• Siemens 6ES5421-8MA12
  • Siemens 6ES5421-8MA12
  • Siemens 6ES5421-8MA12
1 3

Siemens 6ES5421-8MA12 Simatic S5 Digital Input Module

Siemens 6ES5421-8MA12 Simatic S5 Digital Input Module

Description

The Siemens 6ES5421-8MA12 is a digital input module engineered for the Simatic S5-090, S5-095, and S5-100 automation families. This 8-channel module is designed to interface field-level sensors, switches, and proximity...

22 people are viewing this right now

Availability: Low stock: 6 left

SKU: 6ES5421-8MA12
Vendor: Siemens
Category: Digital Input Module
Related Series:

Shipping & Returns

Reliable Worldwide Delivery

  • Carriers: Shipped via DHL, FedEx, UPS, or USPS.
  • Dispatch: Orders processed in 1-2 business days and dispatched within 3-5 business days.
  • Tracking: Full tracking details provided via email upon shipment.

30-Day Money-Back Guarantee

  • Guarantee: 30-day return window for in-stock, factory-sealed products.
  • Condition: Items must be unopened, unused, and in original packaging.
  • Authenticity: We guarantee 100% original and authentic hardware.

Need more details? Read our fullShipping PolicyandRefund Policy.

Authenticity & Warranty

  • Genuine Guarantee: We supply only 100% original, brand-new, and factory-sealed industrial automation parts.
  • Full Coverage: Every component is backed by a 12-month comprehensive warranty from the date of purchase.
  • Traceability: All products come with original factory documentation and accessories for full industrial compliance.

Technical Support & Sourcing

  • Expert Assistance: Our technical team provides free consultation to help you verify compatibility for DCS and PLC systems.
  • Rare Part Sourcing: Specializing in obsolete and hard-to-find components from Allen-Bradley, Siemens, ABB, HIMA, and more.
  • Bulk Inquiries: Contact us at pambo@5gplc.com for volume pricing or customized project quotes.
View full product details

Description

The Siemens 6ES5421-8MA12 is a digital input module engineered for the Simatic S5-090, S5-095, and S5-100 automation families. This 8-channel module is designed to interface field-level sensors, switches, and proximity devices with the central controller, converting DC field signals into reliable binary logic for processing. It is specifically optimized for applications requiring compact, high-density I/O, such as discrete manufacturing, automated assembly, and material handling systems.

Features

  • 8-channel digital input configuration for high-density signal acquisition.
  • Native integration with Simatic S5 backplane architectures.
  • Integrated RC filtering to mitigate contact bounce and high-frequency EMI.
  • Low power consumption design, drawing minimal current from the backplane bus.
  • Standardized 24 VDC input logic suitable for common industrial sensor interfaces.

Applications

This module is frequently utilized in small-to-medium scale automation tasks including:

  • Automated assembly line status monitoring.
  • Material handling and conveyor control systems.
  • Water treatment facility process instrumentation.
  • General discrete manufacturing logic control.

Technical Specifications

Model 6ES5 421-8MA12
Number of Inputs 8 channels
Input Voltage 24 VDC
Signal Logic Type 1
Input Current 7 mA typical at 24 VDC per channel
Power Consumption 0.5 W max (from backplane)
Operating Temperature 0 to 60 deg C
Storage Temperature -40 to 70 deg C

Installation Guidelines

  • Ensure the PLC rack power is disconnected before installing or removing the module to prevent electrical damage.
  • Verify that the module is correctly seated in the backplane slot to ensure reliable ribbon connection.
  • Route signal wiring away from high-voltage power cables and sources of heavy electromagnetic interference to maintain signal integrity.
  • Ensure the ambient operating temperature remains within the specified 0 to 60 deg C range to prevent thermal degradation.
  • Use appropriate shielded cabling for field inputs to minimize noise pickup in high-EMI environments.

FAQ

Does this module require external power for the inputs?

The 6ES5421-8MA12 typically utilizes the 24 VDC supply provided through the system backplane or common field power; please refer to your specific S5 CPU rack wiring diagram for exact power distribution requirements.

Is this module compatible with S5-115U systems?

No, this module is specifically designed for the Simatic S5-090, 095, and 100 series. It is not intended for use in the S5-115U or higher-tier rack systems.