CS1W-BI103 is a 10-slot expansion I/O backplane for the Omron CS1 series PLC platform. It mounts up to ten I/O or special-function modules in a remote or local expansion rack. The backplane itself carries no active components — all slot addressing and data transfer is handled by the CPU rack's bus controller.
Slot count comparison — CS1W-BI102 vs CS1W-BI103
The CS1W-BI103 is a 10-slot expansion I/O backplane for the CS1 series. It is a functional alternative to the CS1W-BI102, with the same mounting pattern and bus interface.
Lifecycle and sourcing posture
The CS1W-BI103 carries a distributor lifecycle code of eol_hot (end-of-life), while the manufacturer lists it as Active. Source through an RFQ for confirmed availability.