Quality Products
Our products are rigorously tested and cleaned, backed by a 2-year DO Supply warranty.
DO Supply is a global automation parts reseller focused on hard-to-find and obsolete industrial automation products. Based out of Raleigh, NC, we service customers worldwide, providing excellent customer and sales support, as well as offering our top-of-the-line warranty on all parts sold.
Our products are rigorously tested and cleaned, backed by a 2-year DO Supply warranty.
We offer various shipping options from UPS, FedEx Priority Overnight, DHL and similar. We also ship internationally via DHL, FedEx, and UPS.
While other automation experts have some expertise, we have nearly half a century, allowing us to help you find the ideal replacement or repair solution.
We are a leading global supplier of industrial automation replacement parts, dedicated to providing expert support, speed, and reliability. We offer a huge inventory of need-it-now surplus PLCs, drives, motors, HMIs, and more. Trusted worldwide, we supply parts from 1981 to today by manufacturers such as Allen Bradley, GE, Eaton Cutler Hammer, Mitsubishi, Johnson Controls, and more. With an extensive inventory of surplus products, we are sure you will find what you are looking for. Our commitment to quality and service is reflected in our A+ Better Business Bureau rating. We guarantee prompt delivery and responsive support, empowering businesses to streamline operations and enhance productivity through reliable automation solutions
We pride ourselves on being your need-it-now destination, specializing in immediate solutions for hard-to-find and obsolete replacements for PLCs, drives, motors, HMIs, and more.
Save money with our repair service backed by a 2-year DO Supply warranty, serviced by US-based technicians.
As industrial automation specialists, we focus on top brands like Allen Bradley, GE, Eaton Cutler Hammer, Mitsubishi, and Johnson Controls, sourcing hard-to-find and discontinued parts. Our dedicated team ensures quality through meticulous testing and repairs. With fast shipping and exceptional customer service, we offer a seamless experience. Plus, our in-house repair technicians provide repair services for most products.
Discover insightful industry knowledge
Choosing the right PLC is one of the most important decisions in an automation or infrastructure project. A well-designed PLC can help minimize commissioning time, reduce stability problems during long-term operation, and lower maintenance costs. In energy-intensive applications, PLCs do more than handle basic logic. They may also support energy optimization, multi-VFD coordination, system monitoring, and long-term lifecycle reliability. The system requirements should drive the PLC selection, not the brand name alone. Start by determining how many I/O points the application requires. A small machine may only need a few dozen I/O points, while a tunnel, pump station, or utility system may require hundreds or thousands across ventilation, drainage, lighting, monitoring, and safety-related equipment. In larger systems, distributed I/O, expansion capacity, remote communication, and reliable backplane or network performance become major selection factors. For applications tied into utility...
The question of whether to replace the row of pushbuttons and selector switches on the HMI eventually arises on practically every classic machine or control panel. One touchscreen rather than twenty separate devices seems like a straightforward surface-level alternative. The engineering response is far more complex. The way the operator interface is wired, how PLC logic processes inputs, how data is logged, and how alerts are displayed are some of the key changes. Everything else that comes into contact with the hardwired safety circuit must remain unchanged. The difference between a clean migration and one that results in unexplained PLC logic rewrites, or safety compliance problems mid-commissioning, is to formally distinguish between these two groups before the project begins. Before discussing what changes, it helps to be precise about what a pushbutton panel is doing at the wire level. Each pushbutton, start, stop, jog, and mode select wires a physical contact directly to a PLC...
Conveyor systems serve as crucial circulatory networks in warehouses, airports, mining operations, food processing plants, and manufacturing industries. Well-designed conveyors drastically reduce manual material handling while improving operational efficiency and ensuring consistent output quality. Allen-Bradley PowerFlex drives are essential components of modern conveyor systems, whose performance relies heavily on precise control of the connected motors. PowerFlex drives utilize advanced control modes, including Sensorless Vector Control (SVC), Volts/Hertz (V/Hz), and TotalFORCE technology (available on the PowerFlex 755T series), to deliver high-precision regulation of motor speed and torque. This highly precise motor control enables smooth acceleration and deceleration of conveyor systems, significantly reducing wear and tear on conveyor belts, gearboxes, and bearings by minimizing mechanical shock. Selecting the correct PowerFlex drive helps minimize system downtime, enhance...