The LP2500 has two downstream RS-485 ports that each can support 32 downstream devices. 32 additional network SIOs can be added as well.
The LP1502 has a single downstream RS-485 port that can support 32 downstream devices. 32 additional network SIOs can be added as well.
The LP1501 supports a total of 16 downstream devices, up to 8 of these can be on the downstream RS-485 port and the remaining on the network.
Contact your OEM partner for more information on capabilities supported.