Siemens Simatic M7-400 Reference Manual page 209

4.23 Digital Output Module SM 422;
DO 16
Characteristics
The SM 422; DO 16
• 16 outputs, isolated in groups of 1
• 2 A output current
• Rated load voltage 20 VAC to 120 VAC
• Group error display for internal faults (INTF) and external faults (EXTF)
• Programmable diagnostics
• Programmable diagnostic interrupt
• Programmable substitute value output
S7-400, M7-400 Programmable Controllers Module Specifications
A5E00069467-07
20-120 VAC/2 A; (6ES7422-5EH00-0AB0)
20-120 VAC/2 A has the following features:
Digital Modules
4-87