SIEMENS 6ES7400-1JA01-0AA0 Rack UR2 Central and distributed with 9 slots

Buy online your SIEMENS 6ES7400-1JA01-0AA0 Rack UR2 Central and distributed with 9 slots from our e-store Cnc-shopping, specialist in CNC machine-tools spare parts.

The SIEMENS SIMATIC S7-400 UR2 (6ES7400-1JA01-0AA0) is a 9-slot subrack designed to accommodate CPU, power supply, and I/O modules within the SIMATIC S7-400 automation platform. It serves as the mechanical and electrical backbone of a PLC station, providing the integrated backplane bus required for communication between modules and ensuring reliable system operation in industrial control environments.

Suitable for both central and distributed configurations, the UR2 rack can host CPU 41x processors, PS 405 or PS 407 power supply modules, and a wide range of signal, communication, and function modules. It can also be used with interface modules to expand the system to additional racks in accordance with SIMATIC S7-400 architecture. Its nine available slots provide flexibility for integrating CPUs, communication interfaces, and I/O modules while supporting complex automation requirements.

The integrated backplane ensures dependable communication between installed modules and maintains consistent addressing throughout the system. Robust module guides and locking mechanisms simplify maintenance procedures and allow fast replacement of cards while protecting connectors from damage. The rack is commonly installed in control cabinets for CNC machine tools, production lines, material handling systems, heavy machinery, and retrofit projects where SIMATIC controllers interact with SINUMERIK systems, drives, PROFIBUS networks, or Industrial Ethernet infrastructure.

The 6ES7400-1JA01-0AA0 is frequently used as a replacement component when an existing chassis has suffered mechanical damage, connector wear, corrosion, or intermittent backplane faults. Replacing the complete subrack can restore system reliability without requiring changes to the existing automation architecture. The 9-slot layout is particularly valuable in applications that require higher I/O capacity and multiple communication modules.

Each unit can be tested on dedicated PLC test benches to verify backplane integrity, slot addressing, and compatibility with SIMATIC S7-400 modules. Protective ESD-safe packaging is used to ensure safe transportation, and warranty coverage is generally provided according to supplier terms.

As a spare part for maintenance, retrofit, and repair projects, the SIMATIC S7-400 UR2 subrack remains an important component for supporting existing S7-400 installations. It helps reduce downtime, extend the service life of industrial automation systems, and maintain reliable operation of critical production equipment.

Frequently asked questions about 6ES7400-1JA01-0AA0:

What modules typically fit this UR2 rack
The UR2 9-slot chassis accommodates S7-400 modules such as CPU 41x, PS 405 or PS 407 power supplies, communications processors and signal or function modules. Slot usage and placement should follow SIEMENS documentation for the selected CPU and I/O set.

Can it be used as a distributed expansion rack
Yes. It supports distributed operation through the appropriate SIEMENS interface modules that link a central rack to one or more expansion racks. Select the correct IM pair according to the required topology.

Does the rack include the backplane bus
The subrack integrates the backplane that interconnects all installed modules. This provides power distribution from the PS module and system bus communication between CPU and I/O cards.

Is it a direct drop-in replacement for an existing S7-400 UR2
For systems built around a UR2 9-slot layout, this unit is a drop-in mechanical and electrical replacement. Verify slot assignments, CPU type and interface modules to match the original configuration before commissioning.