Siemens 6ES5700-2LA11 Central Mounting Rack SIMATIC S5

Product Overview

The 6ES5700-2LA11 central mounting rack serves as the backbone for SIMATIC S5-115U automation systems. This robust chassis provides the mechanical foundation and electrical interconnection for all critical control modules. We design this rack for engineers who need reliable performance in demanding industrial environments.

Technical Specifications

Parameter	Specification
Model Number	6ES5700-2LA11 (6ES5 700-2LA11)
Product Series	SIMATIC S5
Compatible Controller	S5-115U Central Controller
Total Slots	7 slots
Fixed Slots	Slot 0 for Power Supply Module, Slot 1 for CPU
Free Slots	5 slots for I/O, communication, and interface modules
Backplane Bus	Integrated K-Bus and P-Bus for logic and power distribution
Dimensions (W x H x D)	450mm x 300mm x 150mm (Approx.)
Weight	Approx. 10 kg
Material	High-grade steel with corrosion-resistant plating
Protection Class	IP20 for indoor cabinet installation
Mounting Style	19-inch rack or direct panel mounting
Operating Temperature	0°C to +60°C

Advanced Slot Architecture

The 6ES5700-2LA11 follows a fixed-slot architecture that simplifies system configuration. Slot 0 exclusively accommodates the power supply module, while Slot 1 hosts the central processing unit. This arrangement ensures consistent power delivery and signal integrity across the backplane.

Backplane Bus System

This central mounting rack integrates both the K-Bus (communication bus) and the P-Bus (power distribution bus) directly into its printed circuit board. Gold-plated spring contacts on the backplane ensure reliable electrical connections with each plugged module. This dual-bus design supports efficient data exchange and stable power distribution throughout the system .

Installation and Mechanical Design

The robust U-shaped frame construction provides excellent mechanical stability for the installed modules. Users can mount the 6ES5700-2LA11 in standard 19-inch cabinets or directly onto control room panels. The front locking mechanisms secure each module firmly in place, preventing disconnection from vibration or shock.

Compatible Modules

The five free slots accept a wide range of SIMATIC S5-115U modules. Users can install digital and analog I/O modules, intelligent I/O processors (IPs), communication processors (CPs), and interface modules for expansion unit connections . This flexibility allows the system to adapt to various application requirements.

Application Environments

This mounting rack operates reliably in indoor industrial environments with controlled temperatures. The IP20 protection rating makes it suitable for installation in electrical cabinets and control rooms, where it provides a stable platform for critical automation tasks.