24I/O, 100-240VAC, Relay Output Embedded Ethernet Port Embedded SD memory port Modbus TCP and RTU Embedded RS232C/RS485 user selectable Maximum 504 digital I/O Maximum 124 analog I/O Data Logging Web Server Functions Large programming and data memory cULus CE Class 1 Div 2 Certification Specifications IP Rating IP20 UL certification Yes TUV certification Yes CE marking Yes Hazardous Location Class I Div 2 Hardware Specifications Embedded Digital IO 24 SD Memory Slot true USB Port USB Mini-B Number of Ethernet Port 1 Embedded Analog IO 1 Embedded Serial Port 1 Number of Embedded Input 14 Digital Output Type Relay Electrical Specifications Operating voltage 100-240VAC Performance Specifications Internal relay 12400 Maximum Digital I/O Points 508 Data register 56000 Maximum Analog I/O Points 125 Maximum number of expansion modules 15 Timer 1024