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Technical Overview
The Siemens 6ES5246-4UA21 is a positioning module (IP 246) from the SIMATIC S5 series, engineered for closed-loop position control of two independent DC drives. This compact module fits into a double-height Euro format slot and serves as a critical component in precision motion control applications. It connects incremental position encoders to the SIMATIC S5-135U, S5-155U, and S5-155H programmable controllers.
The 6ES5246-4UA21 features two channels for connecting incremental position encoders, making it suitable for applications involving auxiliary axes in metalworking machinery, paper and textile machines, handling equipment, and transfer lines. This positioning module relies on self-ventilation for cooling, distinguishing it from the forced-ventilated version (6ES5246-4UA31) intended for higher temperature environments.
Technical Specifications
| Parameter | Specification |
|---|---|
| Manufacturer | Siemens |
| Model Number | 6ES5246-4UA21 |
| Product Type | IP 246 Positioning Module |
| System Compatibility | SIMATIC S5-135U, S5-155U, S5-155H |
| Number of Axes | 2 (independent) |
| Encoder Interface | Incremental position encoders |
| Encoder Input Types | 5V differential signals (RS 422) or 24V signals |
| Counting Frequency (5V) | 500 kHz max |
| Counting Frequency (24V) | 50 kHz max |
| Analog Output Range | ±10V DC |
| Analog Output Load | 5 kΩ minimum |
| Digital Inputs | 4 per axis (24V DC) |
| Digital Outputs | 2 per axis (24V DC, 120 mA) |
| Power Supply | 24V DC (20-30V range) |
| Processor | 80186 |
| RAM | 16 KB battery-backed |
| Weight | 0.4–1.0 kg |
| Cooling | Self-ventilated |
| Country of Origin | Germany |
Key Features
Dual-Axis Closed-Loop Control – The Siemens 6ES5246-4UA21 drives two independent axes simultaneously, providing precise closed-loop position control with incremental encoder feedback.
Versatile Encoder Compatibility – This module accepts both 5V differential (RS 422) and 24V incremental encoders, offering flexibility for various feedback devices. Users can select the input type via plug-in jumpers .
16-Bit Microprocessor Architecture – The IP 246 includes an 80186 processor, 16 KB battery-backed RAM, and a dual-port RAM interface for efficient communication with the S5 CPU .
Comprehensive I/O Interfaces – The module features dedicated connectors for incremental encoders, analog setpoint outputs, digital inputs, digital outputs, and a TTY programming interface .
Battery-Backed Memory – The module stores machine data and travel programs in battery-backed RAM, preserving critical configuration during power outages .
Applications
The Siemens 6ES5246-4UA21 suits metalworking machinery, paper and textile machines, handling equipment, transfer lines, assembly lines, and machine tool positioning applications within SIMATIC S5-based automation systems.