What Is an Encoder with Open-Collector Output?
An encoder with open-collector output is a type of incremental encoder where the output stage can switch to ground but requires an external pull-up resistor. This design is commonly used in industrial automation, servo motors, and PLC systems, offering excellent compatibility with various logic levels and reduced signal interference in noisy environments.
Common Applications and Advantages
Open-collector output encoders are widely applied in:
Servo motor systems needing ABZ encoder signals
Systems with mixed signal standards (e.g., TTL or HTL to open-collector logic)
The open-collector configuration enables wiring flexibility, long-distance transmission, and integration into differential encoder systems.
Popular Models and Resolutions
Open-collector output is available across a range of encoder specifications, including:
1024 PPR encoder (popular for precision motion control)
500 PPR and 2048 PPR models
High-resolution options like 4096 PPR encoder or 10000 PPR encoder
Hollow shaft encoder and solid shaft incremental encoder formats
These encoders can be integrated with a hollow shaft structure, providing easy mounting and compact installation for rotary encoder applications.
Interface Compatibility and Encoder Types
These encoders often support:
A B Z encoder channels
3.3V to 24V logic levels
Optional compatibility with SSI, CANopen, Profinet, and Modbus via controller interfaces
Some incremental encoders also offer push-pull, line driver, and open-collector outputs in one configurable unit, such as a programmable incremental encoder.
Ideal for High-Performance Applications
Open-collector encoders are particularly suited for:
Automated packaging machinery
AGV robots and logistics automation
Textile and converting equipment
Industrial CNC servo drives
Advanced models like the 1213 BISS encoder, 1213 CANopen encoder, or 1213 bit multiturn absolute encoder also provide open-collector output options, especially in environments where flexible signal integration is crucial.
Hollow Shaft Incremental Encoder with Open Collector
One of the most popular configurations is the hollow shaft incremental encoder with open-collector output, offering:
Compact 40mm / 50mm / 58mm housing
Optional 1024 pulse encoder or 2048 pulse encoder resolution
Easy cable management and space-saving design
This type of encoder is perfect for retrofits or compact machinery.
Summary
If you're looking for a reliable, cost-effective, and versatile encoder with open-collector output, our range includes:
Both solid shaft and hollow shaft variants
Compatibility with various PLC and control systems
Explore our collection of incremental encoders with open-collector outputs, suitable for industrial-grade automation systems, CNCs, and servo applicati