GEL 15x
GEL 15XF
GEL 15xSSI
GEL 235
GEL 2035
GEL 2310
GEL 235 Accessories

GEL 8110
GEL 8115
GEL 8130
GEL 8135
GEL 8140
GEL 8180
GEL 8190
GEL 8310
GEL 8610

GEL 207
GEL 208
GEL 209
GEL 219
GEL 260
GEL 293
GEL 27xx

GEL 212
GEL 213
GEL 214

GEL 176
GEL 177
GEL 220

GEL 2432
GEL 2442
GEL 2443
GEL 2444

GEL 8810
GEL 8819

Programmable Preselect Counter GEL 104

GEL 247
GEL 248
GEL 2471
GEL 2472
GEL 2474
GEL 2477
GEL 2478

Temperature Sensor Gel 2161
Test Device for Minicoder GEL 210K
Test Device GEL 210TX
Accessories

General information

The MiniCoder family from Lenord + Bauer offers spacesaving solutions for the contactless measurement of rotational movements with direction sensing. The MiniCoders operate from 0 Hz on for the detection of very slow movements without pulse loss and up to 20 kHz for the direct integration into high-speed motors and machines. The high interference immunity ensures reliable function even under adverse operating conditions. The MiniCoder GEL 2471 works according to the induction principle and scans targets made of electrically conducting materials. The sensor can be factory-programm to scan either toothed wheels made of steel or for example, a weightsaving aluminium toothed ring mounted on an existing motor fan wheel.

Main Features

• module range from m = 2.0 to m = 3.0
• measuring frequency from 0 to 20 kHz
• simple flange-mounting without adjustment
• robust stainless steel casing
• straight or side cable outlet
• customized cable fittings
• very high protection class IP 68
• wide temperature range -40 °C to +120 °C
• high electromagnetic compatibility

Fields of application

• rail vehicles
- traction control
- wheel slip prevention
- engine speed

• machine automation
- measurement of speeds and positions in machines and motors

Output signals

• signal forms:
- single-track square-wave signals
- two 90°-shifted square-wave signals for direction sensing
- one square-wave signal and one direction signal

All signals are also available in their inverted form.

Technical data

Electrical Data
Supply voltage	UB = 10 ... 20 V DC, reverse polarity protected
Current consumption without load	IB≤ 40 mA
Output signals	square-wave, push-pull driver Imax = 20 mA
Signal pattern
Input and output frequency	0 ... 20 kHz
Duty	0.5 +/- 0.25
Rise time (2 m cable)	≥ 10 V/µs
Max. cable length	100 m
Electromagnetic Capability *
Case 1: screen connected to housing Case 2: screen not connected to housing	rail vehicles: EN 50121-3-2 industry applications: EN 50081-1; EN 61000-6-2 rail vehicles: test in according with EN 50121-3-2 1)
Isolation strength	500 V
Connection	fully potted cable outlet with stress relief, 6 x 1 mm2 screen connected at encoder (recommended), optionally insulated cable specification: please request separately
Mechanical data
Module	m = 2.0; 3.0 (other modules between 2.0 and 3.0 available on request)
Admissible air gap	depending on module, frequency and temperature range up to max. 1.5 mm
Working and operating temperature range	-40°C ... +120°C
Storage temperature range	-40°C ... +120°C
Protection class	IP 68
Vibration resistance (EN 60068 part 2-6)	200 m/s2
Shock resistance (EN 60068 part 2-27)	2000 m/s2
Width of measuring toothed-wheel	≥ 10 mm taking into account all tolerances
Form of measuring toothed-wheel	involute teeth, slotted teeth, others on request
Material of measuring toothed-wheel	steel or alternatively aluminium other electrically conducting materials on request
Weight with 2 m cable without fittings	approx. 500 g
Housing	Stainless Steel

⁽¹⁾ When the shield is not connected at the encoder end, the test level in acc. with EN 61000-4-4 may be lowered depending on installation conditions.

* Test according to EN 61000-4-3: In some cases strong electromagnetic fields can inherently affect the sensor’s HF-oscillator when the sensor is mounted in the open. Sensors installed in a casing are generally sufficiently screened from such fields.

Dimensions

Signal level

Installation drawing, EMC and ESD instructions

EMC Instructions

To improve the electromagnetic environment please observe the following installation advice:

• Connect the screen at the end of the cable using a large contact surface, if possible.
• Keep all unscreened cables as short as possible.
• Keep grounding connections as short as possible using large cross-sections (low-induction grounding strip, ribbon cable)
• If the event of differences in potential between machine ground and ground of electronic circuit, appropriate measures must be taken to prevent equalizing currents from flowing via the cable shield (e.g. by providing for large-section equipotential bonding conductors or by using cables with separate double shielding where the shields are connected only at one end).
• Lay signal and control cables away from power lines.
• The power supply must correspond to installation class 0 or 1 in according with B.3 of EN 61000-4-5 of 1995.

ESD instructions

(Components sensitive to electrostatic discharge) As with any other electronic device, the MiniCoder must be connected with the necessary precautions against the risk of electrostatic discharge. Connector pins and connecting wires must not be touched without suitable discharge protection devices. Observe the instructions of EN 100 015-1.

Supply voltage concept

Examples of customized cable connections

Cable Wire Assignment

(GEL 2471 without fittings, screened)

Speed Sensor Gel 2471 Typecode

Ordering information: If customized cable, conduit and connectors are required, please supply detailed specifications.

Lenord & Bauer: Rail Speed Sensors & Rotary Pulse Encoder