Pulscale SM25NA Encoder is a high‑resolution rotary encoder used to convert angular motion into digital signals for precise position control in industrial automation. Common failure modes reported for this model include loss of output signals due to broken or frayed wiring, contact degradation on the signal contacts, and internal component failure such as damaged ICs or decoupling capacitors. For a first‑check diagnostic: verify that power (typically 5 V or 12 V depending on configuration) is present at the encoder terminals; inspect all cable connections for continuity and physical damage; and review any error logs from the host controller for “encoder signal lost” or related fault codes.[oss-gpt-20b]