FRONT CONN. MODULE W. 4X16-PIN IDC-CONNECTION FOR DIGITAL 32 I/O MODULES OF S7-1500 POTENTIAL SUPPLY VIA SCREW TERMINAL, Manufacturer-ID: 6ES7921-5AB20-0AA0
FRONT CONNECTOR MODULE W. 4X16 POLE IDC-CONNECT. FOR ANALOG 40 POL. I/O MODULES OF S7-1500 POTENTIAL SUPPLY VIA INFEED ELEMENT, Manufacturer-ID: 6ES7921-5AK20-0AA0
FRONT CONNECTOR MODULE W. 1X50 POLE IDC-CONNECT. FOR DIGITAL 32 I/O MODULES OF S7-1500 POTENTIAL SUPPLY VIA PUSH-IN TERMINALS, Manufacturer-ID: 6ES7921-5CH20-0AA0