Product Overview
When upgrading or replacing digital output modules in your SIMATIC S7-400 system, the Siemens 6ES7422-1BH11-0AA0 delivers proven performance and isolation. This SIMATIC S7-400 digital output SM 422 provides 16 isolated digital outputs, each rated for 24 V DC and 2 A continuous current. The Siemens 6ES7422-1BH11-0AA0 is designed to drive solenoid valves, contactors, and indicator lights in demanding industrial environments. Each output features clocked electronic short-circuit protection with a response threshold of 2.8 to 6 A, ensuring system integrity under fault conditions.
Technical Specifications
The Siemens 6ES7422-1BH11-0AA0 offers precise electrical characteristics for reliable operation. Key parameters are summarized below:
| Parameter |
Value |
| Load voltage rated value (DC) |
24 V |
| Permissible range lower / upper (DC) |
20.4 V / 28.8 V |
| Input current from load voltage (no load), max. |
30 mA |
| Input current from backplane bus 5 V DC, max. |
160 mA |
| Power loss, typ. |
5 W |
| Number of digital outputs |
16 |
| Short-circuit protection |
Yes (clocked electronic) |
| Output current for signal "1", rated |
2 A |
| Output current for signal "1", max. |
2.4 A |
| Output delay with resistive load (0→1 and 1→0) |
max. 1 ms |
| Switching frequency with resistive load, max. |
100 Hz |
| Cable length shielded / unshielded, max. |
1000 m / 600 m |
| Dimensions (WxHxD) |
25 mm x 290 mm x 210 mm |
| Weight, approx. |
600 g |
Real-World Applications
The Siemens 6ES7422-1BH11-0AA0 excels in applications requiring high-current 24 V DC output switching. In a chemical plant, it reliably controls actuator banks and process valves. Its fast switching capability (up to 100 Hz with resistive load) makes it suitable for sorting lines and packaging machinery. The isolation between groups of 8 channels prevents cross-talk in redundant control schemes, enhancing system safety.
Compatibility and Integration
The Siemens 6ES7422-1BH11-0AA0 integrates directly into standard SIMATIC S7-400 racks via the backplane bus. It is compatible with CPUs such as the 414-2, 416-2, and 417-4. The module draws up to 160 mA from the 5 V DC backplane bus and requires an external 24 V DC load supply. For redundant load control, two outputs from the same group can be paralleled.
Selection Guide and Purchasing Advice
When ordering the Siemens 6ES7422-1BH11-0AA0, verify that your S7-400 rack has an available slot and that your system power supply can accommodate the additional 160 mA backplane current plus load requirements. The front connector is ordered separately. This module is available from PLC Source PRO, your trusted supplier for industrial automation spares. For technical support, contact ubest101 with your system details.