What it is and what it does in the rack
The Mitsubishi LD75P2 is a 2-axis positioning controller that drops into a MELSEC rack as a PLC expansion module, integrating coordinated axis motion control into the host programmable logic controller system.

Mitsubishi LD75P2, MELSEC series 2-axis positioning controller for PLC expansion modules, current lifecycle stage, 1.36 kg.
| Parameter | Value |
|---|---|
| Weight | 1.36 kgs |
The Mitsubishi LD75P2 is a 2-axis positioning controller that drops into a MELSEC rack as a PLC expansion module, integrating coordinated axis motion control into the host programmable logic controller system.
Both are Mitsubishi MELSEC PLC expansion modules in the same category, so the QD70P8 is the natural cross-shop candidate; the LD75P2 weighs 1.36 kg versus 1.03 kg on the QD70P8, which signals a different frame, not a same-footprint alternate.
No — same category does not mean interchangeable. The weight gap between the LD75P2 (1.36 kg) and the QD70P8 (1.03 kg) is large enough to indicate a different frame, so backplane mounting, axis count and any pre-wired connectors have to be reconciled against the original panel layout before substituting.