Siemens 6ES5451-4UA14 SIMATIC S5 32-Channel Digital Output Module

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Product Overview

The Siemens 6ES5451-4UA14 is an isolated digital output module in the SIMATIC S5 451-4 series. It provides 32 outputs for switching 24 V DC field loads, with a rated current of 0.5 A per output. The outputs form one isolated group, while separate fuses protect each set of eight. This combination gives an S5 control system a high-density output interface for machinery with numerous discrete control points. 

Technical Specifications

Features

• 32 digital outputs for 24 V DC loads
• 0.5 A rated switching current per output
• Galvanic isolation between the output group and the system
• One fuse for every eight outputs
• Short-circuit indication for each eight-output group
• Compact SIMATIC S5 451-4 design

Model Benefits
• High output density: Controls up to 32 discrete points from one module.
• Group protection: Four output groups have separate fuses, with one fuse assigned to each eight-output set.
• Clear fault indication: A short-circuit indicator identifies the affected eight-output group.
• Defined load capacity: The documented 0.5 A channel rating and 4 A limit per eight outputs make load planning straightforward.  

Industries Served

Frequently Asked Questions

1) How many outputs does 6ES5451-4UA14 provide?
It provides 32 digital outputs rated for 24 V DC operation.
2) What is the current rating of an individual output?
Each output is rated up to 0.5 A. The manual also specifies a maximum total switching current of 4 A for each group of eight outputs.
3) How are the outputs protected?
The -4UA14 version specifies one 7 A fast-acting fuse per eight outputs and a short-circuit indication for each group.
4) Is this the same as 6ES5441-4UA14?
No. Both are 32-output, 24 V DC/0.5 A modules, but Siemens identifies 6ES5451-4UA14 as isolated and 6ES5441-4UA14 as non-isolated.