A rotary encoder is an electro-mechanical device that converts the angular position or motion of a shaft or axle into an electrical signal. These signals are used to determine position, direction, speed, or acceleration in automation systems.
Baumer Group, based in Switzerland, is a leading manufacturer of sensors and encoders known for precision, durability, and innovation in industrial applications.
📂 Types of Baumer Rotary Encoders
Baumer offers a comprehensive portfolio of rotary encoders, classified as follows:
1. Incremental Encoders
Output pulses relative to motion.
No absolute position memory after power loss.
Common models: EIL580, ITD, HOG, EIL510
Applications: Motor speed feedback, conveyors, wind turbines.
2. Absolute Encoders
Provide a unique position value for each shaft angle.
Retain position even after power loss.
Two types:
Single-turn: Measures within one rotation.
Multi-turn: Measures across multiple rotations using mechanical or electronic counters.
Common models: GEMAC, GMI5, MAGRES, HMG10, AMG10
Applications: Robotics, CNC machines, elevators, packaging machinery.
3. Magnetic Encoders
Use magnetic fields for position detection.
Robust in harsh environments (dust, oil, temperature extremes).
Example: MAGRES EAM series
4. Optical Encoders
Use light and photo-detectors for high-resolution feedback.
Suitable for applications needing precision and cleanliness.
5. Heavy-Duty Encoders
Designed for rugged environments (shock, vibration, dust, moisture).
High protection (IP67/IP69K) and high shaft loads.
Models: HOG series (e.g., HOG 10), HMG 10
Applications: Steel plants, wind turbines, mining, cranes.
📐 Baumer Encoder Model Naming Example
Model: EIL580P-SC10.5KN
EIL580: Series name
P: Pulse output type
SC10.5: Shaft diameter and flange type
KN: Electrical connection type (e.g., cable or connector)
🔍 Key Specifications to Consider
Parameter Options / Range
Resolution Up to 65, 536 pulses/rev (incremental); 18–30 bit (absolute)
Shaft type Solid shaft, hollow shaft, blind hollow shaft
Interfaces HTL, TTL (Incremental); SSI, BiSS, CANopen, Profibus, EtherCAT, IO-Link (Absolute)
Protection class Up to IP67/IP69K
Housing materials Aluminum, stainless steel, coated metal
Speed Up to 12, 000 RPM
Temperature range -40°C to +100°C (depending on model)
🔧 Connectivity & Interfaces
Industrial Protocols supported:
SSI (Synchronous Serial Interface)
BiSS-C (open-source digital interface)
CANopen / Profibus / EtherCAT / Profinet (for integration with PLCs)
IO-Link for smart sensor integration
🧰 Applications of Baumer Rotary Encoders
Automation systems
Robotics and AGVs
Electric motors and servo drives
CNC machines
Printing presses
Elevators and escalators
Steel, wind, mining industries (heavy-duty models)
✅ Advantages of Baumer Encoders
Swiss precision and reliability
Wide product range for every application type
Excellent environmental protection (IP67/IP69K)
Industry 4.0 ready (via IO-Link and fieldbus options)
High shock and vibration resistance
Easy integration with mechanical and electrical systems
📄 Documents Available
Technical datasheets
Wiring diagrams
CAD models (STEP/IGES)
Software tools for configuration (for some models)
