SIEMENS 6ES7131-4BF00-0AA0 Input Module, ELEKTRON, ET200S, Digital, 8POINT, 24VDC, 15MM Width, 1 Unit PER Package: Amazon.com: Industrial & Scientific
SIEMENS 6ES7 132-4BD02-0AA0 SERIES ET200S, OUTPUT MODULE 4POINT DIG 6ES7 132-4BD02-0AA0 Series ET200S: Amazon.com: Industrial & Scientific
Automating with SIMATIC: Hardware and Software, Configuration and Programming, Data Communication, Operator Control and Monitoring: Berger, Hans: 9783895784590: Amazon.com: Books
Amazon.com: A2 PC USB Programming Cable Siemens Simatic S7-200 PLC S7-300 PLC S7-400 PLC Replaces 6ES7 972-0CB20-0XA0 Compatible Step7 MPI PC Adapter USB : Electronics
Siemens 6ES7131-4BD01-0AA0 ET 200S Digital Input Module 15mm 24VDC: Amazon.com: Industrial & Scientific