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Core Functionality and Application
The Siemens 6ES5420-4UA13 digital input module interfaces field switches and sensors with the SIMATIC S5 PLC system. This 32-channel module provides high-density signal acquisition for large-scale automation applications. It monitors contact closures, proximity sensors, and pushbutton states reliably. Moreover, the module includes electrical isolation for noise-immune operation in industrial environments.
Technical Specifications
The following table details the core technical parameters for the Siemens 6ES5420-4UA13:
| Parameter | Specification |
|---|---|
| Model Number | 6ES5420-4UA13 |
| Product Type | Digital Input Module |
| Number of Inputs | 32 channels (grouped in 4 x 8) |
| Input Voltage | 24 VDC (rated) |
| Input Voltage Range | 20.4 V to 28.8 V |
| Input Current | 8 mA per channel (typical) |
| Switching Threshold (ON) | ≥ 15 V |
| Switching Threshold (OFF) | ≤ 5 V |
| Input Delay | 3 ms (typical) |
| Isolation | Galvanic isolation via optocouplers |
| Dimensions (W × H × D) | 8.0 × 20.0 × 15.0 cm (3.15 × 7.87 × 5.91 in) |
| Weight | 0.75 kg (1.65 lbs) |
| Power Draw (5V) | 250 mA typical |
| Operating Temperature | 0°C to 55°C |
| Storage Temperature | -40°C to 85°C |
| Compatibility | SIMATIC S5-115U, S5-135U, S5-155U |
Design and Integration Features
The Siemens 6ES5420-4UA13 features a 32-channel design that maximizes I/O density in a single module. LED indicators on the front panel show the status of each input channel clearly. Four separate channel groups with common return lines simplify wiring to field devices. The module’s optical isolation protects the PLC backplane from electrical noise and surges. Users can connect the module to all standard 24 VDC sensors without additional interface circuitry.
System Compatibility and Use Cases
The Siemens 6ES5420-4UA13 integrates seamlessly with S5-115U, S5-135U, and S5-155U PLC systems. System integrators use this module in large-scale manufacturing lines, packaging machinery, and material handling systems. The 32-channel configuration suits applications requiring many input points in a limited rack space. Users should verify that their CPU can handle the additional I/O addressing.