Siemens SIMATIC S7-200 CN Digital Input Module EM 221 for S7-22X, 16 DI, 24V DC
This Siemens digital input module, model 6ES7221-1BF22-0XA8, offers 16 discrete input channels suitable for interfacing with various sensors and switches in industrial automation systems, specifically designed for use with S7-22X CPUs.