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Home Product 6ES7421-1BL01-0AA0 Siemens S7-400 16Ch 24VDC DI Module PLC w/Diagnostics
SM 421 digital input module

6ES7421-1BL01-0AA0 Siemens S7-400 16Ch 24VDC DI Module PLC w/Diagnostics

Siemens S7-400 DI Module
6ES7421-1BL01-0AA0 Specs
SIMATIC 400 Digital Input
6ES7421-1BL01-0AA0
Siemens S7-400 DI Module 6ES7421-1BL01-0AA0 Specs: 32-channel 24V DC digital input for SIMATIC 400 automation systems with high-density signal integration.
Categories:Automation
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Product Description

The Siemens S7-400 DI Module (6ES7421-1BL01-0AA0) is a 32-channel digital input module within the SIMATIC 400 series, designed for industrial automation applications such as manufacturing, process control, and energy systems. This 24 VDC module supports direct integration with up to 21 expansion modules via the S7-400 backplane, enabling scalable configurations. Operating within a voltage range of 20.4–28.8 VDC and a temperature range of 0–60°C, it ensures reliable performance in harsh environments. Key 6ES7421-1BL01-0AA0 specs include surge protection, sensor diagnostics, and compatibility with industrial sensors. While lacking built-in communication interfaces, it interfaces with the central CPU through the backplane. Its modular design and high channel density simplify wiring, though initial setup may require expertise. Detection distance varies based on connected sensors but aligns with standard industrial proximity devices.
Parameter Specification
Module Type Siemens S7-400 DI Module
Part Number 6ES7421-1BL01-0AA0
Digital Inputs 32 channels
Input Voltage 120V AC / 230V AC
Input Current 7mA @ 120V AC, 12mA @ 230V AC
Isolation Optical isolation between backplane and inputs
Response Time 15ms (typical)
Backplane Current 50mA (5V DC)
Power Loss 4.5W
Isolation Voltage 1500V AC (test)
Certification UL, CE, cULus
Operating Temperature 0°C to 60°C
Mounting SIMATIC 400 Digital Input Rack
question:Why can other suppliers offer discontinued models you can't provide?
answer:They may use old stock or refurbished parts, risking quality. We prioritize reliability and avoid obsolete products.
question:Why should we purchase from your company?
answer:As Asia's leading industrial automation trader for 20+ years, we ensure quality, uphold reputation, with 85% repeat customers.
question:Do you accept payment after delivery?
answer:Standard terms require upfront payment, but flexible arrangements can be negotiated for trusted clients.
question:Can the company ensure stable product supply?
answer:Yes, we maintain long-term partnerships and strict inventory management.
question:Why is there a transaction fee?
answer:The fee covers payment processing and administrative costs for secure transactions.
question:Why can other suppliers offer discontinued models you can't provide?
answer:They may use old stock or refurbished parts, risking quality. We prioritize reliability and avoid obsolete products.
question:Why should we purchase from your company?
answer:As Asia's leading industrial automation trader for 20+ years, we ensure quality, uphold reputation, with 85% repeat customers.
question:Do you accept payment after delivery?
answer:Standard terms require upfront payment, but flexible arrangements can be negotiated for trusted clients.
question:Can the company ensure stable product supply?
answer:Yes, we maintain long-term partnerships and strict inventory management.
question:Why is there a transaction fee?
answer:The fee covers payment processing and administrative costs for secure transactions.
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