The Omron GRT1-OD4G-3 is a SmartSlice output module – four solid-state outputs on a DIN-rail mount, powered by 24 VDC. It lives inside a CJ, CS, or NJ series rack, not a CP1 series. The screw terminals make wiring straightforward, and the IP20 enclosure keeps it suited for clean indoor cabinets.
A common question is whether the GRT1-OD4G-3 swaps into a panel built around a CP1W-32ET or CP1W-32ET1. Short answer: no—these are different platforms. The GRT1 is a SmartSlice module for CJ/CS/NJ-series controllers; the CP1W modules belong to the CP1-series compact PLC. Even the bus architecture isn't shared. Also, output count: 4 vs 32. So if you're sourcing for a CP1-based design, the GRT1 won't drop in without changing the entire backplane and program.
Installation and environment notes
DIN rail mount.