QEH81M-00035 SSI Encoder 1:1 Replacement (ALT.:130-00035)

The QEH81M-00035 is an absolute multiturn rotary encoder designed for applications that require reliable position feedback over multiple revolutions with high data integrity. This model provides a resolution of 1024 steps per revolution combined with 4096 revolutions, delivering precise multiturn position information via an SSI interface with RS422 output levels. It is suitable for automation systems where deterministic communication and stable signal transmission are essential.

Our solution offers a customized 1:1 replacement for QEH81M-00035, fully matching the original mechanical interface, electrical characteristics, and functional behavior. The encoder features a ZB40 outer centering flange and a 20H7 hollow shaft with keyway, ensuring direct mechanical compatibility without any modification to the machine structure. Electrical parameters such as supply voltage range (11–27 VDC), SSI protocol timing, programmable code format, preset functions, and direction control are implemented according to the original specification.

This replacement encoder is engineered for industrial environments with a protection class of IP54 and a standard operating temperature range of 0 to 60 °C. It is well suited for machinery, material handling systems, and process automation applications where long-term stability and accurate multiturn feedback are required.

The custom manufacturing lead time is 4 weeks, making it a dependable solution for planned maintenance, retrofit projects, or system upgrades requiring precise functional equivalence.

Technical Data