About SIMATIC S7-400 Digital Output SM 422 Isolated 32 DO 24 V DC, 0.5 A

SIMATIC S7-400 Digital Output SM 422The SIMATIC S7-400 Digital Output SM 422 is an isolated 32-channel digital output module for the S7-400 series. It features: - 32 isolated digital output channels- 24 V DC output voltage- 0.5 A output current- Galvanic isolation for reliable operation- Compact design for space-saving installation Key Specifications: - Output type: Digital- Number of channels: 32- Output voltage: 24 V DC- Output current: 0.5 A- Isolation: Galvanic- Compatibility: S7-400 series

Data Sheet: 6ES7422-1BL00-0AA0

SIMATIC S7-400 Digital Output Module SM 422
Isolated 32 DO | 24 V DC | 0.5 A

Supply Voltage

• Load voltage L+:

  • Rated value (DC): 24 V

  • Permissible range: 20.4 V to 28.8 V

Input Current

• From load voltage L+ (without load), max: 30 mA

• From backplane bus 5 V DC, max: 200 mA

Power Loss

• Typical: 4 W

Digital Outputs

• Number of digital outputs: 32

• Short-circuit protection: Yes (clocked electronically)

  • Response threshold (typ.): 0.7 1.5 A

• Limitation of inductive shutdown voltage: 27 V

• Controlling a digital input: Yes (possible)

Switching Capacity

• Lamp load, max: 5 W

Load Resistance Range

• Lower limit: 48

• Upper limit: 4 k

Output Voltage

• Signal 1, min: L+ (0.3 V)

Output Current

• Signal 1 rated value: 0.5 A

• Permissible range: 5 mA to 0.6 A

• Signal 0 residual current, max: 0.3 mA

Output Delay (Resistive Load)

• 0 1: max 1 ms

• 1 0: max 1 ms

Parallel Switching

• Uprating: Yes (same group only)

• Redundant load control: Yes (same group only)

Switching Frequency

• Resistive load, max: 100 Hz

• Inductive load, max: 0.5 Hz

• Inductive load (IEC 60947-5-1 DC13):

  • 2 Hz at 0.3 A

  • 0.5 Hz at 0.5 A

• Lamp load, max: 10 Hz

Total Current per Output Group

• Up to 40C: 4 A

• Up to 60C: 2 A (8 adjacent outputs each)

Cable Length

• Shielded: max 1000 m

• Unshielded: max 600 m

Diagnostics / Status

• Diagnostics function: No

Potential Separation

• Between channels: No

• Between groups: 32-channel grouping

• Between channels and backplane bus: Yes

Isolation

• Tested with: 500 V AC / 707 V DC

Dimensions

• Width: 25 mm

• Height: 290 mm

• Depth: 210 mm

Weight

• Approx.: 600 g

Technical Details