Available in Slim or All-In-One styles | CPU units are equipped with 10, 16, 20, 24, or 40 I/Os. Maximum of 264 I/Os can be configured on a single MicroSmart CPU Your choice of many expansion modules: AC/DC inputs, relay/transistor outputs, RTD/Thermocouple and Analog I/Os, and AS-interface Master communication module Standard RS232 port, optional plug-in RS485/RS232 port for data link or modem communications. Optional plug-in HMI module for monitoring, memory cartridge, and real-time clock and calendar cartridge Built in Modbus-CRC, PID and Ramp functions 4 built-in high speed counters, interrupt and catch inputs, and password protection Data link for up to 32 MicroSmart or other IDEC PLCs c-ULus, CE, TUV and Lloyds approved Approved for Class 1 Div 2 Hazardous Locations Compact and rugged housing | Easy programming using IDEC exclusive WindLDR software Available in starter kit packages to suit your budget Now available with 120V AC input and 24V DC All-in-One CPU