Product Introduction
The Siemens 6ES7422-1HH00-0AA0 is a digital output SM 422 module designed for the SIMATIC S7-400 family. This unit provides 16 isolated relay outputs with a rated current of 5 A per channel, supporting load voltages from 5 V DC to 230 V AC. Its robust construction ensures reliable switching for demanding industrial applications. As part of the S7-400 system, this module offers seamless integration and exceptional longevity, making it a cost-effective choice for both new installations and upgrades.
Technical Specifications Breakdown
Key performance parameters of the 6ES7422-1HH00-0AA0 ensure dependable operation in harsh environments:
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Supply Voltage: Load voltage L+ rated 60 V DC (range 1-60 V DC); Load voltage L1 rated 230 V AC (range 2-264 V AC).
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Output Current: Each channel delivers 5 A at signal '1', with a minimum load current of 11 mA for reliable switching.
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Switching Frequency: Up to 10 Hz with resistive load, 1 Hz with inductive or lamp loads, and 20 Hz mechanical.
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Total Current per Group: Up to 40 °C, max 10 A (with fan subassembly); up to 60 °C, max 5 A (10 A with fan).
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Relay Life: 100,000 operating cycles (AC-15/DC-13), 3,000,000 mechanical cycles.
These specs highlight the module's capacity to handle high-current loads while maintaining isolation between channels and the backplane bus.
Industry Applications
The 6ES7422-1HH00-0AA0 excels in applications requiring high-current relay switching, such as motor starters (NEMA size 5), valve actuators, and conveyor systems. For example, in a cement plant, this module can directly control large AC motors up to 230 V AC with its 5 A relay contacts, reducing the need for external contactors. Its isolated design minimizes interference between channels, crucial for parallel switching in redundant control setups.
Maintenance & Reliability
With no diagnostic function, the 6ES7422-1HH00-0AA0 relies on its mechanical robustness. The relay outputs are rated for 100,000 electrical cycles, but mechanical life exceeds 3 million operations. To maximize ROI, schedule periodic visual inspections of the green status LEDs per channel. Operate within the specified temperature range (up to 60 °C with fan) to avoid premature wear. Its 700 g weight and compact dimensions (25 x 290 x 210 mm) allow easy replacement without disturbing adjacent modules.
Selection Guide & Purchasing Advice
Before purchasing the Siemens 6ES7422-1HH00-0AA0, verify your S7-400 backplane compatibility and load voltage requirements. This module requires up to 1 A from the 5 V DC backplane bus. For high-temperature environments, consider ordering the optional fan subassembly to maintain full 10 A per group. For reliable supply, trust PLC Source PRO (available at ubest101.myshopify.com) to provide genuine Siemens modules with traceable documentation.