6ES7421-1EL00-0AA0

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The Siemens SIMATIC S7 Series Digital Input Module, part number 6ES7421-1EL00-0AA0, is a high-quality component designed for seamless integration into S7-400 PLC systems. This module is engineered to handle 32 isolated digital inputs, allowing for a broad range of signal processing tasks in industrial automation environments. With an input voltage rated at 120 V ac/dc and a current draw from the backplane bus of 5 V DC, max. 200 mA, it is well-suited for demanding applications.

The module's compact dimensions, 25 mm in width, 290 mm in height, and 210 mm in depth, make it an efficient choice for space-constrained installations. It also features a typical power loss of 6.5 W, ensuring energy-efficient operation. The input delay for standard inputs ranges from a minimum of 5 ms to a maximum of 25 ms, providing reliable and timely signal processing.

For enhanced system reliability, the module includes potential separation between channels and the backplane bus, with isolation tested at 1,500 V AC. This ensures robust performance and protection against electrical interference. The module's green LED indicators provide immediate diagnostics and status information, simplifying maintenance and troubleshooting.

Designed for versatility, the module can accommodate cable lengths up to 1,000 m when shielded and 600 m when unshielded, offering flexibility in system layout. It also supports the connection of 2-wire sensors, with a permissible quiescent current of up to 1 mA.

Overall, the Siemens 6ES7421-1EL00-0AA0 Digital Input Module is a reliable and efficient solution for expanding the capabilities of your industrial control systems, providing precise digital input handling with robust isolation and diagnostic features.
Specification Description
Part Number 6ES7421-1EL00-0AA0
Alternative Part Number 6ES74211EL000AA0
Manufacturer Siemens
Part Category PLC Systems
Part Family Simatic S7
Product Type Digital Input Module
Input Current 200 mA (from backplane bus 5 V DC, max.)
Operating Voltage 120 V ac/dc
Number of Digital Inputs 32
Input Voltage Type AC/DC
Rated Value (UC) 120 V; 47 ... 63 Hz
Signal "0" Voltage Range 0 to 20 V UC
Signal "1" Voltage Range 79 to 132 V AC; 80 to 132 V DC
Input Current for Signal "1" Typical 2 mA; 2 to 5 mA
Input Delay 5 ms to 25 ms for "0" to "1"; 5 ms to 25 µs for "1" to "0"
Cable Length Shielded, max. 1 000 m; Unshielded, max. 600 m
Connectable Encoders 2-wire sensor (permissible quiescent current, max. 1 mA)
Diagnostics Indication LED Status indicator digital input (green)
Potential Separation Between the channels, in groups of 8; Between the channels and backplane bus
Isolation Isolation tested with 1 500 V AC
Dimensions Width 25 mm, Height 290 mm, Depth 210 mm
Weight Approx. 600 g

What is the input voltage range for this Digital Input Module?

The input voltage range for the SIMATIC S7 Series Digital Input Module is rated at 120 V AC/DC, with a signal '0' recognised from 0 to 20 V UC and a signal '1' from 79 to 132 V AC or 80 to 132 V DC.

How many digital inputs does this module support?

The module supports 32 digital inputs, which can all be controlled simultaneously.

Can this module be used with 2-wire sensors?

Yes, the module can be connected to 2-wire sensors, with a permissible quiescent current of up to 1 mA.

What are the dimensions of this Digital Input Module?

The dimensions of the module are 25 mm in width, 290 mm in height, and 210 mm in depth.

What is the typical power loss for this module?

The typical power loss for the module is approximately 6.5 W.

Is there potential separation between the digital inputs?

Yes, there is potential separation between the channels and also between the channels and the backplane bus.

What is the maximum cable length that can be used with this module?

The maximum cable length for shielded cables is 1,000 meters and for unshielded cables, it is 600 meters.

How is the module isolated?

The module features isolation tested with 1,500 V AC to ensure safe operation and protection against electrical interference.

What type of diagnostics does the module provide?

The module provides diagnostics through an LED indicator that shows the status of the digital inputs.

What is the input delay for signals on this module?

The input delay for standard inputs is a minimum of 5 ms and a maximum of 25 ms for '0' to '1' transitions, and a minimum of 5 ms and a maximum of 25 µs for '1' to '0' transitions.

  • Monitoring and controlling industrial automation processes
  • Gathering input from sensors in manufacturing environments
  • Interfacing with control systems in conveyor systems
  • Input acquisition for process control in chemical plants
  • Data collection from environmental monitoring equipment
  • Integrating with safety interlock systems in machinery
  • Capturing signals from push buttons and switches in control panels
  • Reading input from level sensors in water treatment facilities
  • Managing inputs from temperature sensors in HVAC systems
  • Serving as part of a distributed control system in power plants

This content has been produced using multiple sources. EU Automation takes no responsibility for the accuracy of this information. Always consult the original equipment manufacturer for the most up to date instructions and information.

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