The CJ1W-PH41U is a CJ-series analog I/O unit for CJ2H/CJ2M PLCs, carrying 4 analog inputs alongside 2 MOS FET relay outputs on a screw terminal block. It accepts voltage, current, T/C, and RTD signals across 4 inputs, letting one slot cover a mixed temperature and process panel without extra signal conditioning.
Lifecycle: this is the line that matters
The CJ1W-PH41U is flagged at lifecycle stage eol_hot, which is the only thing that should drive the procurement decision for a line-down or new-build spec today.
What to verify before you write the PO
For the field-side wiring, the I/O and relay terminations land on screw terminals, so strip length and torque follow the standard Phoenix-style cage practice used across the CJ I/O family — worth a quick check against the panel's existing terminal marking before the wireman commits to gland plate cutouts. The 2 MOS FET outputs are solid-state, not mechanical relays, so they switch quietly and have no contact bounce, but they also do not carry the inrush of a mechanical contactor output — any plan to drive a solenoid or lamp load directly should be re-checked against the MOS FET output's on-state rating before sign-off.