The Siemens 6ES7131-7RF00-0AB0 is a SIMATIC electronic module designed for the ET 200iSP distributed I/O system. 

Model: 8 DI NAMUR

System Compatibility: ET 200iSP

Input Type: NAMUR sensors

Ex Protection: Ex ib (ia Ga) IIC T4 Gb, Ex ib [ia IIIC Da] IIC T4 Gb, Ex ib [ia] I Mb

Supply Voltage: 20.4V - 28.8V DC

Current Consumption: 80mA (typ.), 90mA (max.)

Power Loss: 1.1W (typ.)

Number of Digital Inputs: 8

Cable Length (shielded, max.): 500m

Mounting Type: Rail mounting, front mounting

Product Status: Active