The Schneider Electric PowerLogic METSEPM89M2600 is an I/O expansion module intended as an optional add-on for the PM8000 power-meter line, not a standalone controller. Channel budget is fixed at 6 digital inputs paired with 2 Form C relay outputs, which sets the wiring pattern the panel-builder will have to terminate on the back of the meter. The package is a single unit per order code and is built to a 22 mm wide × 90.5 mm tall × 90.5 mm deep footprint, so it consumes one slim DIN-rail slot alongside the host meter rather than a full-width bay.
An IP30 rating per IEC 60529 keeps the module suitable for cabinet interiors behind a door — it is not a field-mount device and should not be specified for an open gland-plate environment.