Siemens 6ES7422-5EH10-0AB0 Digital Output Module — Legacy Replacement. Siemens 6ES7422-5EH10-0AB0 is the exact manufacturer order number for a digital output module in the SIMATIC S7-400 portfolio. Siemens describes this exact reference as: SIMATIC S7-400, DIGITAL OUTPUT MODULE, SM 422, ISOLATED, 16 DO, 20 - 125V DC, 1.5A WITH DIAGNOSTICS 8 POINT PER COMMON. The verified manufacturer lifecycle record is PM500:Discontinued Product or end of PLM & Support.