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Tandem encoder GEL 290
The tandem encoder GEL 290 was specially developed for
applications with high requirements on redundancy.
Several independently operating encoders are mounted on
the drive shaft as one unit. The length of the encoder system
is reduced to a minimum by design measures.
The tandem encoder is made up for each specific application.
The measuring scale on the rotary encoder used is of robust
design so that it can even withstand extreme impacts and
vibration. The magnetic sensors are resistant to harsh environmental
conditions such as dirt, oil, humidity or condensation
due to temperature differences. The rotary encoder
contains bearings that ensure maintenance-free, durable
operation in the harshest operating conditions.
- Modular design
- Max. 3 systems
- Combination of incremental rotary encoder and absoluterotary encoder
- Resolution
- Incremental rotary encoder 266240 increments per turn
- Absolute rotary encoder 65536 steps per turn - Protection class (overall system) IP66
- Solution individually tailored to the specific application
- Various signals redundant due to flexible design
- Maintenance-free, durable operation in harshest ambient conditions due to selected bearing and measuring systems
- General mechanical engineering
- Process automation
- Wind power / regenerative energies
Description
The concept of the tandem encoder foresees the mounting of several independently operating encoders on one shaft. For this purpose, the encoders have been equipped with a continuous shaft or hollow shaft. In this way the requirements from process automation and process data acquisition for checking and safeguarding processes at the same time can be realised. The length of the encoder system has been kept as short as possible to permit trouble-free usage in practice.
Modular design
The tandem solution allows assembly of different encoders
in a relatively short set.
A central element of the tandem encoder is the incremental
rotary encoder GEL 292, this device must be included
at least once in each tandem system. The incremental rotary
encoders are equipped with a flexibly mounted hollow
shaft into which coupling elements with an accurate fit are
inserted; in this way space is saved on fitting together the
encoders.
The terminating element on a tandem encoder can be an
incremental encoder with hollow shaft GEL 293 or an absolute
rotary encoder with synchro-flange GEL 235.
The absolute rotary encoder GEL 235 is available with various
interfaces and bus covers (see Absolute rotary encoder
GEL 235 – interfaces).
The incremental rotary encoders GEL 292 and GEL 293
are technically identical and vary only in the housing design.
Sectional view of a tandem encoder with basic module GEL 292 and incremental rotary encoder GEL 293
| T, TN | U, UN | S, SN | V, VN | X, XN | |
|---|---|---|---|---|---|
| General | |||||
| Measuring range | 40 ... 266240 steps | ||||
| Accuracy | 0.005° | ||||
| Electrical data | |||||
| Supply voltage VS | 5 V DC ± 5% | 10 to 30 V DC | |||
| Power consumption | ≤ 1.3 W, without load | ||||
| Logik level | TTL | HTL | |||
| Mechanical data | |||||
| Moment of inertia of rotor | 8 . 10-5 kgm2 | ||||
| Max. operating speed (r.p.m.) | 8,000 min-1 | ||||
| Weight | 0.7 kg per system | ||||
| Admissible coupling offset axial radial |
±1 mm ±0.5 mm |
||||
| Bearing life cycle at axial load | > 15.000 . 106 revolutions | ||||
| Housing | stainless steel, X12CrMoS17-1,4104 | ||||
| Ambient data | |||||
| Working temperature range | -40 °C to +85 °C | ||||
| Operating temperature range | -40 °C to +85 °C | ||||
| Storage temperature range | -40 °C to +105 °C | ||||
| Degree of Protection (EN 60529) | IP 66 | ||||
| Vibration protection (DIN EN 60068-2-6) | 100 m/s2, 10 to 2000 Hz | ||||
| Shock protection (DIN EN 60068-2-27) | 1000 m/s2, 11 ms | ||||
| EMC | EN 61000-6-1 to 4 | ||||
| Insulation strength (DIN EN 60439-1) | Ri > 1 MΩ at 500 V AC | ||||
Technical data - absolute rotary encoder GEL 235
| General | |
|---|---|
| Incremental deviation | < 0.01° |
| Accurary | ± 0.08° |
| Electrical data | |
| Operating voltage | 10 to 30 V DC with reverse voltage protection (option: 5 V - 5%, +25%) |
| Power consumption | < 1.6 W, without load |
| Resolution Singleturn (ST) | 8, 9, 10 to 16 Bit (measuring steps over 360°) |
| Resolution Multiturn (MT) | 4, 8, 12 Bit (revolution, mechanical gear) |
| Interface | SSI, PROFIBUS Encoder Profile V 1.1, EtherCAT (CoE), CANopen Encoder Profile DS406, analogue 4 to 20 mA |
| Analogue output signal | Sin/Cos difference signal 1 VPP, 64 periods per resolution |
| Mechanical data | |
| Moment of inertia of rotor | 611.8.10-6 kgm2 |
| Material | anodised aluminium |
| Weight Singleturn | 300 g |
| Weight Multiturn | 310 g |
| Operating speed (limit value) Singleturn | 12,000 min-1 |
| Operating speed (limit value) Multiturn | 10,000 min-1, 12,000 min-1(short-term) |
| Operating torque | < 3 Ncm |
| Bearing life cycle | > 105 at 1000 min-1 |
| Shaft sealing ring | Material: Viton, protection class: IP 67, reduced operating speed: max. 6,000 min-1 |
| Ambient data | |
| Working temperature range | -40 °C to +85 °C |
| Operating temperature range | -40 °C to +105 °C |
| Storage temperature range | -40 °C to +85 °C |
| Degree of Protection (acc. to DIN 60529) | IP 67 |
| Vibration protection (DIN EN 60068-2-6) | 200 m/s2, 10 to 2,000 Hz |
| Shock protection (DIN EN 60068-2-27) | 2000 m/s2, 11 ms |
| EMC | EN 61000-6-1 to -4 |
| Insulation strength | Ri > 1 MΩ at 500 V AC |
| Relative humidity of air max. | 99 % |
| Condensation | permissible |
| Synchro flange | |
| Shaft load (radial/axial) | at 1,000 min-1 = 70 N / 50 N, at 6,000 min-1 = 50 N / 40 N |