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High-Density 24V DC Output Solution for SIMATIC S5
The Siemens 6ES5445-3AA12 digital output module offers sixteen isolated output channels for precise machine and process control. This module belongs to the SIMATIC S5 series and fits directly into S5-100U and S5-95U rack systems. It features 24V DC transistor outputs with 0.5A per channel for driving actuators, relays, and indicator lamps. The module also provides short-circuit protection and thermal overload shutoff for enhanced system safety.
Technical Specifications
| Parameter | Specification |
|---|---|
| Manufacturer | Siemens |
| Model | 6ES5445-3AA12 |
| Series | SIMATIC S5 |
| Product Type | Digital Output Module |
| Number of Outputs | 16 (isolated) |
| Output Voltage | 24V DC |
| Output Current per Channel | 0.5A |
| Total Output Current per Module | 4A max (at 40°C), 2.5A max (at 60°C) |
| Output Protection | Short-circuit and thermal overload protection |
| Switching Frequency (resistive load) | 100 Hz |
| Inductive Load Switching | 0.5 Hz |
| Output Delay (0 to 1) | 0.3 ms |
| Output Delay (1 to 0) | 1.0 ms |
| Backplane Bus Power Consumption | 5V DC / 200mA (max) |
| External Power Supply | 24V DC via connector |
| Galvanic Isolation | Yes |
| Weight | 0.3 kg |
| Dimensions (W x H x D) | 25 x 120 x 116.4 mm |
| Operating Temperature | 0°C to 60°C |
| Protection Rating | IP20 |
Application Versatility
This module drives a wide range of field devices, including solenoid valves, contactors, and visual indicators. Its fast switching response enables high-speed production line operations and sequential control tasks. Additionally, the module supports direct connection to 24V DC power sources without complex intermediate circuits.
Robust Protection Features
The Siemens 6ES5445-3AA12 incorporates built-in short-circuit protection on every output channel. This protection prevents damage from wiring faults or accidental overloads. The thermal shutdown mechanism also triggers automatically if internal temperatures exceed safe thresholds. These protective measures ensure long-term module reliability and system stability.
Compatibility and Integration
This module integrates seamlessly with S5-100U and S5-95U programmable controllers using the standard backplane bus. It occupies a single slot width, leaving valuable rack space for additional modules. The plug-in connector simplifies field wiring and maintenance procedures.
Thermal and Mechanical Design
The module operates effectively between 0°C and 60°C, covering most industrial environments. Its lightweight 0.3 kg design simplifies installation in DIN-rail mounted control cabinets. The compact 25mm width also allows high-density output configurations in space-constrained panels.