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Home Product 6ES7421-7BH01-0AB0 SM 421 Siemens S7-400 Digital Input Module 32-Channel 24VDC PLC
SM 421 digital input module

6ES7421-7BH01-0AB0 SM 421 Siemens S7-400 Digital Input Module 32-Channel 24VDC PLC

SIMATIC S7-400 DI Module
32-Channel Digital Input
6ES7421-7BH01 Module
6ES7421-7BH01-0AB0
SIMATIC S7-400 DI Module 6ES7421-7BH01 is a 32-channel digital input module for high-density industrial automation systems, providing reliable signal acquisition and seamless integration with S7-400 PLC control setups. Compact design, high-performance input processing.
Categories:Automation
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Product Description

The SIMATIC S7-400 DI Module (6ES7421-7BH01-0AB0) is a 32-channel digital input module designed for high-density industrial automation systems. It integrates 32 isolated DC inputs (24 V DC nominal, 20.4–28.8 V operating range) with a 5 mA typical input current, enabling direct sensor and switch connectivity. Compatible with S7-400 systems, the 6ES7421-7BH01 Module supports standard front connectors for simplified wiring. It operates in 0–60°C environments, ideal for manufacturing, energy, and process industries requiring robust PLC solutions. While lacking built-in communication interfaces, it interfaces via the S7-400 backplane. Advantages include high reliability, surge protection, and easy scalability; limitations include no onboard diagnostics or power isolation. Battery, screen, and detection distance parameters are not applicable as it serves purely as an input interface.
ParameterSpecification
Module TypeSIMATIC S7-400 DI Module
Order Number6ES7421-7BH01-0AB0
Channels32-Channel Digital Input
Rated Voltage24V DC
Input Current4 mA per channel
IsolationOptical isolation between groups
Power Consumption2.5W typical
Connection TypeFront connector with screw terminals
Cable Length1000 m max (shielded)
Response Time0.1-20 ms configurable
Bus ConnectionVia S7-400 backplane
Operating Temp0°C to 60°C
CertificationCE, UL, cULus
question:Why can other suppliers find and provide discontinued models that you cannot offer?
answer:They may have remaining stock or use compatible alternatives. Verify authenticity and compatibility before purchasing.
question:Do you accept payment after delivery?
answer:We require advance payment or secure payment terms like LC for new clients to ensure mutual trust and transaction security.
question:Why are product labels removed upon receipt?
answer:Labels are occasionally removed to comply with regional regulations or protect supply chain confidentiality. Confirm specifications before use.
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 find and provide discontinued models that you cannot offer?
answer:They may have remaining stock or use compatible alternatives. Verify authenticity and compatibility before purchasing.
question:Do you accept payment after delivery?
answer:We require advance payment or secure payment terms like LC for new clients to ensure mutual trust and transaction security.
question:Why are product labels removed upon receipt?
answer:Labels are occasionally removed to comply with regional regulations or protect supply chain confidentiality. Confirm specifications before use.
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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