Overview
The Allen-Bradley 845H-SJHZ14-CNY2 is a Series A incremental optical encoder designed for precision feedback in industrial automation and motion control applications. This unit provides accurate position and velocity measurement critical for servo loops, variable frequency drive synchronization, and positioning systems. The encoder’s proven design and wide availability in surplus inventory make it a practical choice for maintenance, retrofit, and OEM applications requiring dependable feedback signals.
Key Features
- Series A optical incremental encoder with proven industrial reliability
- 500 counts per turn (CPT) resolution for accurate position feedback
- 5VDC powered design compatible with standard industrial voltage supplies
- Cannon 10-pin male circular connector for secure installation
- Made in the USA with robust construction for demanding environments
- Immediate availability from surplus inventory with same-day shipping options
Technical Specifications
The encoder operates on 5VDC at moderate current levels, suitable for direct PLC analog input modules or dedicated encoder interface cards. Its 500 CPT output provides sub-degree resolution for most motion control applications. The Cannon MS3102 connector standard ensures compatibility with standard automation wiring practices and allows quick disconnection for maintenance. Housing and optical components are designed for industrial temperature ranges typical of factory floor environments.
Typical Applications
- Servo motor position feedback and speed monitoring
- Variable frequency drive (VFD) synchronization and load sharing
- Conveyor and material handling system speed control
- Printing and labeling equipment registration
- Packaging machinery position verification
- Legacy automation system retrofits and upgrades
Compatibility & Replacements
Compatible With
- Allen-Bradley CompactLogix and ControlLogix PLC systems with analog input or encoder modules
- MicroLogix controllers equipped with high-speed counter inputs
- Standard industrial 5VDC power supplies
- Cannon MS3102 connector compatible wiring harnesses
- All servo drives supporting TTL/open-collector incremental encoder inputs
Replaces / Drop-In Replacement For
- 845H-SJHZ14-CMY2 (connector variant)
- 845H-SJDC14-CNY2 (alternative series)
- Other 845H Series A encoders with matching resolution requirements
Works With
- Studio 5000 Logix Designer with appropriate encoder function blocks
- RSLogix 5000 legacy programming platforms
- Open-collector and line-driver encoder signals
- Standard industrial automation networks via gateway modules
- Analog signal conditioning and counter input modules
