainless steel
Flange material	Stainless steel
Sensor weight (incl. 2 m cable)	500 g
Cable
Connection	Outlet straight, flying lead
Cable length	≤ 100 m
Screening note	Cable screen is connected directly or, as an option, capacitively in the sensor
Environmental tests
The speed sensor complies with a range of standards and requirements for a variety of applications: Technical data - Environmental test
Requirements for the target wheel
Material	Ferromagnetic steel
Tooth form	Involute gear teeth as per DIN 867 Rectangular teeth, typically 1:1 (other upon request)
Width	≥ 10 mm (smaller upon request)
Module m	1.00/2.00	1.00
Air gap	typ. 0.7 mm (0.4 to 1.0 mm)