Chassis System Overview
The Siemens 6ES7400-1TA01-0AA0 provides the physical mounting platform for the SIMATIC S7-400 programmable logic controller series. This 18-slot rack accommodates all power supplies, CPUs, and I/O modules in a single chassis. It incorporates both a data bus and a power bus for complete system integration. Large-scale automation projects depend on this rack for organized module arrangement.
Technical Specifications
The 6ES7400-1TA01-0AA0 measures 482.6 mm in width and 287.5 mm in height. Its standard 19-inch rack width fits industry-standard control cabinets. The chassis weighs approximately 2.8 kilograms when empty. It requires a 24V DC supply for the backplane bus.
| Parameter | Specification |
|---|---|
| Model | 6ES7400-1TA01-0AA0 |
| Product Type | UR1 Rack (Universal Rack) |
| Dimensions | 482.6 mm x 287.5 mm x 155 mm (depth) |
| Weight | ~2.8 kg (empty) |
| Supply Voltage | 24V DC (via backplane) |
| Backplane Current | Up to 5 A total |
| Number of Slots | 18 (single-width) |
| Bus Types | 1 x P-bus, 1 x K-bus |
| Compatible Modules | S7-400 power supplies, CPUs, I/O, function modules |
| Connector Type | 1 x 9-pin D-sub (for external battery) |
| On-board Components | 1 x backplane PCB, 2 x bus terminating resistors |
| Energy Storage | Supports external battery backup (6ES7971-0BA00) |
| LED Indicators | None (no active components) |
| Operating Temp. | 0°C to +60°C |
Backplane Bus Architecture
This rack features two independent bus systems for data and power distribution. The P-bus handles all peripheral I/O communications within the chassis. The K-bus provides a dedicated communication path for the CPU and function modules. Each slot offers a standard S7-400 interface connector for module insertion. Two terminating resistors at the bus ends ensure signal integrity. The backplane can supply up to 5 A total current across all modules.
Module Compatibility and Slot Organization
The Siemens 6ES7400-1TA01-0AA0 accepts any standard S7-400 module in each slot. The power supply module occupies the first slot on the left side. The CPU module typically goes in the second slot for optimal configuration. You can place I/O modules and communication processors in any remaining slots. The rack’s 18-slot capacity supports extensive system expansion. This architecture allows flexible module arrangement for specific application needs.
Installation and Mounting Requirements
Installing the 6ES7400-1TA01-0AA0 requires standard 19-inch rack mounting rails. The chassis slides into the cabinet and secures with four mounting screws. You must connect the 24V DC supply to the power feed connector. Grounding the rack properly prevents electromagnetic interference issues. The module operates reliably between 0°C and 60°C ambient temperatures. Proper ventilation around the rack ensures adequate cooling. The external battery connector supports optional backup for the system clock.
Reliability and System Integration
The Siemens 6ES7400-1TA01-0AA0 provides a robust foundation for critical automation systems. Its passive backplane design eliminates active failure points. The rack’s metallic construction offers effective electromagnetic shielding. Regular inspection includes verifying module seating and bus termination. System expansion requires only inserting additional modules into free slots.
Details
| Weight | 2.8 kg |
|---|---|
| Dimensions | 482.6 × 287.5 × 155 mm |
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