A well-known global petroleum company has recently upgraded the remote control and monitoring system at its Belgium manufacturing site. The two main goals of the upgrade are to create a centralized control system, and maintain a reliable communication network. The procedure used to refine oil products requires careful attention to the temperature and pressure. In addition, by their very nature, refineries make use of inflammable materials that could be exposed to direct sunlight duringthe daytime. In order to ensure the safety of the plant, systems must be well-designed so that sparks cannot reach inflammables, and it is necessary to use rugged devices for the monitoring and management system.
The company wanted the upgrade to provide sufficient bandwidth for all current as well as future information needs. This not only included current data supplied to a central control room for operations, engineering, and maintenance, but also a system that could support voice, video monitoring, and security infrastructure that could be expanded later when needed.
The control and monitoring system was separated into seven individual units for each monitoring and control cell. For long distance communication between cells, a single mode fiber optic network connected key devices and the control center. The system integrator set up a DCS for temperature and pressure monitoring. Signals were collected and transmitted to the control room through a redundant single mode fiber network created by Moxa's ED6008-S-SC-T Ethernet switches. For sites that were not easily reachable, Moxa's IMC-101-S-SC-T Ethernet-to-fiber converters were used to achieve greater communication distances. Since monitoring cells were in close proximity to high-temperature refinery areas, all devices were required to operate under the Class 1 Zone 2 standard. Extremely high reliability was also required, since operation was primarily unmanned and any troubleshooting would be extremely difficult. The ED6008-S-SC-T and IMC-101-S-SC-T were selected for their rugged design, fan-less operation, high MTBF ratings, and wide operating temperatures (-40 to 75°C).
Engineers now had complete control over all tank operations, and could configure automatic alerts for immediate notification of critical events. The improvements to the communications, safety, and security infrastructure were significant. Fewer people were required to monitor all storage facilities, and it was much easier to additional items such as remote cameras or other monitoring (I/O) devices to the network.
Industrial-grade network for centralized monitoring and control
Div.2/Zone 2 certification for use in explosive environments
Single-mode fiber optic media for long distance transmission
Wide temperature models for reliable operation under extreme temperature conditions
(-40 to 75°C)
High MTBF due to fanless operation and low-power design
(230,000 hrs for ED6008; 810,000 hrs for IMC-101)
IP-based operation for easy integration with other systems and applications