Siemens 6ED10522HB000BA6 , LOGO! Logic Mod., 24RCo, 8DI, 4RO, MEM 200 Blocks, without Display: Electronic Components: Amazon.com: Industrial & Scientific
LOGO! Logic Module | SIMATIC Controllers | Siemens Global
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