The L60AD4: One analog module per base, up to five combined in a single CPU stack. Power drawn from the backplane — no separate supply needed.
Not LJ71C24-R2 — different function
The other MELSEC-L expansion modules — LJ71E71-100 Ethernet, LD75P2 positioning — also sit on the same physical form factor but specific slot and addressing rules preclude a blind swap without reconfiguring the entire rack.