Filling the Gap Between Annunciators and High-End Compressor Controllers

FW Murphy has announced the launch of a new product designed to bridge the gap between annunciators and compressor controllers. The C3 Series Centurion Configurable Controller is a control and monitoring system created to provide a balance of features for the mid-market needs of the gas gathering and compression markets. 

Murphy's product line previously consisted of a variety of annunciators for basic shutdown protection, such as the TTD digital annuciator. The Millennium Controller, the company's premiere engine controller, satisfies high end control needs. “Our goal is to round out our product line by offering a controller that fits those advanced compressor and pump applications" said Rick Harris, Oil & Gas Electronic Products Manager at Murphy. "We're going after that area of the market where the TTD annnuciator is not enough controller for requirements and the Millennium is more control than you need." 

The Centurion is primarily aimed at the field gas gathering market, specifically those using screw and reciprocating compressors, and basic pump stations. It was designed mainly for engine driven compressors, but can also be used for many control applications using standard configurations.  

The C3 Series consists of a Display Module, a Main I/O Module, and optional Expansion I/O Module. The Centurion continuously monitors input signals and set points, while also commanding outputs to maintain proper operation. When an out-of-limits event occurs, the controller will stop, shutdown, or control equipment to change conditions. 

The Auto-Start capabilities of the controller also allow for start/stop based on such parameters as pressure set points or by digital signals. 

“Those levels of control give the Centurion a clear edge over regular annunciators,” said Harris. “The Centurion can shut down your equipment, but it will only do so after attempting to change the conditions that can cause failure. That keeps the compressor running nonstop for as long as possible.”

The Centurion provides real-time data with its communications ports to a connected display and supervisory system. This system offers multiple options for remote communications and operation, including HMIs, PLCs, PCs and SCADA systems. The Centurion also uses the standard MODBUS communications protocol, which features greater support for a wide variety of communication equipment including radio and satellite communications systems.

Standardization is a key component of the Centurion, from the inputs and protocols to the user interface. “It's all about standardization,” said Harris. “People are used to seeing proprietary technology on each new product. But we’re taking many different technologies available over the last 20 years and replacing them with a single device with a unified interface.”

The system also includes standard PC ports, including Serial and USB, and Windows-based software for changes and updates.

“Our customers want flexibility at the configuration level and ease of implementation,” Harris said.

Murphy has been conducting field tests since December 2004. The tests include reciprocating and screw compressor applications, plus a pump station installation.

“They fulfill our three key target markets. So far, our feedback has been all positive,” Harris said

The reciprocating compressor field trial is a textbook case study of how Murphy envisions the product’s use and benefits. The company upgraded from a simple annnuciator package to the Centurion. As a result, the company reduced the number of callouts to the site, thereby reducing their manual workload at the site. They also increased throughput on gas production as a result of less downtime.

For more information download the Centurion Configurable Controller Brochure