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Reliable 24V DC Output for SIMATIC S5-100U Systems
The Siemens 6ES5451-3AA11 digital output module provides sixteen isolated output channels for driving actuators in S5-100U and S5-95U controllers. This module switches solenoids, contactors, lamps, and other 24V DC loads with 0.5A per channel. It features LED status indicators for each output to simplify diagnostics.
Technical Specifications
| Parameter | Specification |
|---|---|
| Manufacturer | Siemens |
| Model | 6ES5451-3AA11 |
| Series | SIMATIC S5 |
| Product Type | Digital Output Module |
| Number of Outputs | 16 (isolated) |
| Output Voltage | 24V DC |
| Output Current per Channel | 0.5A (continuous) |
| Total Output Current per Module | 4A max (at 40°C), 2A max (at 60°C) |
| Output Type | Transistor (sourcing) |
| Protection Features | Short-circuit and thermal overload protection |
| Switching Frequency (resistive) | 100 Hz |
| Output Delay (0→1) | 0.5 ms |
| Output Delay (1→0) | 1.0 ms |
| Galvanic Isolation | 1500V AC (between outputs and backplane bus) |
| Status Indicators | 1 x green LED per output channel |
| Power Supply | 24V DC (external), 5V DC via backplane bus |
| Current Consumption (5V) | 5V DC / 150mA (max) |
| Weight | 0.4 kg |
| Dimensions (W x H x D) | 25 x 120 x 116.4 mm |
| Operating Temperature | 0°C to 60°C |
| Protection Rating | IP20 |
High-Density Output Architecture
The Siemens 6ES5451-3AA11 packs sixteen outputs into a single 25mm slot for space-saving installations. This density suits applications requiring many actuator outputs in a compact footprint. The module’s 0.5A per channel drives most standard industrial loads directly.
Robust Protection Features
Each output includes short-circuit protection to prevent damage from wiring faults. The thermal overload shutdown also activates during excessive current draw or high ambient temperatures. These protective measures ensure long-term reliability in demanding environments.
Fast Switching Performance
The module achieves 0.5 ms turn-on and 1.0 ms turn-off delays for responsive control. This speed supports high-speed applications such as sorting, counting, and rapid cycling. The 100 Hz switching frequency also suits pulse applications.
Visual Status Diagnostics
Green LEDs illuminate for each active output, providing immediate channel status. This visual feedback significantly reduces troubleshooting time. The clear indication helps operators verify system operation quickly.