Siemens SIPART PS2 Smart Electropneumatic Positioner

Technical Overview

Smart electropneumatic positioner for linear/part-turn actuators. Features 4-20mA input, IP66/NEMA 4X polycarbonate housing, -30 to +80 °C range.

Key Features

Electropneumatic positioner for pneumatic linear and part-turn actuators.
Operates with a 4-20 mA input signal.
Features wear-free, non-contacting position detection (NCS).
Enclosure made of robust, glass-fibre reinforced polycarbonate (Makrolon).
Provides IP66 and NEMA 4X ingress protection.
Designed for a wide ambient temperature range from -30 to +80 °C.
Supports compressed air, purified natural gas, or nitrogen as the operating medium.
Single-acting design for pneumatic actuators.
Can be configured and operated on-site via local buttons and an LCD display (if configured) or remotely via SIMATIC PDM software.
Offers automatic initialization for quick and easy setup.
Characterized by low air consumption, reducing operating costs.
Equipped with various diagnostic features for monitoring locator and valve status.

Technical Specification Matrix

Parameter	Value
Product Type	Electropneumatic Positioner
Series	SIPART PS2
Input Signal Range	4 to 20 mA
Enclosure Material	Polycarbonate, glass-fibre reinforced (Makrolon)
Design	Single-acting
Position Detection	Non-contacting (NCS)
Mounting Configuration	For pneumatic linear actuators (IEC 534-6/NAMUR) or part-turn actuators (VDI/VDE 3845, DIN 3337)
Rotation Angle for Part-Turn Actuator	30 to 100 degrees
Stroke Range for Linear Actuator	3 mm to 130 mm
Electrical Connection Type	2-wire
Cable Entry (Electrical)	M20 x 1.5
Pneumatic Actuating Pressure Connection	G 1/4 inch
Power Supply Type	Pneumatic
Operating Medium	Compressed air, purified natural gas, or nitrogen
Max Supply Pressure	7 bar
Air Consumption	0.01 m³/h
Compressed Air Quality (Humidity and Liquid Water)	Class 2
Ambient Temperature Range	-30 to +80 °C
Ingress Protection Rating	IP66
NEMA Rating	NEMA 4X
EMC Compliance	As per EC Declaration of Conformity
PED Compliance	Article 3.3, gas group 1
Physical Weight (kg)	0.9
Dimensions L x W x H (cm)	0 x 0 x 0

Industrial Applications

1. Precise Chemical Batch Reactor Valve Control

In chemical processing plants, precise control over the flow of reagents into a batch reactor is critical for product quality and safety. This positioner can accurately modulate the opening of pneumatic control valves (linear or part-turn) based on a 4-20mA signal from a Distributed Control System (DCS). Its IP66/NEMA 4X rating ensures protection against corrosive fumes and washdown procedures common in chemical environments.

Problem Solved

Ensures accurate and repeatable control of critical process valves in harsh chemical environments, preventing off-spec batches and potential safety incidents due to inaccurate flow.

Chemical processingbatch reactorpneumatic control valve4-20mAIP66NEMA 4Xcorrosive environmentprocess control

2. Remote Oil & Gas Pipeline Flow Regulation

For remote pipeline sections in the oil and gas industry, this electropneumatic positioner can regulate the flow through large part-turn or linear valves. Its wide operating temperature range (-30 to +80 °C) allows it to function reliably in diverse climates, from cold winters to hot summers, ensuring consistent flow rates and pressure regulation, even when using natural gas as the operating medium for the actuator.

Problem Solved

Provides robust and precise control of critical pipeline valves in remote and environmentally challenging oil & gas applications, maintaining optimal flow and preventing disruptions.

Oil and gaspipelineflow regulationpneumatic actuator-30 to +80 °Cnatural gaspart-turn valveremote operation

3. Automated Aeration Control in Wastewater Treatment

In wastewater treatment, controlling aeration basin dissolved oxygen levels often involves modulating air flow through pneumatic valves. This positioner can precisely adjust the valve position based on 4-20mA signals from DO sensors. Its IP66/NEMA 4X protection safeguards against the humid, often corrosive conditions and occasional water splashes found in aeration basins, ensuring reliable operation and efficient energy use for blowers.

Problem Solved

Enables accurate and reliable control of aeration valves in challenging wastewater environments, optimizing dissolved oxygen levels for biological processes and reducing energy consumption.

Wastewater treatmentaeration basindissolved oxygenpneumatic valve4-20mAIP66NEMA 4Xhumid environmentenergy efficiency