Siemens 6ES5135-3KA12 PLC Rack | 12-Slot S5-135U Chassis

The Siemens 6ES5135-3KA12 PLC rack provides mechanical support for SIMATIC S5-135U modules. This rack houses CPUs, I/O cards, and communication processors in one enclosure. It connects to power supplies and backplane buses for system integration. You can use this rack as a direct replacement for damaged or expanded chassis.

Detailed Technical Specifications

The Siemens 6ES5135-3KA12 PLC rack measures 482 mm in width. Its height reaches 267 mm (6U format) for standard mounting. The total depth goes up to 245 mm including rear connectors. This unit weighs approximately 4.8 kilograms for secure installation.

Key hardware parameters include:

Complete Model: Siemens 6ES5135-3KA12
Module slots: 12 slots for S5-135U modules
Slot spacing: 25.4 mm (1 inch) per slot
Backplane type: Multi-layer passive PCB
Bus architecture: Parallel I/O and communication buses
Connectors: 48-pin DIN for each module slot
Mounting: Rack-mount (19-inch standard)
Weight capacity: 15 kg maximum for installed modules
Cooling: Natural convection (no fan required)
Material: Powder-coated steel chassis
Earth connection: M4 grounding stud on rear panel

The Siemens 6ES5135-3KA12 PLC rack stores no electrical charge whatsoever. Therefore, technicians can handle the rack without any safety precautions. The backplane supports both 8-bit and 16-bit data transfers. Moreover, the rack includes a dedicated slot for the processor module.

Technical Parameter	Specification
Full Model Number	Siemens 6ES5135-3KA12
Width	482 mm (19-inch)
Height	267 mm (6U)
Depth	245 mm
Module Slots	12 slots
Slot Spacing	25.4 mm
Backplane Type	Passive multi-layer PCB
Module Connector	48-pin DIN
Mounting Style	Rack-mount
Max Module Weight	15 kg total
Cooling Method	Natural convection
Chassis Material	Powder-coated steel
Weight (empty)	4.8 kg

Application and Installation

The Siemens 6ES5135-3KA12 PLC rack mounts into a standard 19-inch industrial cabinet. It requires four M6 screws for secure front-panel mounting. This rack accepts any combination of S5-135U modules in its 12 slots. Consequently, you can build systems from small to large I/O counts using one chassis.

Backplane and Configuration

This rack separates I/O and communication buses for better performance. The Siemens 6ES5135-3KA12 includes an integrated backplane with no moving parts. You can install the CPU in any slot, though slot 1 is standard. Therefore, system configuration remains flexible for different application requirements.

Always mount the rack in a vertical orientation for proper cooling. Connect the ground stud to the cabinet earth bus securely. The rack features a removable rear plate for cable access. Furthermore, its steel construction provides excellent electromagnetic shielding.