ModelSM321 Number of digital inputs:16Product  Description16DI,120V DC/230V AC; High immunity;stablePower consumption·From bus current consumption40mA·Power loss4.9WNumber of digital inputs16Cable Length (Shielded)1,000mCable Length (unshielded)600mInput voltage·Rate value120/230V AC·For "0" signal0~40V AC·For "1" signal85~264V AC·Frequency range47~63HzInput current16mAInput delay·From "0"  to "1",Min25ms·From "1"  to "0",Min25msFront connector20-pinInput type/Connection of 2-wire BERO sensorYesPermissible quiescent current2.0mAIsolation tested for contact·Between channel and backplane busYes·Per group between channelsYesThe status indicatesGreen LED each channelDimensions(WxHx D)(mm)40×125×120Order Number6ES7321-1FH00-0AA0We produce these substitute S7-200,300,Profibus Products.>>>>Can be produced with your brand and model number.<<<<