Siemens 6ES7422-1HH00-0AA0 SIMATIC S7-400 SM 422 16DO Relay 5-230V AC 5A PLC I/O Module

The Siemens 6ES7422-1HH00-0AA0 SIMATIC S7-400 SM 422 module provides 16 isolated relay outputs rated 5 A, switching up to 230 V AC or 60 V DC per channel. Relays are rated for 100,000 electrical switching cycles at AC-15/DC-13 duty and 3,000,000 mechanical cycles, with channels isolated in groups of 2. Switching capacity falls to 0.2 A at 125 V DC.

Technical Specifications

Selection Notes

Relay outputs make this module the choice when a load needs galvanic isolation across a wide voltage range – up to 230 V AC or 60 V DC on the same channel, unlike the solid-state DC-only or AC-only output modules. Rated for 100,000 switching operations at AC-15/DC-13 duty (3,000,000 mechanically), it fits loads that switch a few times per hour rather than continuously. Switching capacity drops with DC load voltage: 5 A at 30 V DC but only 0.2 A at 125 V DC, so check the actual DC load voltage before sizing the circuit. Channels are isolated in groups of 2, allowing different voltage classes across the 16 relays.