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6ES7421-1FH20-0AA0

Siemens 6ES7421-1FH20-0AA0 S7-400 SM 421 16 DI UC

In stock (27 units), ready to be shipped

  • Manufacturer: Siemens

  • Product No.: 6ES7421-1FH20-0AA0

  • Product Type: Digital Input Module

  • Product Origin: DE

  • Payment:T/T, Western Union

  • Weight: 650g

  • Shipping port: Xiamen

  • Warranty: 12 months

30-Day Return Policy · 12-Month Warranty
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Description

Siemens 6ES7421-1FH20-0AA0 SIMATIC S7-400 SM 421 Digital Input Module

Siemens 6ES7421-1FH20-0AA0 is a SIMATIC S7-400 SM 421 digital input module with 16 isolated UC 120/230V inputs. Features IEC 61131-2 Type 2 characteristic, potential separation between channels in groups of 4, and 1500 VAC isolation. Weight approximately 650 g.

Key Specifications

Parameter Value
Article No. 6ES7421-1FH20-0AA0
Product Type Digital Input Module SM 421
Number of Inputs 16
Input Voltage Type AC/DC (UC)
Rated Value 120/230V UC (47-63 Hz)
Input Characteristic IEC 61131 Type 2
Backplane Current (5V) 80 mA max
Power Loss 12W typical
Weight Approximately 650 g

Input Specifications

Parameter Value
Signal "0" Voltage 0-40V AC / -40 to +40V DC
Signal "1" Voltage 74-264V AC / 80-264V DC / -80 to -264V
Input Current "1" (120V) 10 mA AC / 1.8 mA DC
Input Current "1" (230V) 14 mA AC / 2 mA DC
Input Delay 0 to 1 20 ms AC / 15 ms DC max
Input Delay 1 to 0 30 ms AC / 25 ms DC max

Isolation & Cable Length

Parameter Value
Channel Separation Yes, in groups of 4
Channels to Backplane Yes
Isolation Test Voltage 1500 VAC
Cable Length (Shielded) 1000 m max
Cable Length (Unshielded) 600 m max

Dimensions

Parameter Value
Width 25 mm
Height 290 mm
Depth 210 mm

Features

  • 16 simultaneously controllable inputs
  • 2-wire sensor connectable with max 5 mA quiescent current
  • Status indicator LED per digital input (green)
  • No diagnostics function

FAQs

Q1: What input voltage does the 6ES7421-1FH20-0AA0 support?
A1: UC 120/230V AC/DC at 47-63 Hz.

Q2: How are the channels isolated?
A2: Potential separation between channels in groups of 4, tested at 1500 VAC.

Q3: What is the maximum cable length?
A3: 1000 m shielded, 600 m unshielded.

Product Resources

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🏷️ Tags: Digital Input Module Siemens

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