SIEMENS 6ES5521-8MB11 Description Description SIEMENS SIMATIC S5 SERIAL INTERFACE BASIC PROGRAMMING Related products SIEMENS 1FN1910-0AA20-1AA0 SIEMENS 1FK7042-5AK71-1FB0 SIEMENS 1FK6042-6AF71-1TB0 SIEMENS 1FK6032-6AK71-1TA0 SIEMENS 1FK7060-5AF71-1FH3 SIEMENS 1FK7044-7AF71-1EG0
