Incremental bearing-free rotary encoder – GEL 2475

Properties

• Incremental, differential measuring 1-/2-channel speed sensor based on the Hall principle
• Highest signal quality for reliable evaluation in control systems
• Maximum compatibility due to voltage or current output and standstill voltage
• 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
• Various configuration options
• Compact and robust design
• Easy to assemble
• Reinforced walls in the sensor tube with a diameter of 20 mm provide increased protection against the impact of stones and foreign bodies
• Cable break monitoring
• Suitable for safety applications
• 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

Signal pattern	E-	S-	V-	X-	D-	H-
Electrical data
Supply voltage UB (reverse polarity protected)	10 to 30 V DC
Current consumption IB (without load)	≤ 30 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	0 to 20 kHz
Duty cycle	50% ± 10%
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	Cable outlet straight or at side, connector in accordance with specification
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	1.00/1.25/1.50/1.75/2.00/2.25/2.50/2.75/3.00/3.25/3.50

Signal pattern	EM	DM
Electrical data
Supply voltage UB (reverse polarity protected)	10 to 20 V DC
Current consumption IB (without load)	≤ 15 mA	≤ 25 mA
Output signal (short-circuit-proof)	Square-wave signals
Output signal level High	≥ UB- 1.8 V
Output signal level Low	≤ 1.5 V
Output current per channel	≤ 10 mA
Frequency range	0 to 8 kHz
Duty cycle	50% ± 10%
Phase offset	-	typ. 90°
Mechanical data
Sensor tube material	Stainless steel
Flange material	Stainless steel
Sensor weight (incl. 2 m cable)	500 g
Cable
Cable	halogen-free and screened
Cable diameter	5.4 ± 0.2 mm	8.0 ± 0.3 mm
Cable cross section	4 x 0.5 mm2	12 x 0.34 mm2
Minimum bending radius static/dynamic	16 mm/27 mm	24 mm/40 mm
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	1.00/1.25/1.50/1.75/2.00/2.25/2.50/2.75/3.00/3.25/3.50

Signal pattern	EI	DI	VI
Electrical data
Supply voltage UB(reverse polarity protected)	10 to 20 V DC
Output signal (short-circuit-proof)	Square-wave signals
Output signal level High	typ. 14 mA
Output signal level Low	typ. 6 mA
Output current per channel	≤ 16 mA
Frequency range	0 to 12 kHz
Duty cycle	50% ± 10%
Phase offset	-	typ. 90°
Mechanical data
Sensor tube material	Stainless steel
Flange material	Stainless steel
Sensor weight (incl. 2 m cable)	500 g
Cable
Cable	halogen-free and screened
Cable diameter	5.4 ± 0.2 mm
Cable cross section	4 x 0.5 mm2
Minimum bending radius static/dynamic	16 mm / 27 mm
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	1.00/1.25/1.50/1.75/2.00/2.25/2.50/2.75/3.00/3.25/3.50