The I/O modules supported by the AH500 series CPU module are digital input/output modules, analog input/output modules, temperature measurement modules, network modules, motion control modules, and remote I/O modules. Apart from the standard communication ports on a CPU module, the CPU module does not equipped with other I/O functions. If users want to use I/O functions, they can select suitable modules according to the actual situation. Extension Module,32 DI,24VDC,MIL Connector,NPN/PNP Mix Mode Design