What this PLC is and where it fits
The CP1E-N40DT1-D is a 24 VDC-powered PLC from Omron's CP1E series, carrying 24 digital inputs and 16 solid-state outputs. Its 8K-word memory and expandability to 40 modules across 3 racks make it suited for medium-scale machine control where you need a mix of fast transistor outputs and room for analog or communication add-ons. The RS-232C port handles programming and basic serial links; option card slots let you add Ethernet, DeviceNet, or additional serial ports without swapping the base unit.
Sourcing reality — discontinued
This part is discontinued. Omron no longer manufactures the CP1E-N40DT1-D, so new units are only available through surplus or broker channels. If you're filling a BOM or replacing a failed unit in an existing panel, expect to source from the secondary market. There is no official direct replacement from Omron listed in the lifecycle data; the closest functional sibling is the CP1E-N40DT1-A, which shares the same I/O count and solid-state outputs but runs on 100–240 VAC instead of 24 VDC — that means a power supply swap if you're retrofitting a panel wired for 24 VDC.
Physical and compliance notes
Weighs 1.5 lbs (680.4 g), mounts on DIN rail or chassis. Approved for CE, cULus, Lloyd, and NK — the last two cover marine and industrial applications where classification society acceptance is required. The battery backup feature retains program and data memory during power loss, which is standard for the CP1E series.