GEL 2471 - 2 Channel Speed Sensor
Description
- Application approved speed sensor based on the principle of eddy current (non-magnetic)
- Maintenance- and wear-free operation due to non-contact measurement of rotation
- Suitable for electrically conduting target wheels
- Safe detection of slow rotation from 0 Hz without pulse loss and for high-speed rotation up to 25 kHz
- Two channels shifted by 90° provide the direction of rotation
- Robust and compact stainless steel housing suitable for harsh application
- Simple flange mounting
- Customized cable fittings
Features
- Module of target wheel 2.00 to 3.00
- Measuring range 0 Hz to 20 kHz
- Temperature range -40 °C to +120°C
- Protection class IP 68
- Type test according to EN 50155
Advantages
- Weight-saving construction due to light-weight target wheels made of e.g. Aluminium
- Maintenance-free as measuring surface does not attract magnetical paritcles such as ferric powder or swarf
- IdeaI for operation in presence of ferric particles due to non-magnetic measuring system
Fields of application
- Rail vehicles
- Traction control
- Anti-slip
- Motor speed
- Anti-skid - Automation
- Measurement of speed and positions at gears, motors and roller
Technical Data
Signal pattern | E | F | S | G | V | X |
Electrical data | ||||||
Supply voltage VS (reverse polarity protected) |
10 to 20 V DC | |||||
Current consumption per channel IS (without load) | ≤ 40 mA | |||||
Output signal (short circuit-proof) | Square-wave signals | |||||
Output signal level high (1) | ≥ VS - 1.8 V | |||||
Output signal level low (1) | ≤ 1.5 V | |||||
Output current per channel | ≤ 20 mA | |||||
Input frequency (target wheel) | 0 to 20 kHz | |||||
Output frequency | 0 to 20 kHz | |||||
Duty (depends on measuring scale and air gap) |
50 % ± 25 % | |||||
Phase shift | - | typ. 90° | ||||
Slew rate (2 m cable) | ≥ 10 V/μs | |||||
Electromagnetic compatibility (2) | Rail vehicles (EN 50121-3-2) Industrial applications (EN 61000-6-1 to 4) |
|||||
Insulation | 500 V AC (EN 60439-1) | |||||
Mechanical data | ||||||
Module m of target wheel | 2.00 / 3.00 | |||||
Permissible air gap (for module m) m = 2.00 (D.P. = 12.7) m = 3.00 (D.P. = 8.47) |
typ. 0.7 mm typ. 0.8 mm |
|||||
Width of target wheel | ≥ 10 mm (smaller ones on request) | |||||
Form of target wheel | Involute gear as per DIN 867, rectangular gear 1:1 or slotted disk (on request) | |||||
Material of target wheel | Steel, aluminium (others on request) | |||||
Operating and ambient temperature | -40 °C to +120 °C | |||||
Storage temperature | -40 °C to +120 °C | |||||
Protection class | IP 68 | |||||
Vibration resistance | EN 61373 cat. 3 | |||||
Shock resistance | EN 61373 cat. 3 | |||||
Type test | EN 61373 cat. 3 | |||||
Housing material of sensor | Stainless steel | |||||
Weight of sensor (2 m cable) | 500g | |||||
Electrical connection | ||||||
Cable | Cable halogen free and screened (specification on request), cable outlet straight or lateral | |||||
Cable length | ≤ 100 m | |||||
Cable diameter | 8.2 mm | |||||
Cable cross section | 6 x 1.0 mm2 | |||||
Cable type | LK1069 | |||||
Bending radius static / dynamic | 24 mm / 41 mm |
Signal pattern, Signal level
Signal pattern
V (VS: 10 ... 20 V DC)
X (VS: 10 ... 20 V DC)
1, 2 = Channel 1, Channel 2
= Channel 1 inverse, Channel 2 inverse
VS = Supply voltage
Electrical connection, Dimensions
Electrical connection
Signal | E | F | S | G | V | X |
Channel 1 | yellow | yellow | yellow | yellow | yellow | yellow |
Channel 2 | white | white | white | white | ||
black | black | black | ||||
brown | brown | |||||
GND (0 V) | blue | blue | blue | blue | blue | blue |
+VS (10 ... 20 V DC) |
red | red | red | red | red | red |
Cable / Screen | 1 / 1 | 1 / 1 | 1 / 1 | 1 / 1 | 1 / 1 | 1 / 1 |
(Straight cable outlet )
1 Sealing ring
(21 x 2,5 mm, NBR)
(Lateral cable outlet )
1 Sealing ring
(21 x 2,5 mm, NBR)
Assembly Drawing
B Drilling plan (top view)
X Bevelling
d Permissible air gap
0.7 mm
1 Mounting screw (recommended: M8 x 20, EN ISO 4762)
2 Sealing ring (21 x 2.5 mm; NBR)
3 Direction of rotation of the target wheel (forwards)
4 Visible surface (target wheel rotating forwards)
5 Index pin
Type code
Type code GEL 2471
Notes: For a special customized version a Y-No. will be created. A special version 2471Yxxx is manufactured according
to a drawing or application description and could differ from the technical standard specification.
Example for customized
cable connections
Encoder end