What this module is for
The Omron B7A-T3E3-M is a PLC expansion module that operates on a 12/24VDC supply, designed to add I/O points to a compatible Omron PLC system.
No official successor or replacement is listed.
Compatibility and fit
As a PLC expansion module, the B7A-T3E3-M mounts into the backplane of an Omron PLC rack, typically in the B7A series or compatible CPU base units. The 12/24VDC supply voltage means it draws from the same field power rail as most standard I/O slices — no separate power supply needed for the module itself.