Siemens 6ES5788-7LB11 SIMATIC S5 Input Simulation Module

The 6ES5788-7LB11 replaces physical field signals during PLC testing. This simulation module mounts directly into an S5-100U or S5-95U rack. It allows engineers to verify logic without connecting real sensors or switches.

You can activate or deactivate each simulated input manually. The 6ES5788-7LB11 provides sixteen independent channels for this purpose. Each channel represents a discrete 24V DC input signal to the CPU. This approach saves valuable commissioning time on the factory floor.

Technical Specifications and Physical Dimensions

This module consumes very little energy during normal operation. It draws its power entirely from the backplane bus. The 6ES5788-7LB11 does not include any onboard battery or capacitor. Consequently, it stores no energy and requires no periodic replacement.

Interface Layout and Front Panel Controls

A single 48-pin front connector links the module to the PLC. The 6ES5788-7LB11 features sixteen rocker switches arranged in two rows. Each switch clearly indicates the ON or OFF state with a mechanical position. An LED also illuminates when the channel provides a logic “1” signal.

Transitioning between states happens instantly after you flip a switch. This immediate response eliminates scanning delays during simulation. The 6ES5788-7LB11 also offers a terminal block for optional external wiring.

Operational Benefits for Engineers

This module removes the need for external push-button panels. You can simulate entire machine sequences from a single S5 rack slot. The 6ES5788-7LB11 works perfectly with ladder logic testing. It also supports function block validation before field installation.