SIMATIC S7-400 Digital I/O Modules

The Siemens SIMATIC S7-400 Digital I/O Modules provide high-performance digital signal processing for large-scale industrial automation systems. Available in 4, 8, 16, 32, and 64-channel configurations, these modules enable reliable monitoring and control of sensors, switches, relays, contactors, and actuators, making them ideal for demanding manufacturing and process automation applications.

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⚙ SIMATIC S7-400 Digital I/O Modules – High-Density Industrial Signal Processing

The Siemens SIMATIC S7-400 Digital I/O Modules are designed for high-performance automation systems requiring reliable digital signal acquisition and control. Available in multiple channel densities, these modules provide flexible expansion options for large-scale industrial applications, ensuring dependable communication between field devices and the PLC.

  • Available in 4, 8, 16, 32, and 64-channel versions
  • Reliable digital input and output processing
  • Supports large-scale automation systems
  • Easy integration with S7-400 PLC racks
  • Designed for continuous industrial operation

▶ Flexible Digital Expansion

S7-400 Digital I/O Modules allow automation systems to expand according to application requirements.

  • Wide range of digital input and output configurations
  • Supports centralized and distributed architectures
  • Optimized for high-density I/O applications
  • Scalable design for future system growth
  • Reduces wiring complexity and cabinet space

◉ Reliable Industrial Performance

The modules ensure fast and accurate digital signal processing in demanding industrial environments.

  • Fast response times for critical automation tasks
  • Reliable operation under continuous workloads
  • Supports sensors, relays, valves, and actuators
  • Industrial-grade durability and stability
  • Suitable for mission-critical applications

💻 Easy Engineering & Diagnostics

S7-400 Digital I/O Modules integrate seamlessly into Siemens automation platforms.

  • Compatible with STEP 7 and TIA Portal
  • Integrated diagnostics and status monitoring
  • Simplified commissioning and maintenance
  • Hot-swappable options available on selected models
  • Reduces downtime and troubleshooting effort

✓ Why Choose Siemens S7-400 Digital I/O Modules?

  • High-density I/O capability
  • Reliable Siemens industrial quality
  • Flexible expansion for large automation systems
  • Long service life and dependable performance
  • Ideal for manufacturing, power, water, and process industries

🛒 Buy Siemens S7-400 Digital I/O Modules

Expand your automation system with genuine Siemens S7-400 Digital I/O Modules.

  • 4, 8, 16, 32, and 64-channel modules available
  • Technical support and product assistance available
  • Contact us for pricing and availability

Unique International supplies genuine Siemens SIMATIC S7-400 Digital I/O Modules and automation components with professional technical support and reliable service across Bangladesh.

Specification

📊 Key Technical Specifications

Product FamilySIMATIC S7-400 Digital I/O Modules
Compatible PLCSIMATIC S7-400 Series
Module TypesDigital Input (DI), Digital Output (DO), Digital I/O (DI/DO)
Input Voltage24 VDC, 120 VAC, 230 VAC
Output TypesTransistor, Relay
Channel Density4, 8, 16, 32, 64 Channels
Programming SoftwareSTEP 7 / TIA Portal
CommunicationIntegrated via S7-400 Backplane Bus
MountingS7-400 Rack Mounting
Protection ClassIP20

⚙ Available Siemens S7-400 Digital Input Modules (DI)

  • SM 421 DI 4x24VDC – 6ES7 421-1BL01-0AA0
  • SM 421 DI 8x24VDC – 6ES7 421-1BH02-0AA0
  • SM 421 DI 16x24VDC – 6ES7 421-1BL01-0AA0
  • SM 421 DI 32x24VDC – 6ES7 421-1FH00-0AA0
  • SM 421 DI 64x24VDC – 6ES7 421-7DH00-0AB0

◉ DIGITAL OUTPUT MODULES (DO)

  • SM 422 DO 4x24VDC – 6ES7 422-1BH11-0AA0
  • SM 422 DO 8x24VDC – 6ES7 422-1BH01-0AA0
  • SM 422 DO 16x24VDC – 6ES7 422-1BL00-0AA0
  • SM 422 DO 32x24VDC – 6ES7 422-1FH00-0AA0
  • SM 422 DO 64x24VDC – 6ES7 422-7BL00-0AB0

● DIGITAL I/O COMBINATION MODULES (DI/DO)

  • SM 423 16DI / 16DO – 6ES7 423-1BL00-0AA0
  • SM 423 32DI / 32DO – 6ES7 423-1FH00-0AA0

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