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GEL 2471 - 2 Channel Speed Sensor

ti211_e-47

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
E (VS: 10 ... 20 V DC) only channel 1
V (VS: 10 ... 20 V DC)

F (VS: 10 ... 20 V DC) only channel 1 and
X (VS: 10 ... 20 V DC)

S (VS: 10 ... 20 V DC)

G (VS: 10 ... 20 V DC)

Voltage output

Explanations
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

Dimensions
(Straight cable outlet )

1   Sealing ring
    (21 x 2,5 mm, NBR)


Dimensions
(Lateral cable outlet )

1 Sealing ring
(21 x 2,5 mm, NBR)



Assembly Drawing


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
Please observe the EMC-reference into the operating instruction!




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
Cable end