The Leader in VFDs, PLCs, and Motors & Controls


Leaders       Bios      Success Stories        Employment 


Industry Leaders

Delta Automation, Inc., located in Richmond Virginia, is an Industry Leader in:
Industrial Electronics Remanufacturing (depot type repair), On-Site Field Service, New Equipment Sales, and Mature Equipment Sales. Our focus is on Programmable Controllers (PLCs), Drives (VFDs), Control Screens (HMIs) and Peripheral Hardware Support (to include, Software & Firmware). With over 50 years of Repair and Support, we proudly offer our services.

Our large inventory of New stock products are ready to ship. Our inventory of surplus and used PLC, VFD, and HMI equipment and Products are purchased through liquidation plant closings or process control upgrades and replacements. All equipment is thoroughly tested and meets stringent Delta Automation, Inc. quality control procedures. This equipment is available for sale and carries a one year warranty. Call Delta Automation, Inc. today for any of your new or refurbished equipment needs.

For Emergencies Call Toll Free: 1-888 PC DELTA using extension 155

  • In stock parts for sale or exchange – Current products as well as mature parts and systems.
  • We perform memory, processor, processing speed, communications and upgrades.
  • Pre-made & tested Remote I/O Drop Cables, MB Plus Cables, servo motor cables, & all other types of industrial automation cables in stock.

Delta’s Sales, Service, Repair & Support Include:
ABB, Allen-Bradley, Baldor, Cutler-Hammer/Eaton, DanFoss, GE, Getty Motors, I2T, Modicon, Gould, AEG, Schneider Automation, Square D Drives, Symax & Square D PLCs, Trans-Coil, Toshiba, Weed, 3M & EOtech, Vacon, WEG, WEG Motors, Yaskawa.

Visit Our Online Store

SWAM Certified SBE WBENC EVA Certifications


Corporate Bios

Corporate Bios:

Delta Automation Inc., is a corporation with a rich heritage in providing solutions that meet and exceed current standards in PLC and VFD Repair, Service and Sales. From the small departments to the large global enterprises, we have a solution for you. Our corporation is entrusted to those who care and we care about them. In each corporate bio you will find necessary contact information, credentials and department type.

Please feel free to contact us regarding sales, service, repair or training.

Margarete Culley: CEO

Margarete Culley, CEO of Delta Automation Inc., leads Delta utilizing all of her knowledge gained while employed as an engineering/construction project management leader for a leading chemical manufacturer.

Email Margarete Culley

Additionally, she handles the human resources department with the resources and skills gained while employed with a large firm which recruited engineering candidates needed for projects in large firms. Her other areas of responsibility include: final approval of all Delta projects and financial issues, marketing analysis and direction, accounting department supervision and, all employee related issues.

Bob Culley: President

Our President: Bob Culley
Email: Bob Culley

Bob Culley, President of Delta Automation.

After completing his formal training in industrial electronics, Bob performed the tasks of a bench technician, and running a repair department. He was a field service engineer for a large international manufacturer of cigarette production equipment. His responsibilities included maintaining equipment for the high production and high-pressure goals of the tobacco industry in all areas of the world. He was also a technical specialist for the worlds largest chemical corporation.

Bob joined Gould/Modicon in 1982 as a field service engineer responsible for the Virginia area. Bob was troubleshooting systems throughout the East coast within weeks. After a year he was promoted to senior field service engineer being tasked with troubleshooting the more difficult problems and assisting other field engineers throughout the country. He worked closely with the factory engineers to locate and rectify any design problems. Bob designed and engineered many field test fixtures and numerous testing procedures still in use today. Bob’s knowledge of Modicon remote I/O and communications network earned him recognition as the company expert.
His expertise was called upon for every large or complex system that Modicon sold or serviced worldwide. Being promoted to a system specialist allowed him to troubleshoot a multitude of systems including those in the most remote parts of the globe. Recognized as an expert in his field, he was commended for his work in all of the countries in which he performed services.

As the corporate raiding of the 90’s began to affect the Modicon
lineage (Gould, AEG, ASA, Square D, Schneider Automation), Bob
recognized the decline of timely, costly and reliable service. Bob decided that the time was right to start a full service third party service company called Delta Automation, Inc., providing the best in component level repairs, field service, training, system design, and start-up service.

Delta Automation, Inc. has no equal in the Modicon PLC arena!

Success Stories

Success Stories:

Our success stories are based on customer applications, case histories and corporations that have secured our knowledgeable services. From fortune 500 companies to the most competitive global companies we have provided solutions, sales and services to many industries. Delta Automation invites you to learn more about our company, the companies we have successfully serviced and how our solutions kept their products going.

Please click on an industry to read about their request, our applications and the total success.


One of the “big three” automotive manufacturers began having communication problems with their Modbus Plus network. This particular plant has a unique Modbus plus system in that it has over six hundred nodes. This is one of the, if not the, largest Modbus Plus network in the world. Also unique to the system, Bob Culley assisted in its’ initial design and installation while working for Modicon.

The customer first called their local distributor and asked them to call the factory to dispatch a field service engineer to troubleshoot and repair their network. The distributor contacted Delta Automation Inc. They responded with two experienced field engineers and all of the proper and necessary test equipment to the site immediately. After discussing the network problems with the automotive engineers, Delta Automation, Inc. began its testing and troubleshooting. The fault was located in an extremely short time, and was determined to be a revision compatibility problem with the Modbus Plus repeaters. The units were updated and the system was online in minutes, after being down for two days. This is just an example of how Delta Automation’s experience and superior knowledge was able to assist. Most certainly no other third party service company would have been as swift to respond and locate the fault.

Pulp and Paper:

One of the world’s largest pulp and paper manufacturers began experiencing intermittent remote I/O problems with one of its paper making machines. This problem caused the company to lose production on the order of $15,000 per hour. An emergency call was made to the high tech distributor, who made several calls for help.

Delta Automation, Inc. responded with immediate service which was coordinated through the HTAD distributor. A plane was chartered and an engineer with test equipment was dispatched. Within hours, the system was up and running at full production. Several cable faults were localized and repaired. In addition all of the company’s J890’s were found in need of updates.

Delta Automation, Inc. modified over 20 units at its repair facility and delivered them for installation the following day. The success on this paper machine dictated a company standard and modifications were applied to the remaining machines. This paper manufacturer has advised its high tech distributor to utilize Delta Automation, Inc. for it’s future Modicon field service and repair requirements. Delta Automation, Inc. provided the expertise and willingness to respond in a timely, economical fashion with highly qualified and knowledgeable personnel. Delta Automation, Inc. creates a win-win situation, both for the customer and distributor, while building a profitable relationship.

Petrol/Chemical Field:

An oil refinery was utilizing a 584 redundancy system when one of the controllers failed. Because it was a redundancy system the refinery’s process didn’t go down, however; the plant was concerned about running without a hot stand-by unit. He called Delta Automation Inc. for support. He was routed to an experienced engineer that had a vast knowledge of 584 redundancy systems. He described his problem to the engineer in detail and a most likely solution was discussed. The engineer warned the customer about the pitfalls of repairing a 584 redundancy system, all of which was new information to him. Several different scenarios were discussed. The customer decided to take Delta Automation Inc ‘s advice on which route to pursue. The proper parts were flown to the customer site and installed. The redundancy system immediately came up. The plant lost no production time.

Transportation Field:

>A large railroad coal carrier’s train car storage and staging area was the victim of a lightning strike, knocking out all of the yard’s traffic controls, which are controlled by a Modicon 984 and five remote drops operated by Modicon push button assemblies. Delta Automation, Inc. responded immediately with engineers and the proper test equipment. The lightning damage was severe. The Remote I/O system was tested, utilizing Delta Automation, Inc.’s specialized test. All five of the push-button panels were damaged by the strike. Delta Automation, Inc. rushed all five to its facility where the failures were diagnosed and the necessary components were special ordered. The parts arrived the following day. All units were repaired and returned to service at once. Delta Automation, Inc. proved that it had the resources, willingness, capability and experience to locate and repair the customer’s system.

Employment Opportunities

No current openings. Please check back.


Delta Automation Inc.
5120 Glen Alden Drive
Richmond, Virginia, 23231


Delta Automation, Inc., located in Richmond Virginia, is an Industry Leader in Industrial Electronics Remanufacturing (depot type repair), On-Site Field Service, New Equipment Sales, and Mature Equipment Sales. Our focus is on Programmable Controllers (PLCs), Drives (VFDs), Control Screens (HMIs) and Peripheral Hardware Support (to include, Software & Firmware). With over 50 years of Repair and Support, we proudly offer our services.

Link to YouTube Channel

 Copyright 2020 Delta Automation, Inc., All rights reserved / Privacy, Terms & Conditions

 designed by Data Directions