The Jensen CT3168 is a discontinued AC output module designed for PLC and industrial control systems, providing 16 output channels on a 31‑pin interface. Common failures include burned or tripped output relays, degraded MOSFETs or IGBT drivers, and internal fuse blowouts due to overcurrent or short circuits; these often manifest as intermittent or permanently disabled outputs and may trigger error codes in the host PLC. Initial checks should verify that the module receives proper line voltage (48 V DC or 24 V depending on configuration), inspect for visible burn marks or blown fuses, and test each output channel with a multimeter or oscilloscope to confirm continuity and correct switching behavior.[oss-gpt-20b]