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Foundation Unit for SIMATIC S5-135U Expansion Racks
The Siemens 6ES5581-1EA11 basic module serves as the core interface unit for S5-135U expansion rack systems. This module manages power distribution and bus communication for up to 12 I/O modules in remote configurations. It works alongside the central controller to expand system I/O capacity.
Technical Specifications
| Parameter | Specification |
|---|---|
| Manufacturer | Siemens |
| Model | 6ES5581-1EA11 |
| Series | SIMATIC S5 |
| Product Type | Basic Module (BM) for Expansion Rack |
| Compatible Controllers | S5-135U and S5-155U central racks |
| Module Slots Supported | Up to 12 |
| Power Distribution | 5V DC and 24V DC to all slots |
| Interface | Expansion bus connector |
| Communication Mode | Parallel bus |
| Supported Modules | S5-100U and S5-135U I/O modules |
| Power Supply | 5V DC via expansion bus (from central rack) |
| Current Consumption | 5V DC / 200mA (max) |
| Weight | 0.6 kg |
| Dimensions (W x H x D) | 50 x 120 x 116.4 mm |
| Operating Temperature | 0°C to 60°C |
| Protection Rating | IP20 |
Reliable Interface for Expansion Racks
The Siemens 6ES5581-1EA11 interfaces with the S5-135U central rack via the expansion bus connector. This connection ensures seamless power and data transfer to all slots in the expansion rack. The module’s reliable communication supports up to 12 I/O modules for enhanced system capacity.
Integrated Power Distribution
The basic module supplies 5V and 24V DC to all modules installed in the expansion rack. This distribution eliminates the need for a separate power supply unit in the expansion rack. The module consumes only 200mA from the 5V bus, minimizing central rack power requirements.
Modular System Expansion
Engineers can add this basic module to any S5-135U system for flexible I/O capacity growth. The module supports both S5-100U and S5-135U I/O modules within the same rack. This compatibility simplifies upgrades and spare part management.
Installation and Application
The basic module occupies two slots in the expansion rack, preserving space for I/O modules. It suits applications requiring distributed I/O for large-scale automation systems. The 0°C to 60°C temperature range covers standard industrial environments.