Invertek OPT-2-BNTIP-IN Communication Module, Bacnet IP Plug-in Interface, 50 x 52 x 22mm (HWD), Optidrive P2 Communication Interface $372.24 Select
Invertek OPT-2-CANIO-IN External Remote I/O Interface Expansion Module with CANOpen, DIN Rail Mounted, Remote I/O Interface, 90 x 72 x 59mm (HWD), Optidrive P2 Options $277.20 Select