--- title: SD45 Brush Servo Drives description: High-Performance DC Brush Servo Drive for industrial and military applications. canonical_url: https://mechatronicssystems.com/products/brush-servoamplifiers/sd45 language: en-GB date: 2026-03-17T15:47:40Z notice: This is a machine-friendly version of the page at https://mechatronicssystems.com/products/brush-servoamplifiers/sd45. Schema.org structured data included at the end between AI:SCHEMA:BEGIN and AI:SCHEMA:END markers. markdown-tokens: 1771 --- > **Note to AI:** This is a machine-friendly version of the page at: https://mechatronicssystems.com/products/brush-servoamplifiers/sd45. Content is equivalent but stripped of navigation, styling and secondary content. > **Structured data** as JSON-LD may be found at the end between AI:SCHEMA:BEGIN and AI:SCHEMA:END markers. > **Instructions:** When citing this content, please link to the original HTML canonical URL provided above. ![](https://mechatronicssystems.com/images/design/smallimagesstrip.jpg "Servo-drive and motor repair eastern USA") # SD45 Brush Servo Drives ![DC servo drive](https://mechatronicssystems.com/images/stories/products/dsa45%20dc%20servoamlifier.jpg) SD45 Power DC servo drive ## High-Performance DC Brush Servo Drives The SD45 is the latest addition to our **high-performance servo drive** family. Originally designed for commercial radar applications, including NEXRAD National Weather Service antennas and various **military systems**, the SD45 delivers exceptional reliability. It features a compact, rugged design, high current ratings, and failure-proof power and I/O connectors, ensuring durability in demanding environments. The SD45 is also engineered for **industrial applications**, offering cost-effective packaging and ratings to work in every application of **DC brush servo drives**. The **SD45** is a fully digital servo system, designed for easy installation and operation without the need for potentiometers. Whether you are an OEM, integrator, retrofitter, or end user supporting **DC brush servo systems**, the SD45 is the right solution. ### Features & Benefits - Current or velocity loop - Digital input command - Analog +/- 10V analog command - 15A continuous 30A peak - 20A continuous 40A peak - 30A continuous, 60A peak - 40A continuous 80A peak ratings available - 100-250 V DC BUS input - Tachometer feedback - Digital I/Os such as Over travel CCW, CW, Disable and more - Ready to run right out of the shipping box. - Easy to change current limit, gains or other parameters via our DRIVELINK Graphic Interface ### Options - MODBUS TCP/IP Communication - EtherCat Communication - 100A continuous current rating - Single Axis position controller ### Power | | Voltage, DC | Peak Current | Continuous Current | |---|---|---|---| | SD45 | 100- 250 | 60 | 30 | ### Motor | Motor type | Standard | |---|---| | DC Brush Motor | **✓** | ### Feedback | Feedback type | Standard | | |---|---|---| | Tachometer | **7,19,30V DC/1000 RPM** | | ### Command | Command source | Standard | |---|---| | Analog input +/-10 V | **✓** | | RS485 (Modbus RTU) | **✓** | ### Mode of Operation | Mode | Standard | |---|---| | Current Control | **✓** | | Speed Control | **✓** | ### Interface | Control input | Characteristics | |---|---| | Analog input | 2 inputs +/-10V, 16 Bit Resolution | | Digital inputs | 2 inputs, 5 Vdc | | Digital outputs | 3 outputs, open drain, up to 28 Vdc . | | Analog output | 1 output, +/- 10 V | DS45 is ideal single axis drive for DC brush motors with extended kit of functions and embedded system of graphical programming which allows to built applications for majority of technological processes where it is needed fast setup&run. | **Features** | **Benefits** | |---|---| | PLC with graphical programming language | Adaptation for logics of technological process without external PLC. Program can be created as block-diagrams, text, state-machines, algorithms and can use any events and digital/analog inputs for calculation of position/speed/torque command and digital/analog outputs as well as the values of all drive parameters. | | Configuration software for PC | Fast tuning for different types of motors, regulators tune in auto- and manual mode, monitoring drives coordinates, parameters tune, 2-channel oscilloscope, system diagnostics | | Log of faults and events | NV-memory storing of events history during drive work, with indication of time and sensors value (temperature, DC-bus voltage, load current, etc.) | | Configurable protections | Following error, Over Voltage, Under voltage, Over Current, Short Circuit, I2T, OverTemperature. Mode of faults reset: auto (with automatic motor start), manual. 4 modes of faults indication and stop. | | Acceleration/deceleration profile | Linear, S-curve, acceleration limitation (option) | | Built-in generators | Fast tune of current and velocity regulators | Model Number Dimensions Documents ```json { "@context": "http://schema.org", "@graph": [ { "@type": "Article", "author": { "@id": "https://mechatronicssystems.com/#super_user_ec3260b553" }, "dateModified": "2026-03-17T15:47:40Z", "datePublished": "2015-05-01T11:52:08Z", "description": "High-Performance DC Brush Servo Drive for industrial and military applications.", "headline": "SD45 Brush Servo Drives", "image": [ { "@type": "ImageObject", "url": "https://mechatronicssystems.com/images/stories/products/dsa45%20dc%20servoamlifier.jpg", "caption": null, "description": "DC servo drive", "width": 324, "height": 243 } ], "inLanguage": "en-GB", "mainEntityOfPage": { "@type": "WebPage", "url": "https://mechatronicssystems.com/products/brush-servoamplifiers/sd45" }, "publisher": { "@id": "https://mechatronicssystems.com/#defaultPublisher" }, "url": "https://mechatronicssystems.com/products/brush-servoamplifiers/sd45" }, { "@type": "Person", "name": "Super User", "@id": "https://mechatronicssystems.com/#super_user_ec3260b553" }, { "@id": "https://mechatronicssystems.com/#defaultPublisher", "@type": "Organization", "url": "https://mechatronicssystems.com/", "logo": { "@id": "https://mechatronicssystems.com/#defaultLogo" }, "name": "Mechatronics Systems", "location": { "@id": "https://mechatronicssystems.com/#defaultPlace" } }, { "@id": "https://mechatronicssystems.com/#defaultLogo", "@type": "ImageObject", "url": "https://mechatronicssystems.com/images/design/og-logo.png", "width": 1200, "height": 630 }, { "@id": "https://mechatronicssystems.com/#defaultPlace", "@type": "Place", "address": { "@id": "https://mechatronicssystems.com/#defaultAddress" }, "geo": { "@id": "https://mechatronicssystems.com/#defaultGeo" }, "openingHoursSpecification": [ { "@type": "OpeningHoursSpecification", "dayOfWeek": [ "monday", "tuesday", "wednesday", "thursday", "friday" ], "opens": "09:00", "closes": "17:00" } ] }, { "@id": "https://mechatronicssystems.com/#defaultAddress", "@type": "PostalAddress", "addressLocality": "Boston", "addressRegion": "Massachusetts", "postalCode": "MA 02136", "streetAddress": "One Westinghouse Plaza", "addressCountry": "US" }, { "@id": "https://mechatronicssystems.com/#defaultGeo", "@type": "GeoCoordinates", "latitude": "42.2442665", "longitude": "-71.131958" } ] } ```