Product Description

SIEMENS 1P 6ES7 421-1BL01-0AA0 The SIEMENS 1P 6ES7 421-1BL01-0AA0 is a high-density SIMATIC S7-400 Digital Input Module (SM 421). It provides galvanic isolation and allows automated control systems to read digital status signals from field equipment like switches and proximity sensors. Siemens +4 Core Technical Specifications According to the official Siemens Support Data Sheet, the module features the following hardware parameters: Digital Inputs: 32 isolated channels grouped in a single block of 32. Input Voltage: 24 V DC (Rated). Input Current: Typ. 7 mA per input channel at Signal 1. Backplane Current: Max. 20 mA from the 5 V DC backplane bus. Power Loss: Typically consumes 6 W of power during operation. Input Delay: Configurable between 1.2 ms and 4.8 ms for signal stabilization. Dimensions & Weight: Measures 25 mm x 290 mm x 210 mm and weighs approximately 500 grams. Siemens +3 Purchasing Options & Industrial Availability Siemens officially initiated the product phase-out lifecycle for this module in late 2025. However, it remains widely available through specialized industrial automation distributors and local suppliers: www.industry-mobile-support.siemens-info.com +2 WiAutomation IN: Provides new units starting around ?30,276.76 (plus delivery) on WiAutomation IN. Aeliya Marine Tech: Retails new-condition modules at roughly ?37,372.99 with free delivery, accessible via AeliyaMarineTech.com. Auto2mation: Stocks factory-new modules listed near ?56,444.77, featured on Auto2mation.