PMCDIO64 - 64-Bit Digital I/O PMC Module TTL level compatible 64 Bit I/O PMC module, Byte selectable as input or output, Inputs latched to 33MHz PCI clock, Interrupt on change of state, Programmable watchdog, Front or rear I/O. PMCDIO32 - 32 Bit Opto-isolated digital I/O PMC module 32 Bit Opto-isolated I/O available in various factory specified combinations of inputs and outputs, programmable input de-bounce timer, Interrupt on change of state, Programmable watchdog timer with interrupt. PMCDIO32CC - 32 Bit Opto-isolated digital I/O Conduction Cooled PMC module Full conduction cooled 32 Bit Opto-isolated I/O with 16 inputs & 16 outputs, programmable input de-bounce timer, Interrupt on change of state, Programmable watchdog timer with interrupt. Extended temperature operation -40°C to +85°C.