The Siemens 6ES5185-3UA13 (EU185) is a high-capacity 21-slot expansion subrack designed for the Simatic S5-135U and S5-155U programmable logic controller systems. This robust chassis provides the necessary physical mounting and backplane communication infrastructure to extend I/O capabilities in large-scale industrial automation environments. Featuring an integrated 110/230 VAC power supply, the unit delivers stable, regulated power directly to the backplane, supporting high-density configurations of digital, analog, and communication modules without overloading the primary controller rack.
Features
21-slot capacity for extensive I/O and communication module integration.
Integrated multi-voltage power supply (110/230 VAC selectable).
Designed for seamless integration with Simatic S5-135U and S5-155U systems.
Heavy-duty aluminum alloy construction for structural integrity and EMI shielding.
Parallel bus architecture ensuring deterministic signal timing and high-speed data transfer.
Applications
This expansion subrack is engineered for critical industrial infrastructures requiring high-density I/O, including thermal power plants, oil and gas refining units, and heavy manufacturing control systems. It is ideal for system expansion or as a direct replacement for legacy S5 rack hardware to maintain operational continuity.
Technical Specifications
Model
6ES5185-3UA13
System Family
Simatic S5-135U / S5-155U
Slot Count
21
Input Voltage
110 VAC / 230 VAC
Operating Temperature
0 to 55 deg C
Storage Temperature
-40 to 70 deg C
Relative Humidity
95 percent (non-condensing)
Installation Guidelines
Ensure the subrack is mounted in a clean, dry, and vibration-free environment within an industrial cabinet.
Verify that the power supply input voltage selector is correctly set to match the local supply (110 VAC or 230 VAC) before applying power.
Always power down the system before inserting or removing modules to prevent electrical damage to the backplane connectors.
Ensure proper grounding of the chassis to the cabinet frame to maintain EMI protection and safety.
Maintain adequate clearance around the unit to allow for natural convection cooling.
FAQ
Is this subrack compatible with all S5 modules?
The 6ES5185-3UA13 is designed for standard Simatic S5-135U/155U modules. Please verify the physical form factor and electrical requirements of your specific I/O modules against the S5 system documentation.
Does this unit require an external power supply?
No, this unit features an integrated power supply that accepts 110/230 VAC line power and converts it to the required internal DC bus voltages.
