Siemens 6ES7400-1JA01-0AA0 SIMATIC S7-400 UR2 9-Slot Central/Distributed Rack

The Siemens 6ES7400-1JA01-0AA0 is a SIMATIC S7-400 UR2 rack with 9 slots for central or distributed configuration, accepting 2 redundant power supplies in the leftmost slots. It carries both the communication bus and P bus across all slots, letting S7-400 CPUs, signal modules, and communication processors share the same backplane.

Technical Specifications

Certifications & Standards

• CE
• UKCA
• UL
• FM
• RCM
• KC
• EAC
• CCC

Selection Notes

Nine slots accepting 2 redundant power supplies make the UR2 fit S7-400 stations that need power-supply redundancy but not a full-size backplane — the redundant PS pair occupies 2 of the 9 positions, leaving 7 for CPU, signal, and communication modules. Because it exposes both the communication bus and the P bus across every slot, the same rack works for a station built entirely from local modules or one that also carries distributed-I/O interface modules. Choose a larger S7-400 rack instead when the module count for a given station will not fit within 7 usable slots after the redundant supplies.

Applications

Central or distributed S7-400 stations where power-supply redundancy is required but slot count is limited — control cabinets with a compact module set, or expansion racks in a multi-rack S7-400 system that need PS redundancy without a full-size backplane.