Digital Input Module for 6ES7321-1BL00-0AA0 (321-1BL00-0AA0)

Replacement digital input module compatible with part number 6ES7321-1BL00-0AA0 (321-1BL00-0AA0). Designed for use in Siemens SIMATIC S7-300 PLC systems as a direct substitute for the original module. Suitable for repair, maintenance, or system upgrades — confirm fitment with your rack and configuration prior to purchase.