Product Overview

The SICK AFS/AFM60S Pro is a high-precision absolute encoder designed for demanding industrial automation applications requiring reliable position feedback with safety-related performance. Engineered to deliver accurate, repeatable positioning over extended mission life, this encoder supports category 3 and 4 safety functions according to EN ISO 13849-1 standards. With a maximum resolution of 262,144 steps per revolution (18-bit), it ensures precise measurement even in critical safety-critical environments. The encoder features a robust aluminum die-cast housing and stainless steel shaft and stator components, offering excellent durability and resistance to mechanical stress. Its compact design with a 15 mm shaft diameter makes it suitable for integration into tight spaces while maintaining high performance and long-term reliability.

Key Features and Technology

The AFS/AFM60S Pro leverages advanced Gray code technology and SSI + Sin/Cos communication to deliver accurate, noise-resistant position data. It operates with a clock frequency of up to 1 MHz and supports output frequencies up to 153.6 kHz, enabling fast response times in dynamic motion control scenarios. The encoder achieves exceptional repeatability with a standard deviation σr of 0.002°, ensuring consistent performance across repeated cycles. Safety-related accuracy is specified at 0.09° for category 3 and 0.35° for category 4 applications, meeting strict positioning requirements in safety-critical systems. The encoder includes hardware pins for preset position setting, counting direction control, and factory reset functions, allowing flexible configuration without external software intervention.

Technical Characteristics

The AFS/AFM60S Pro delivers a maximum resolution of 262,144 steps per revolution (18-bit), with an additional 12-bit revolution count for total resolution up to 262,144 × 4,096. It operates within a supply voltage range of 4.5 to 30 V and includes reverse polarity and short-circuit protection. The encoder uses Gray code for error minimization during position transitions. Communication is via SSI with Sin/Cos support, enabling reliable signal transmission over long distances. The shaft is made from stainless steel, ensuring corrosion resistance and mechanical stability. Housing and stator coupling are constructed from aluminum die cast material, contributing to lightweight design and thermal management. All values apply under standard operating temperature conditions and require external evaluation units to achieve 99% diagnostic coverage.

Configuration and Integration

The AFS/AFM60S Pro is designed for straightforward integration into existing control systems through its SSI + Sin/Cos interface. It supports preset position setting via hardware pins, as well as configurable counting direction using dedicated pins. Factory reset and error memory readout functions allow maintenance personnel to verify system integrity and generate diagnostic reports. The encoder’s connection type is a male M12, 12-pin radial connector, ensuring secure mechanical attachment. All valid signals are only recognized after the specified time delay, ensuring signal integrity in noisy environments. For detailed configuration options specific to your machine or application, please consult your local SICK branch office.

Operating Environment

The AFS/AFM60S Pro is designed for operation within standard industrial environments and complies with EN ISO 13849-1 for safety-related performance. The specified accuracy values are valid at the operating temperature measuring point, assuming a diagnostic coverage of 99% achieved by an external evaluation unit. While the mission time is rated at 20 years under normal conditions (EN ISO 13849-1), actual operational life may be limited by bearing lifetime depending on application-specific loads and environmental factors. The encoder is built with robust materials—stainless steel shaft, aluminum housing—and is suitable for use in environments with moderate temperature variations and mechanical vibration. Performance remains stable under typical industrial conditions.

Industrial Applications

The AFS/AFM60S Pro is ideal for safety-critical motion control applications such as robotic arms, automated assembly lines, and machine tools where precise positioning and reliable feedback are essential. Its high resolution and safety-related accuracy make it suitable for use in systems requiring category 3 or 4 safety functions. The encoder’s compact size, durability, and proven performance in harsh environments support integration into a wide range of industrial automation systems. Applications include material handling equipment, packaging machines, and precision positioning systems where long-term reliability and minimal drift are required. Its ability to operate over a broad voltage range and withstand mechanical stress ensures consistent performance across diverse operating conditions.