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Core Functionality and Application
The Siemens 6ES5444-3AA11 digital output module connects actuators to the SIMATIC S5 PLC system. This module provides eight output channels for controlling solenoid valves, contactors, and indicator lamps. It drives 24 VDC loads with a high current capacity per channel. Additionally, the module includes short-circuit protection for reliable field operation.
Technical Specifications
The following table details the core technical parameters for the Siemens 6ES5444-3AA11:
| Parameter | Specification |
|---|---|
| Model Number | 6ES5444-3AA11 |
| Product Type | Digital Output Module |
| Number of Outputs | 8 channels |
| Output Voltage | 24 VDC |
| Output Current per Channel | 2 A (at 60°C), derate to 1 A at 60°C |
| Total Current per Module | 8 A maximum |
| Output Type | Transistor (sourcing) |
| Short-Circuit Protection | Yes (electronic, per channel) |
| Inductive Load Protection | Free-wheeling diodes integrated |
| Isolation | Galvanic isolation between outputs and backplane |
| Dimensions (W × H × D) | 8.0 × 20.0 × 15.0 cm (3.15 × 7.87 × 5.91 in) |
| Weight | 0.7 kg (1.54 lbs) |
| Power Draw (5V) | 250 mA |
| Power Draw (24V) | 150 mA (no load) |
| Operating Temperature | 0°C to 60°C |
| Storage Temperature | -40°C to 85°C |
| Compatibility | SIMATIC S5-115U, S5-135U, S5-155U |
Design and Protection Features
The Siemens 6ES5444-3AA11 features complete galvanic isolation between the output circuits and the PLC backplane . Electronic short-circuit protection prevents damage to the module and connected devices . Integrated free-wheeling diodes protect the outputs when switching inductive loads . LED indicators on the front panel clearly show the status of each channel . The module also includes thermal protection that shuts down outputs in case of overheating .
System Compatibility and Use Cases
The Siemens 6ES5444-3AA11 integrates seamlessly with S5-115U, S5-135U, and S5-155U PLC systems. It connects to actuators like solenoid valves, motor starters, and indicator lamps in industrial applications. System integrators in manufacturing, material handling, and packaging use this module for reliable digital control. The output current capacity suits both small and medium-sized loads effectively. For demanding applications, users should consider load derating at elevated ambient temperatures .