6AG1321-7BH01-4AS0 Siemens S7-300

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Siemens 6AG1321-7BH01-4AS0 SIPLUS S7-300 SM 321 digital input module, 16DI 24 V DC

Part Specifications

Manufacturer: Siemens Product Family: SIPLUS S7-300 SM 321 HS Code: 85389091 EAN: 4042948506936 SKU: 6AG1321-7BH01-4AS0 Country of Origin: DE Product Weight: 0.246 KG Packaging Height: 5.10 CM Packaging Length: 15.10 CM Packaging Width: 12.90 CM
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Full 12-month warranty

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Product description

6AG1321-7BH01-4AS0 Siemens SIPLUS S7-300 SM 321 Digital Input

Reliable digital signal acquisition in challenging automation situations is engineered by the Siemens 6AG1321-7BH01-4AS0, a specialist SIPLUS S7-300 SM 321 input module. This SIPLUS variant is based on the 6ES7321-7BH01-0AB0 platform. Thanks to its improved conformal coating, it can withstand the damp conditions typical of industrial settings, as well as condensation and harmful airborne particles.

The module operates effectively within a range of 0 °C to +60 °C. It is designed to maintain consistent performance across various conditions while ensuring reliability.

Technical highlights:

  • 16 isolated digital inputs (DI) operating at 24 V DC
  • 20-pole connector for streamlined cabinet integration
  • Hardware interrupt support, enabling fast response to event-driven signals
  • Integrated diagnostics for proactive fault detection
  • Isochronous mode compatibility for synchronised, real-time applications
  • Input threshold of approximately 11.2 V between logic levels

The 6AG1321-7BH01-4AS0 has features that make it ideal for precise automation control. This is especially true in scenarios where real-time synchronisation and fast error detection are crucial.

Application potential:

This SIPLUS SM 321 module is versatile and can be deployed in:

  • Automated production lines requiring rapid digital input handling
  • Packaging and high-speed assembly systems, benefitting from isochronous timing
  • Infrastructure automation, where robust performance and diagnostics prevent downtime
  • General manufacturing and process industries, seeking Siemens-level reliability with added environmental protection

Build and lifecycle

Weighing just 0.246 kg, the 6AG1321-7BH01-4AS0 balances compactness with industrial-grade durability. It is part of Siemens’ long-standing S7-300 family, ensuring compatibility and ease of integration.

  • EAN: 4042948506936
  • Country of Origin: Germany
  • Commodity Code: 85389091

Lifecycle Note: This module will be obsolete from 1st October 2025, and customers are advised to secure replacement stock ahead of time.

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