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Technical Overview
The Siemens 6ES5456-4UA12 is a digital output module for the SIMATIC S5-135U programmable controller series. This unit converts logic signals from the CPU into 24 VDC output signals for driving actuators, relays, and solenoids. It features 16 transistor output channels, each capable of delivering 0.5 A continuously. Each channel includes built-in short-circuit protection, safeguarding the module and external devices from damage. The module uses optical isolation to prevent electrical noise from reaching the controller.
Technical Specifications
| Parameter | Specification |
|---|---|
| Manufacturer | Siemens |
| Model Number | 6ES5456-4UA12 |
| Product Type | Digital Output Module |
| System Compatibility | SIMATIC S5-135U |
| Number of Outputs | 16 (transistor) |
| Output Voltage | 24 VDC |
| Output Current | 0.5 A per channel (resistive load) |
| Short-Circuit Protection | Yes (built-in) |
| Inductive Load Protection | Free-wheeling diodes |
| Turn-On Time | 0.2 ms |
| Turn-Off Time | 0.5 ms |
| Isolation | Optical (channels to backplane) |
| Power Consumption | 4 W (typical from backplane) |
| Terminal Type | 48-pin front connector |
| Dimensions | 233 x 37 x 268 mm |
| Weight | 0.38 kg |
| Operating Temperature | 0°C to +60°C |
| Storage Temperature | -40°C to +85°C |
| Humidity | 5% to 95% RH (non-condensing) |
| Certifications | CE, UL, CSA |
| Country of Origin | Germany |
Key Features
High-Density Output Design – The 16-channel configuration provides numerous outputs in a single slot, saving panel space and reducing system complexity.
Built-in Short-Circuit Protection – This feature protects both the module and external actuators from overload and fault conditions.
Fast Switching Performance – The 0.2 ms turn-on time supports high-speed control applications.
Optical Isolation – The module isolates field wiring from the backplane, protecting the CPU from electrical noise.
Integrated Free-Wheeling Diodes – These diodes suppress voltage spikes when switching inductive loads.
LED Status Indicators – Individual channel LEDs provide immediate visual feedback for each output.
Applications
The Siemens 6ES5456-4UA12 is ideal for controlling actuators, solenoid valves, contactors, and indicator lamps. It performs reliably in manufacturing automation, machine control, and material handling systems.