SIEMENS S7-1500,PLC DIGITAL, INPUT ,MODULE SM521(6ES7521-1BH50-0AB0)Product Name: Siemens S7-1500 PLCBrand Name: Siemens Model: 6ES7521-1BH50-0AB0Power Supply: 24V DC Digital Input: 08 (24V DC) Digital Output: 04 (Relay)Origin: GermanyCondition: NewWarranty: 01 yearsProgramming Software:Tia (Total Integrated Automation)Programming Cable:LAN (Local Area Network)User Manual:Data Sheet Link...