6AG1321-7RD00-4AB0 Siemens S7-300

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Siemens 6AG1321-7RD00-4AB0 SIPLUS S7-300 SM 321 NAMUR input module, 4DI 24 V DC, PTB certified for Ex areas

Part Specifications

Manufacturer: Siemens HS Code: 85389091 EAN: 4042948544204 SKU: 6AG1321-7RD00-4AB0 Country of Origin: DE Product Weight: 0.317 KG Packaging Height: 5.00 CM Packaging Length: 13.00 CM Packaging Width: 15.00 CM
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Full 12-month warranty

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Product description

6AG1321-7RD00-4AB0 Siemens SIPLUS S7-300 SM 321 4DI NAMUR

The Siemens 6AG1321-7RD00-4AB0 is a SIPLUS S7-300 SM 321 digital input module. Its design prioritises use in settings subjected to media and in potentially dangerous areas. This SIPLUS version is built upon the base model 6ES7321-7RD00-0AB0. Condensation, dust, and corrosive environments are no match for its conformal coating.

This module complies with NAMUR standards (DIN 19234). Its main use is the transfer of signals from intrinsically safe circuits in Ex zones. In fields where potentially explosive environments are present, this guarantees dependability and safety.

Key features:

  • 4 isolated digital inputs (DI), 24 V DC
  • NAMUR/DIN 19234 compliance for intrinsically safe signal handling
  • Fully diagnostics-capable, enabling precise fault identification
  • Potential isolation ensures stable and interference-free operation
  • PTB certified, guaranteeing compliance with German and international standards for use in explosive areas

This makes the 6AG1321-7RD00-4AB0 one of the most robust options for digital input acquisition in safety-critical applications.

Application areas:

The SIPLUS SM 321 NAMUR module is particularly suited for:

Process industries (chemical, oil & gas, petrochemical) where Ex zones are common
Pharmaceutical plants, requiring stringent compliance and continuous monitoring
Utilities and energy sectors, where safety-certified input handling is essential
Heavy manufacturing environments exposed to moisture or dust
With its NAMUR functionality and tough SIPLUS construction, it can withstand harsh environments and strict regulations with ease.

Specifications

  • EAN: 4042948544204
  • Country of Origin: Germany
  • Commodity Code: 85389091
  • Weight: 0.3 kg

Lifecycle information

The 6AG1321-7RD00-4AB0 is set to be end-of-life service on October 1, 2025, as part of Siemens’ S7-300 portfolio. It is recommended that users in critical industries secure replacement stock. This will help avoid downtime or compliance issues after discontinuation.

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