Single-turn Absolute Encoder A/959CS
- Category: Encoder, Absolute Encoder, Single-turn Absolute Encoder, SENSORS
This encoder addresses the need for precise positioning in demanding industrial environments where analog sensors fail. Its absolute SSI architecture eliminates counting errors upon restart, ensuring the system knows its exact position immediately after any stoppage or production cycle without costly manual recalibration.
Optical technology with IR ASIC photodiodes and an LED source ensures stable readings up to 4000 rpm intermittent. The SSI interface transmits data from the MSB controlled by an external clock, allowing transmission frequencies between 100 kHz and 800 kHz for rapid integration into complex automation systems without signal loss.
Constructed with sealed bearings and a stainless steel or aluminum housing, it withstands radial loads up to 40/110 N and impact resistances of 30 G x 11 ms. Its compact design allows installation in confined spaces while maintaining mechanical integrity under 10 G vibrations. Available in guemisa.es.
- SSI absolute architecture with reverse polarity protection for reliable operation without recalibration after shutdowns.
- LED power supply with an average lifespan exceeding 100,000 hours ensures minimal maintenance in long production cycles.
- IP65 certified environmental resistance and thermal range of -40 to +85 °C for outdoor or heavy machinery.
- RS422 interface compatible with standard control systems and clock frequencies up to 800 kHz.
Technical Frequently Asked Questions
What alignment precautions does the hollow encoder shaft require?
The hollow shaft must be perfectly centered to prevent excessive lateral loads that could compromise the bearings. Angular alignment within ±1° and radial alignment within ±0.2 mm are recommended to ensure a bearing life of >10⁵ at 1000 rpm without premature wear of the internal optical mechanism.
What connectors and output options are available?
IP65 12-pin connectors are available for axial or radial connection with a 1-meter cable. Options include standard SSI (SL) or preset SSI (S1) outputs, as well as variants with surge protection and sealed bearings (Z) according to the manufacturer's specific ordering code.
What are the operating limits for temperature and humidity?
The device operates between -40 °C and +85 °C in both operation and storage, with IP65 protection making it resistant to dust and splashing water. EMC certifications EN 61000-6-2 and EN 61000-6-4 ensure stable operation against electromagnetic interference in noisy industrial environments.
How does it integrate with external control systems?
Data output is driven by an external clock, transmitting the position value from the MSB via RS422 protocol. This allows a maximum operating frequency of up to 800 kHz, facilitating direct connection to PLCs or controllers that require high-speed, real-time data acquisition without significant latency.
What certifications and standards does the A/959CS comply with?
The A/959CS is manufactured according to ISO 9001 standards and bears the CE marking and declaration of conformity. It complies with EMC directives according to EN 61000-6-2 and EN 61000-6-4 for electromagnetically demanding environments. Its IP protection rating is certified according to IEC EN 60529, EN 60529, and IEC 529, and it comes with a 2-year warranty from the date of delivery.
Properties
| Feature | Specification |
|---|---|
| Encoder Type | Absolute with Fieldbus (SSI) |
| Maximum Resolution | 13 to 16 bits (8192 to 65536 positions) |
| Exit Codes | Gray, Binary |
| Power Supplies | 10 ÷ 30 VDC |
| Maximum Operating Frequency | 800 kHz |
| Operating Temperature Range | -40 – +85 °C |
| Cable Outlet | IP65 |
| Axis (Tree) | Ø 8 mm / 10 / 12 / 15 mm Stainless Steel |
| Weight | 200g |
| Impact Resistance | 30 G x 11 ms |
| Maximum Continuous RPM | 6.000 / 3.000 |
| Starting Torque | 50 / 90 gcm |
| Max. Radial/Axial Load | 40/110 N |
| Vibration Resistance | 10 G (10 – 1000 Hz) |
| Warehouse Temperature | -40 – +85 °C |
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