Siemens 6ES7401-2TA01-0AA0 SIMATIC S7-400 CR2 18-Slot PLC Rack

The Siemens 6ES7401-2TA01-0AA0 SIMATIC S7-400 CR2 rack is an 18-slot central rack split into two segments of 8 or 10 slots, with the communication bus running through both segments, a separated P bus, and room for two redundant power supplies. It measures 482.5 mm wide by 290 mm high by 27.5 mm deep and weighs 4.1 kg. Rated ambient operating temperature is 0 to 60 degrees C.

Technical Specifications

Certifications & Standards

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

Selection Notes

The CR2 keeps a single communication bus across both 8/10-slot segments while isolating only the P bus, and it has room for two redundant power supplies, a fit for a central rack that needs power redundancy and more than a handful of slots but not full dual-bus segment isolation. Choose a rack with a separated communication bus per segment instead when the design needs true bus-level redundancy, or a smaller central rack when fewer than 18 slots are needed.

Applications

The two redundant power supply slots make the CR2 a fit for a central S7-400 rack that must stay powered through a single power-supply failure, without the segment-level bus isolation an H-system needs. It suits process or plant controllers with 18 or fewer module slots where uninterrupted power, not full CPU redundancy, is the priority.