SIMATIC S7-300. DIGITAL INPUT SM 321. OPTICALLY ISOLATED. 32 DI. 120V AC. 1 X 40 PIN
SIMATIC S7-300. DIGITAL MODULE SM 323. OPTICALLY ISOLATED. 8 DI AND 8 DO. 24V DC. 0.5A AGGREGATE CURRENT 2A. 1X20 PIN
SIMATIC S7-300. DIGITAL INPUT SM 321. OPTICALLY ISOLATED. 8 DI. 120V/230V AC. 1 X 40 PIN. WITH 1 POINT PER COMMON
SIMATIC S7-300. DIGITAL INPUT SM 321. OPTICALLY ISOLATED. 16DI. 24 V DC. 1 X 20 PIN