Amazon.com: Introduction to programming a SIEMENS LOGO PLC eBook : Fattahzadeh, Seyedreza: Kindle Store
Siemens 6ES7 241-1CH32-0XB0 SIMATIC S7-1200, Communication Module cm 1241, RS422/485, 9 PIN SUB D (Female) Supports Message Based Freeport: Amazon.com: Industrial & Scientific