SIEMENS 6ES5420-4UA12 SIMATIC S5 digital input module
The Siemens 6ES5420-4UA12 is a legacy SIMATIC S5 digital input module used for signal acquisition in industrial automation environments. 6ES5420-4UA12 SIEMENS has been discontinued by Siemens and is now exclusively available as a spare part or refurbished unit through third-party automation vendors.



