Siemens 6ES5456-4UA11 Digital Output Module

Core High-Voltage Output Capability for S5 Systems

The Siemens 6ES5456-4UA11 is a digital output module for the SIMATIC S5-135/155U programmable logic controller family . This module provides reliable high-voltage AC outputs for controlling field devices such as contactors, relays, solenoid valves, and indicator lamps. It features 16 output channels that support 115V/240V AC at 2A per channel, making it suitable for demanding switching applications in legacy automation systems .

Compact Design and Industrial Durability

This module comes in a floating compact version with robust construction for harsh industrial environments. Its design simplifies installation and ensures stable operation across a wide temperature range . The following table details its key functional and physical parameters.

Parameter	Specification
Manufacturer / Series	Siemens / SIMATIC S5-135/155U
Product Model	6ES5456-4UA11
Module Type	Digital Output Module
Number of Channels	16
Output Voltage	115V / 240V AC
Max Output Current	2 A per channel
Operating Temperature	-25°C to +60°C
Weight	approx. 0.5 kg
Product Status	Discontinued (EOSR: 1999-04-01)

Application in Legacy S5 System Support

Plant engineers use this module to maintain high-voltage output capabilities on existing S5-135U and S5-155U systems. It is especially valuable in older manufacturing and process control installations where AC switching equipment remains in use. The Siemens 6ES5456-4UA11 enables continued operation of proven legacy equipment without costly system overhauls. Therefore, sourcing tested and functional units from specialized suppliers is essential for lifecycle management of classic Siemens automation platforms.