Absolute Rotary Pulse Encoder GEL 15x

Absolute Encoder GEL 15x - Lenord & Bauer Rail Speed Sensors and Rotary Pulse Encoders Absolute Encoder GEL 15x





General Absolute Encoder Information

In contrast to incremental rotary pulse encoder, absolute encoders supply unambiguous code information in each angle position. The advantage of this method is that even after a power failure, the actual position is sent to the evaluation electronics. Measurement errors caused by missing pulses and cumulative errors are also eliminated.

  • Single-turn: 4096 measurement increments per 360
    (optional: 8192)
  • Multi-turn: 4096 measurement increments per 360
    (optional: 8192) with max. 4096 revolutions
  • Permissible shaft load 250 N (axial and radial)

Rotary Pulse Encoder Design

The flange and housing consist of anodised aluminium. A 12 mm ball bearing with a sealing ring is used for the shaft bearing. Three different flange versions are available with GEL 153/157/159 (singleturn) and GEL 152/154/158 (multiturn).

Measurement Principle

The absolute encoder works on the optical measuring principle. The code disk is scanned via GaAlAs diodes. By using a special opt-array with a reference transistor (this keeps the load of the LED controllable) and ASICs developed by the company it has been possible to further improve long-term reliability.

Code Types

The absolute encoders supply their information in the Gray code.

Technical Data

Electrical Data
Sensor system GaAIAs diode photo-array, photo-transistor array
Measurement increment deviation ≤ + 2' 38"
Parallel outputs ground-switching, positive-switching
Serial outputs (SSI) RS 422 / 485
Output frequency max. 10 kHz
Output code Gray
Operating voltage range + 11 V ... + 30 V DC
Operating current single-turn: 50 mA, typical, max. 70 mA
multi-turn: 60 mA, typical, max. 80 mA
EMC, electromagnetic compatibility EN 61000-6-2, EN 61000-6-4
Mechanical Data
Operating speed 3000 rpm max. (continuous)
4000 rpm max. (short term)
at max. shaft load and -20C ... +60C
operating temperature, higher values are possible
at low load.
Angle acceleration 105 rad/s2 max.
Operating torque ≤ 5 Ncm at a speed of 1000 rpm
8 Ncm at a speed of 1000 rpm (GEL 154/157)
Starting torque ≤ 1 Ncm, 4 Ncm (GEL154/157)
Permissible shaft load 250 N axial and radial
Bearing life 109 revolutions
Weight approx. 0.5 kg (GEL 153 /157 /159)
approx. 0.7 kg (GEL 152 /154 /158)
Ambient data
Operating temperature -20C ... +60C (optionally -40C ... +85C)
Storage temperature range -25C ... +70C
Permissible relative humidity 85 % without condensation
Shock resistance 200 m/s2 ; 11 ms (DIN IEC 68)
Vibration resistance 5 Hz ... 1000 Hz; 100 m/s2 (DIN IEC 68)
Protection type (DIN 40050)

GEL 152/153/158/159
GEL 154/157
IP 65 (Nilos ring)
IP 66 (sealing ring)

Dimension Drawings

Three different flange versions are available with GEL 153/157/159 (singleturn) and GEL 152/154/158 (multiturn).

Absolute Encoder GEL 15x Dimension drawings 152/153



Absolute Encoder GEL 15x Dimension drawings 154/157



Absolute Encoder GEL 15x Dimension drawings 158/159


Available versions - Input and output circuits

Available versions - Single-turn encoders

Type Output Circuit Scope of delivery contains
GEL 153 G 4096 A 05 0 (ground- switching) 37-pole D-sub-miniature mating connector
GEL 157 G 4096 A 05 0 (ground- switching) 37-pole D-sub-miniature mating connector
GEL 159 G 4096 A 05 0 (ground-switching) 37-pole D-sub-miniature mating connector
GEL 153 G 4096 A 25 2 (positive-switching) 37-pole D-sub-miniature mating connector
GEL 157 G 4096 A 25 2 (positive-switching) 37-pole D-sub-miniature mating connector
GEL 159 G 4096 A 25 2 (positive-switching) 37-pole D-sub-miniature mating connector


Available versions - Multi-turn encoders

Type Output Circuit Scope of delivery contains
GEL 152 G 4096 N 05 0 (ground- switching) 25-pole D-sub-miniature mating connector
GEL 154 G 4096 N 05 0 (ground- switching) 25-pole D-sub-miniature mating connector
GEL 158 G 4096 N 05 0 (ground-switching) 25-pole D-sub-miniature mating connector
GEL 152 G 4096 N 25 2 (positive-switching) 25-pole D-sub-miniature mating connector
GEL 154 G 4096 N 25 2 (positive-switching) 25-pole D-sub-miniature mating connector
GEL 158 G 4096 N 25 2 (positive-switching) 25-pole D-sub-miniature mating connector



Input and Output Circuits


Absolute Rotary Pulse Encoder GEL 15x Output circuit 0 Absolute Rotary Pulse Encoder GEL 15x Output circuit 2 - Lenord & Bauer Absolute Encoder GEL 15x Input Circuit E1 - Lenord & Bauer Rail Speed Sensors and Rotary Pulse Enoders

Single and Multi-turn Encoders

Absolute Encoder GEL 15x multi turn - Lenord & Bauer Rail Speed Sensors and Rotary Pulse Encoders

Abolsute Encoder GEL 15x single turn encoder - Lenord & Bauer Rail Speed Sensors and Rotary Pulse Encoders

Lenord & Bauer: Rail Speed Sensors & Rotary Pulse Encoder

Other products relating to GEL 15x are: GEL 15XF, GEL 15xSSI, GEL 235, GEL 2035, GEL 2310, GEL 235 Accessories