Product Overview
Applications
Two outputs can be switched in parallel for redundant control of a load, only when the outputs have the same load voltage.
The digital outputs can control a digital input.
Technical Summary
| Output type | 16 isolated digital outputs |
|---|---|
| Rated load voltage | 230 V; 120/230 V AC |
| Permissible load-voltage range | 79 V to 264 V |
| Permissible frequency range | 47 Hz to 63 Hz |
| Rated output current, signal "1" | 2 A |
| Output current range, signal "1" | 10 mA to 2 A |
| Response time, max. | 100 ms |
| Lamp-load switching capacity, max. | 50 W |
| Mounting-position load, up to 40 °C | 4 A; 6 A with fan assembly |
| Mounting-position load, up to 60 °C | 2 A; 5 A with fan subassembly; per 4 adjacent outputs |
Key Features
The SM 422 has 16 digital outputs with potential separation between channels and the backplane bus.
Rated load voltage is 230 V; the supplied voltage designation is 120/230 V AC.
Signal "1" output current is rated at 2 A, with a permissible range from 10 mA to 2 A.
Outputs have electronic, clocked short-circuit protection. After a short-circuit, reclosing under full load cannot be ensured.
Dimensions are 25 mm wide, 290 mm high and 210 mm deep; weight is approximately 800 g.
The product lifecycle is Announcement of product phase-out.
Frequently Asked Questions
What exact Siemens line item is this?
It is Siemens 6ES7422-1FH00-0AA0, a SIMATIC S7-400 SM 422 digital output module with 16 isolated digital outputs.
What load voltage and output current does it use?
Rated load voltage is 230 V; the supplied voltage designation is 120/230 V AC. Signal "1" output current is rated at 2 A, with a permissible range from 10 mA to 2 A.
Does it include short-circuit protection?
Yes. The outputs have electronic, clocked short-circuit protection; after a short-circuit, reclosing under full load cannot be ensured.
What mounting-position load limits apply?
For all mounting positions, the maximum is 4 A up to 40 °C, or 2 A up to 60 °C. With a fan assembly or fan subassembly, the stated values are 6 A or 5 A respectively; the 60 °C value is per 4 adjacent outputs.
What details should accompany a quotation request?
Include the requested quantity, destination, schedule context and any additional BOM lines for project quotation review.
