SAR20 Azimuth Positioners and Polarization Positioners

Product catalog summary

Overview: The SAR20 Series Single Axis Positioners are designed for high precision and reliability in positioning antennas and electro-optical sensors. They offer high torque with low weight and are suitable for outdoor applications.

Applications: These positioners are used for antenna/electro-optical sensor positioning, anechoic chamber applications, far-field & near-field antenna measurements, and general-purpose angular positioning.

Key Features: The positioners are powered by step motors, offer high angular positioning accuracy, comply with MIL-STD-810F requirements, and feature a lightweight, rugged design with a durable marine-grade finish. They operate over a wide temperature range and include positional control software with RS485 communication and closed-loop control.

Technical Specifications: The SAR20 series includes models SAR20-N050, SAR20-N100, and SAR20-S050, with delivered torque ranging from 72 Nm to 145 Nm and maximum speeds from 8°/sec to 27°/sec. They offer accuracy and repeatability of less than ±0.02° and a resolution of 0.005°. The units are constructed from machined aluminum with stainless steel fasteners and feature a chromate coating and double layer of paint.

Electrical and Environmental Specifications: Operating voltage ranges from 24 VDC to 48 VDC, with motor power consumption varying based on movement and holding state. The units are equipped with heaters for temperature control and comply with various MIL-STD-810F environmental standards, including temperature, humidity, vibration, shock, rain, and icing.

Control and Communication: The positioners include standard software compatible with MS Windows, microstepping motor drive, adjustable azimuth and polarization limits, and multiple recordable preset positions. Communication is facilitated via RS485 and USB connections.

Miscellaneous: Optional modifications are available for the turntable and base flange. The system includes external cables and side brackets, with optional turntable brackets and counterweights. The main PC unit is not included.

Catalog excerpts

SAR20 Azimuth Positioners and Polarization Positioners-1

Rotary Positioners SAR20 Series (Single Axis) Our SAR20 Series Single Axis Positioners are designed and manufactured as providing high positioning accuracy, smooth operation, longevity and reliability. In addition, they manage to deliver high torque characteristics with low weight. SAR20 series have been developed especially for accurate positioning of antennas and electro-optical sensors. All SAR20 Series Positioners are equipped with stepper motors, precision gearboxes and bearings, high resolution encoders with positional feedback. They are also configurable with selectable options. Complete series of the units are ruggedized and suitable for outdoor applications, ensuring troublefree operation. AZIMUTH POSITIONER APPLICATIONS Antenna / Electro-Optical Sensor Positioning Anechoic Chamber Applications Far-Field & Near-Field Antenna Measurements General Purpose Angular Positioning KEY FEATURES Step Motor Powered High Angular Positioning Accuracy Complies MIL-STD-810F Requirements Lightweight, Rugged Design Durable Marine-Grade Finish Wide Operating Temperature Range Positional Control Software RS485 Communication, Closed Loop Control POLARIZATION POSITIONER www.letra.com.tr ©2022 Letra Co, Ltd. All rights reserved.

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SAR20 Azimuth Positioners and Polarization Positioners-2

Rotary Positioners SAR20 Series (Single Axis) TECHNICAL SPECIFICATIONS Model Designation Azimuth / Polarization Delivered Torque Max. Speed Accuracy Repeatability Resolution Distance Between Hard Limits General Major Dimensions (Side Brackets Included) Turn Table Dimensions Weight (Side Brackets Included) Operating Temperature Body Fasteners Exterior Finish Electrical Operating Voltage Motor Power Consumption ( Moving) Motor Power Consumption (Holding State) Heater Power Consumption Incremental Encoder Absolute Encoder Slip Ring Power off Brake Environmental Operating Temperature Storage Temperature...

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SAR20 Azimuth Positioners and Polarization Positioners-3

Rotary Positioners SAR20 Series (Single Axis) SYSTEM SCHEMATIC DIAGRAM Data & Power 110-220 VAC MS Windows Based Software Positioner USB Data Input Methods i. Manual ii. MODBUS/SOCKET API from Local Host or Remote PC Control Box (Indoor) Main PC Unit (Indoor) Turntable Diameter Turntable Height Base Flange Diameter Side Bracket Width Side Bracket Length Rot. Axis Dist. from Mounting Surface www.letra.com.tr ©2022 Letra Co, Ltd. All rights reserved. Updated Jul. 24, 2022 Specifications are subject to change without notice

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SAR20 Azimuth Positioners and Polarization Positioners

SAR20 Azimuth Positioners and Polarization Positioners

Catalog excerpts

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