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Technical Overview
The Siemens 6ES5246-4UA21 is a positioning module (IP 246) from the SIMATIC S5 series designed for closed-loop position control of two independent DC drives . This compact module, also known as the IP 246, 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/H |
| 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) |
| Weight | 0.4–1.0 kg (varies by configuration) |
| Self-Ventilated | Yes |
Key Features
Dual-Axis Closed-Loop Control – This 6ES5246-4UA21 positioning module drives two independent axes simultaneously, providing precise closed-loop position control with incremental encoder feedback.
Versatile Encoder Compatibility – The 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.