Product Overview

The Siemens 6DR5020-0NG00-0AA0 (6DR50200NG000AA0) is a high-performance SIPART PS2 electropneumatic positioner, widely recognized as the industry standard for controlling both linear and part-turn (rotary) actuators. This specific variant is a double-acting unit, designed to provide balanced pneumatic pressure to both sides of an actuator piston for precise, high-torque valve modulation. Utilizing a 4-20 mA input signal, the PS2 employs a unique "non-contacting" magnetic sensor technology or high-durability mechanical feedback to achieve a positioning accuracy of < 0.05%. Its integrated diagnostic features, such as the "Valve Performance Test" and "Partial Stroke Test" (PST), allow plant operators to implement predictive maintenance strategies, significantly reducing the risk of unplanned shutdowns in critical sectors like oil & gas, chemicals, and power generation.

Technical Configuration

The 6DR5020-0NG00-0AA0 is engineered for versatility and ease of use in non-hazardous industrial environments.

• Double-Acting Operation: Equipped with two pneumatic outputs (Y1 and Y2), allowing for the active control of double-acting actuators without the need for external spring-return mechanisms.

• Communication: Standard 4-20 mA analog control. While this model is the base version (non-HART), it retains the full suite of local diagnostic and configuration tools via the integrated LCD.

• Robust Enclosure: Housed in a Makrolon (glass-fiber reinforced polycarbonate) casing, providing IP66 protection against dust and high-pressure water ingress.

• Smart Initialization: Features "One-Touch" automatic initialization, where the positioner autonomously determines the travel range, stroke speed, and PID control parameters.

• Low Air Consumption: The patented piezo-precontrol valve ensures that compressed air is only consumed during movement, leading to significant energy savings and reduced compressor wear.

Technical Specifications

Technical FAQs

Does this unit support HART communication?

No. The "5020" series is the standard analog version. For HART capability, the "5120" or "5220" series modules are required. However, it can be upgraded via an internal HART communication module if needed.

What is the advantage of a double-acting positioner?

Double-acting positioners like the 6DR5020-0NG00-0AA0 provide more stable control for large valves because they actively push the actuator in both directions, eliminating the "dead-band" often associated with heavy spring-return systems.

Can I use this positioner in an explosive atmosphere?

No. This specific part number (0NG suffix) is for non-Ex areas. For hazardous locations, you must select the versions with ATEX/IECEx certifications (e.g., 6DR5010 for Intrinsically Safe or 6DR5015 for Flameproof).

Engineering & Installation Guide

• Pneumatic Connection (Y1/Y2): For double-acting actuators, Y1 typically connects to the "Open" chamber and Y2 to the "Close" chamber. Ensure the air supply is filtered to 5 microns and is free of oil and moisture. Contaminated air is the leading cause of "stiction" in the internal piezo-valves.

• Mounting Alignment: Ensure the feedback lever is perpendicular to the actuator stem at 50% travel. Incorrect geometry will lead to non-linear control and increased mechanical wear on the positioner’s internal shaft. Use the Siemens mounting kit (6DR4004-8V) for optimal alignment.

• Vibration Protection: In high-vibration applications, the use of the "SIA" module (Slot-type Initiator Alarm) or an external non-contacting sensor (NCS) is recommended to prevent mechanical feedback failure. For standard installations, ensure all mounting bolts are torqued and thread-locked.