Siemens 6ES5485-7LA11 Digital I/O Module

Discrete control applications require integrated input and output capabilities. The Siemens 6ES5485-7LA11 digital I/O module delivers this combined functionality for SIMATIC S5 systems. This module provides both input sensing and output actuation in a single unit. It simplifies system architecture and reduces cabinet space requirements.

Technical Architecture and Specifications

This I/O module features a standard SIMATIC S5 form factor for rack mounting. Its dimensions measure 25.3 cm in width and 22.5 cm in height. The Siemens 6ES5485-7LA11 weighs approximately 1.1 kilograms for secure installation. It interfaces with the system backplane via a 48-pin card-edge connector. This connector provides power and communication to the module circuits.

The internal assembly contains a single integrated circuit board with both input and output channels. Engineers will note the non-floating design that shares a common reference point. This configuration simplifies wiring for applications using a common power supply. The module draws 5 V DC power from the backplane for its logic circuits. It also requires 24 V DC external power for input and output operation.

Input and Output Configuration

The Siemens 6ES5485-7LA11 provides 24 discrete inputs and 16 discrete outputs. Inputs accept 24 V DC signals from sensors, switches, and pushbuttons. Among these inputs, four channels function as interrupt signals for priority processing. Outputs deliver 24 V DC at 1.5 amperes per channel for actuator control. For field wiring, it utilizes screw terminal blocks that accept AWG 14 to 22 gauge conductors. Status indicators display the state for each input and output channel clearly. You can explore similar industrial I/O solutions for reference.

Specification	Detail
Model	6ES5485-7LA11
Manufacturer	Siemens
Product Line	SIMATIC S5
Dimensions (W x H)	25.3 cm x 22.5 cm
Weight	1.1 kg
Input Channels	24 (24 V DC)
Interrupt Inputs	4 Channels
Output Channels	16 (24 V DC)
Output Current	1.5 A per Channel
Design Type	Non-Floating
Backplane Power	5 V DC
External Power	24 V DC
Terminal Type	Screw Clamp (AWG 14-22)

System Integration and Reliability

The Siemens 6ES5485-7LA11 operates reliably across standard industrial environments. It functions within a temperature range of 0°C to 60°C. The four interrupt inputs enable rapid response to critical process events. These interrupts trigger immediate processing without waiting for standard scan cycles. Maintenance personnel can diagnose channel status through front-panel LED indicators. The module supports simple replacement for reduced system downtime.