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Home Product 6ES5256-3AA21 Siemens SIMATIC S5 I/O Expansion Module Profibus DP Interface
S5 PLC

6ES5256-3AA21 Siemens SIMATIC S5 I/O Expansion Module Profibus DP Interface

6ES5256-3AA21 Module
Siemens Simatic S5 Module
Digital Expansion Module
6ES5256-3AA21
6ES5256-3AA21 Module is a Siemens Simatic S5 Digital Expansion Module designed for industrial automation systems. It provides scalable digital I/O expansion capabilities to enhance system flexibility and integration in PLC configurations.
Categories:Automation
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Product Description

The 6ES5256-3AA21 Module is a Siemens Simatic S5 Digital Expansion Module designed to enhance PLC systems with 16 digital inputs and 16 digital outputs, enabling scalable I/O configurations. It interfaces directly with up to 7 expansion modules via the Simatic S5 backplane, operating at 24V DC with a voltage tolerance of ±15%. This rugged module functions reliably in industrial environments within a temperature range of 0°C to 60°C, ideal for manufacturing, process automation, and machinery control. Its key strengths include high noise immunity, easy integration with S5 systems, and maintenance-free operation, though it lacks modern communication protocols like Ethernet. The module does not feature a screen, battery, or intrinsic sensor detection capabilities (N/A for these parameters). Optimized for legacy systems, it offers backward compatibility and plug-and-play installation.
Parameter Specification
Module Type Siemens Simatic S5 Module, 6ES5256-3AA21
Category Digital Expansion Module
Input Voltage 24 V DC ±15%
Nominal Current 200 mA (max)
Number of Channels 16 digital inputs or outputs (configurable)
Connection Type 40-pin front connector
Isolation Voltage 500 V AC (channel-to-logic)
Operating Temperature 0°C to 60°C
Protection Class IP20
Certification UL, CE, cULus
question:What payment methods do you accept?
answer:We accept T/T, PayPal, and other mainstream payment methods.
question:Can you provide upgraded or alternative models?
answer:Yes, upgraded or alternative models are available upon request.
question:Do you accept payment after delivery?
answer:No, payment must be settled before shipment as per standard policy.
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:What payment methods do you accept?
answer:We accept T/T, PayPal, and other mainstream payment methods.
question:Can you provide upgraded or alternative models?
answer:Yes, upgraded or alternative models are available upon request.
question:Do you accept payment after delivery?
answer:No, payment must be settled before shipment as per standard policy.
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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