Tejgaon, Dhaka-1215, Bangladesh | sales@uniqueintsg.com | +8801815-944073
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.
- Contact: +8801815944073
- Mail: sales@uniqueintsg.com
⚙ 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 Family | SIMATIC S7-400 Digital I/O Modules |
| Compatible PLC | SIMATIC S7-400 Series |
| Module Types | Digital Input (DI), Digital Output (DO), Digital I/O (DI/DO) |
| Input Voltage | 24 VDC, 120 VAC, 230 VAC |
| Output Types | Transistor, Relay |
| Channel Density | 4, 8, 16, 32, 64 Channels |
| Programming Software | STEP 7 / TIA Portal |
| Communication | Integrated via S7-400 Backplane Bus |
| Mounting | S7-400 Rack Mounting |
| Protection Class | IP20 |
⚙ 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









