Siemens 6ES7401-1DA01-0AA0 SIMATIC S7-400 CR3 4-Slot PLC Rack

The Siemens 6ES7401-1DA01-0AA0 SIMATIC S7-400 CR3 rack is a 4-slot central rack for compact, non-redundant S7-400 configurations, carrying both the communication bus and the P bus across its four slots. It measures 130 mm wide by 290 mm high by 27.5 mm deep and weighs 750 g. 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 CR3's four slots and single shared communication and P bus make it the smallest central rack in this range, suited to a stand-alone CPU with a handful of I/O or communication modules rather than a distributed or redundant setup. Choose a larger central rack when the application needs more module slots or bus segmentation for redundancy, or an extension rack when the goal is only to add signal modules to an existing central rack.

Applications

At 130 mm wide, the CR3 fits a compact S7-400 build inside a smaller control cabinet where only a CPU plus a few signal or communication modules are needed, such as a single-machine or skid-level controller. Its shared communication and P bus keeps wiring and configuration simple for a non-redundant standalone application.