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Absolute Rotary Pulse Encoder GEL 15xSSI

Absolute Rotary Pulse Encoder GEL 15xSSI - Lenord & Bauer Absolute Encoder GEL 15xSSI



General Information

In contrast to incremental rotary encoders, absolute rotary pulse encoders supply unambiguous information in each angle position. The advantage of this process is that the actual position is always transmitted to the evaluation electronic seven after a power failure. Measuring errors caused by faulty impulses and accumulating errors are excluded in addition.
  • Single-turn: 4096 measuring steps per 360
    (optional: 8192)
  • Multi-turn: 4096 measuring steps per 360
    (optional: 8192) with max 4096 rpm
  • Permitted shaft load 250 N (axially and radially)

Rotary Pulse Encoder Design

Flange and housing made of anodised aluminium. A 12-mm ball bearing with a sealing ring is used as the shaft bearing. We differentiate between clamping flange and synchronising flange.

Measuring Principle

The absolute encoders work on the optical measuring principle. The code disk is scanned via GaAlAs diodes. By using a special opto-array with a reference transistor (the load on the LED can be controlled here) and ASICS developed for this purpose it was possible to improve long-term reliability still further.

Rotary Pulse Encoder Code types

The absolute encoders supply their information in Gray code.

Technical Data

Electrical data
Sensor system GaAlAs diode photo array, phototransistors
Measuring step deviation <+ 2' 38"
Output frequency max. 10 kHz
Output code Gray
Operating voltage range + 11 V ... + 30 V DC
Operating current Single-turn: 60 mA, typical max. 80 mA
Multi-turn: 70 mA, typical max. 90 mA
Electromagnetic compatibility EMC Emitted interference DIN EN 50081-2
Interference immunity DIN EN 50082-2
Mechanical data
Operating speed 3.000 min-1 max. (permanent)
4.000 min-1 max. (short-time)
At max. shaft load and 20C ... +60C working
temperature. Higher values possible with lower loads.
Angular acceleration 105 rad/s2 max.
Inertia torque (rotor) 45 gcm2
Operating torque (at speed of 1000 min-1) <e;5 Ncm (GEL 152/153/158/159),
8 Ncm (GEL 154/157
Starting torque <e;1 Ncm (GEL 152/153/158/159),
4 Ncm (GEL154/157)
Approved shaft load 250 N axial and radial
Bearing service life 109 revolutions
Weight approx. 0.5 kg (GEL 153 /157 /159)
approx. 0.7 kg (GEL 152 /154 /158)
Environmental data
Working temperature range -20C ... +60C (option -40C ... +85C)
Storage temperature range -25C ... +70C
Permitted relative humidity 85 % without moisture condensation
Impact resistance 200 m/s ; 11 ms (DIN IEC 68)
Vibration resistance 5 Hz ... 1000 Hz; 100 m/s (DIN IEC 68)
Type of protection (DIN 40050)
GEL 152/153/158/159
GEL 154/157

IP 65 (Nilos ring)
IP 66 (sealing ring)

Dimensioned drawings

Dimensioned drawing of Absolute Encoder GEL 152/153 - Lenord & Bauer
Dimensioned drawing of Absolute Encoder GEL 154/157 - Lenord & Bauer
Dimensioned drawing Absolute Encoder GEL 158/159 - Lenord & Bauer


Pin layout

Pole Assignment Description
1 -UB 0 V DC
2 DATA + in pairs twisted with pole 3
3 DATA - in pairs twisted with pole 2
4 Cycle + in pairs twisted with pole 5
5 Cycle - in pairs twisted with pole 4
6 code direction E2,
activ-low
low-signal
high-signal
7 +UB + 11 ... 30 V DC

Available designs - Single-turn absolute encoder

Type Output Circuit Scope of Delivery Includes
GEL 153 G 4096 A35 3 7-pole mating connector GG 76 (Binder)
GEL 159 G 4096 A35 3 7-pole mating connector GG 76 (Binder)
GEL 159 G 4096 A35 3 7-pole mating connector GG 76 (Binder)

Available designs - Multi-turn absolute encoder

Type Output Circuit Scope of Delivery Includes
GEL 152 G 4096 N35 3 7-pole mating connector GG 76 (Binder)
GEL 154 G 4096 N35 3 7-pole mating connector GG 76 (Binder)
GEL 158 G 4096 N35 3 7-pole mating connector GG 76 (Binder)


Input Circuit E2 Absolute Encoder Gel 15xSSI input circuit - Lenord & Bauer

Output Circuit E2 Absolute Encoder Gel 15xSSI output circuit - Lenord & Bauer

Available designs - Multi-turn absolute encoder

GW 76 - 7-pole mating connector offset (optional)

Lenord & Bauer: Rail Speed Sensors & Rotary Pulse Encoder

Other products relating to GEL 15SSI are: GEL 15X, GEL 15XF, GEL 235, GEL 2035, GEL 2310, GEL 235 Accessories