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6ES7421-1BL01-0AA0 Siemens S7-400, SM 421 DIGITAL INPUT MODULE
Digital Output Module OPTIC. ISOLATED, 32 DO, 24V DC, 0.5A
SIMATIC S7-400, FM 450-1 FUNCTION MODULE F. COUNT.FUNCT. WITH 2 CHANNELS INCL. CONFIG.
CP 440-1 COMMUNICATIONS MODULE