AMG81S29Z0 SSI Encoder with 29-Bit Multiturn Scaling

For AMG81S29Z0, EncoderWorks can provide a custom compatible replacement solution for SSI absolute multiturn feedback systems where the key checks are 29-bit SSI word length, 13-bit singleturn scaling, 16-bit multiturn rollover, and IP55 installation limits. This version must be separated from AMG81S25Z0, because the controller may expect a longer multiturn range and a different absolute word structure. Typical production lead time: 15 working days.

This model belongs to the AMG 81 absolute encoder series with EURO flange B10 and ø11 mm solid shaft. In the AMG81S29Z0 configuration, “S” defines the SSI interface, “29” defines 13-bit singleturn plus 16-bit multiturn position, and “Z0” means without additional incremental output. Replacement work should focus on SSI clock/data timing, controller-side bit length, Gray-code interpretation, multiturn count behavior, shielded wiring, shaft load, and enclosure suitability.

System Limits

The main system limit is SSI timing and word length. The controller must read the encoder with the correct clock frequency, 29-bit data structure, and wait period. If the SSI input is configured for a 25-bit word, a 13-bit singleturn word, or a different sampling window, the position value may shift, freeze, or appear stable but offset from the real axis position.

The second limit is 16-bit multiturn scaling. This configuration combines 8192 steps per revolution with up to 65536 revolutions. A replacement should be tested through one full shaft revolution and across multiple turns, because the singleturn value can look correct while the multiturn count or travel scale is still wrong.

The installation limit is the ø11 mm solid shaft, EURO flange B10, and IP55 protection class. Coupling misalignment, axial preload, radial force, poor shielding, or exposure beyond the enclosure rating can reduce reliability, especially near inverter, motor, brake, or contactor wiring.

Wiring & Installation

Before removing the existing encoder, record the SSI clock and data wiring, controller word length, clock frequency, wait time, Gray-code setting, supply voltage, shield connection, and mechanical zero position. The replacement should be checked against the controller’s SSI input configuration before startup.

After installation, confirm stable SSI communication and correct position reading from the controller display. Then test direction, zero alignment, one full shaft revolution, and multiturn counting across several turns or the required travel range.

Custom Compatible Solution

EncoderWorks can configure the replacement around the installed SSI multiturn system:

• Match SSI clock/data behavior, 29-bit word length, wait time, and controller-side sampling
• Verify 13-bit singleturn, 16-bit multiturn, Gray-code reading, direction, and zero alignment
• Adapt the EURO flange B10, ø11 mm solid shaft, M23 or bus-cover connection, and mounting requirement
• Review shield grounding, cable routing, SSI receiver margin, IP55 exposure, and shaft coupling load

Key Data