Rack Identification and Key Specs
The Siemens 6AG1400-1TA11-4AA0 is a SIPLUS variant of the S7-400 UR1 rack, featuring conformal coating for medial exposure. It offers 18 single-width slots and supports both P bus and communication bus, making it suitable as a central or distributed rack in an S7-400 system. The rack is 482.5 mm wide, 290 mm tall, and 27.5 mm deep. Its lifecycle status is current, so this is an actively produced spare part, not a phase-out item.
Mounting and Bus Connectivity
The rack accepts two redundant power supplies and up to 18 single-width modules. The integrated P bus and communication bus eliminate the need for separate backplane cabling.
Sourcing Status
The conformal coating is factory-applied. When sourcing, request traceability to the original SIPLUS production lot to confirm the coating is genuine and not a post-market addition.
Verification Points for Incoming Inspection
Inspect the rack labeling for the SIPLUS designation and a production date code consistent with the base model (6ES7400-1TA11-0AA0). The conformal coating should be uniform and cover all exposed surfaces—any irregularities suggest field modification rather than factory application.