EY-IO 551: I/O module, digital outputs (open collector), modu551 
 
How energy efficiency is improved
SAUTER EY-modulo 5 technology: modular, fast and universal
 
Features
• Part of the SAUTER EY-modulo 5 system family
• 16 digital outputs
• Plug-in element for extending the modu525 automation station (AS)
• Power supply from modu525 AS
• Direct labelling on the front
• Can be equipped with a local operating and indicating unit