About SIMATIC S7-400 6ES7421-1EL00-0AA0

The SIMATIC S7-400 6ES7421-1EL00-0AA0 is a standard-sized industrial electric device in grey color, suitable for various applications in the industrial sector. This PLC offers reliability and efficiency, making it an ideal choice for manufacturers, exporters, suppliers, and traders. The product comes with a new condition and a 1-year warranty, ensuring peace of mind for users.

Siemens SIMATIC S7-400 Digital Input Module SM 421

• Product Type: SM 421, 32 Digital Inputs, Isolated
• Rated Voltage: 120 V AC/DC
• Backplane Bus Supply: 5 V DC, max. 200 mA
• Power Loss: Typ. 6.5 W

Digital Inputs

• Number of inputs: 32

• Input characteristic: IEC 61131 Type 1

• Simultaneously controllable inputs: 32

• Input voltage: AC/DC, 120 V (4763 Hz)

• Signal range:

  • "0": 020 V

  • "1": 79132 V AC / 80132 V DC

• Input current:

  • "0" min: 0 mA, max: 1 mA

  • "1" typ: 25 mA

• Input delay:

  • 0 1: 525 ms

  • 1 0: 525 s

• Cable length:

  • Shielded: max 1000 m

  • Unshielded: max 600 m

Encoder Support

• 2-wire sensors: Yes

• Max quiescent current: 1 mA

Diagnostics

• LED indicators: Green status indicator for digital inputs

Potential Separation & Isolation

• Between channels: Yes, in groups of 8

• Between channels & backplane bus: Yes

• Isolation tested: 1500 V AC

Dimensions

• Width: 25 mm

• Height: 290 mm

• Depth: 210 mm

• Weight: 600 g

Technical Details