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Siemens SIMATIC S5 CP 530 communications processor, part number 6ES5530-7LA12.
Siemens SIMATIC S5 CP 535 communications processor for SINEC H1 (Industrial Ethernet), connecting S5-115U/H, 135U and 155U/H central controllers. Without 15V voltage submodule.
Siemens SIMATIC S5 CP 581 base module, part number 6ES5581-0EC12.
Siemens SIMATIC S5 CP 581 module, part number 6ES5581-0EE15.