About SIMATIC S7-400, digital output SM 422, isolated 16 DO

SIMATIC S7-400 Digital Output SM 422The SIMATIC S7-400 Digital Output SM 422 is an isolated 16-channel digital output module for the S7-400 series.Key Features: - 16 isolated digital output channels- Galvanic isolation for reliable operation- Compact design for space-saving installation- High-performance output for demanding applicationsKey Specifications: - Output type: Digital- Number of channels: 16- Isolation: Galvanic- Compatibility: S7-400 series 

Data Sheet 6ES7421-1FH20-0AA0

SIMATIC S7-400, Digital Input SM 421 Isolated 16 DI; UC 120/230V Inputs according to IEC1131-2 Type 2

Input Current

• From backplane bus 5 V DC, max. 80 mA

Power Loss

• Power loss, typ.: 12 W

Digital Inputs

• Number of digital inputs: 16

• Input characteristic according to IEC 61131 Type 2

• Number of simultaneously controllable inputs: 16

Input Voltage

• Type of input voltage: AC/DC

• Rated value (UC): 230 V; 120/230 V UC (47 63 Hz)

• For signal "0": 0 to 40 V AC / -40 to +40 V DC

• For signal "1":

  • 74 to 264 V AC

  • 80 to 264 V DC

  • 80 to 264 V

Input Current

• For signal "0", min.: 0 mA (AC: 0 mA; DC: 0 mA)

• For signal "0", max. permissible quiescent current:

  • 6 mA AC

  • 2 mA DC

• For signal "1", typical:

  • At 120 V: 10 mA AC, 1.8 mA DC

  • At 230 V: 14 mA AC, 2 mA DC

Input Delay (Rated Input Voltage)

• "0" "1", max.: 20 ms (AC: 20 ms; DC: 15 ms)

• "1" "0", max.: 30 ms (AC: 30 ms; DC: 25 ms)

Cable Length

• Shielded, max.: 1000 m

• Unshielded, max.: 600 m

Encoder

• Connectable encoders: 2-wire sensor Yes

  • Permissible quiescent current: 5 mA AC

Interrupts / Diagnostics / Status

• Diagnostics function: No

• Diagnostics LED: Status indicator digital input (green) Yes

Potential Separation

• Between channels: Yes

• Between channels (groups of 4): Yes

• Between channels and backplane bus: Yes

Isolation

• Isolation tested with: 1500 V AC

Dimensions

• Width: 25 mm

• Height: 290 mm

• Depth: 210 mm

Weight

• Approx.: 650 g 

Technical Details