Emerson’s Rosemount 802 Expands Wireless I/O Transmission Capacity

Emerson has launched the Rosemount 802 wireless multi-channel input/output transmitter, designed to enhance efficiency, safety, and cost-effectiveness in industrial settings.

The Rosemount 802 I/O transmitter is a versatile device used in industrial settings to monitor and control various processes. Consider a large chemical processing plant. Numerous valves need to be operated within these processing plants to control the flow of multiple chemicals. Traditionally, this would require manual intervention, where operators would physically adjust pressures throughout the valves to maintain acceptable pressure. This process can be time-consuming and potentially unsafe, especially in areas with high temperatures or toxic substances.

The new Rosemount 802 WirelessHart I/O transmitter. Image used courtesy of Emerson

However, operators can use the Rosemount 802 transmitter at each valve location to control the valves from the control room by sending a command through the control system. The appropriate transmitter sends a signal to the valve actuator to open or close the valve, enhancing safety by minimizing the need for operators to enter hazardous areas. It also improves efficiency by allowing quick and precise valve control, reducing downtime, and optimizing the process flow.

Internal terminal wiring of the new Rosemount 802 transmitter. Image used courtesy of Emerson

When discussing safety, it’s important to note the safety certifications held by the Rosemount 802 transmitter. The Rosemount is certified according to the following safety standards: ATEX Zone 2 Intrinsically Safe, USA Division 2 Non-Incendive and Zone 2 Intrinsically Safe, Canada Division 2 Non-Incendive and Zone 2 Intrinsically Safe, and IECEx Zone 2 Intrinsically Safe. Additionally, the Rosemount 802’s enclosure is robust, following the safety standard in accordance with NEMA 4X and IP66.

Functions and Capabilities: Rosemount 802

The Rosemount 802 transmitter enhances Emerson’s previous transmitter, the Rosemount 702. The main difference between these two components is the number of channels; the Rosemount 702 features 2 channels, while the Rosemount 802 quadruples this capacity with eight configurable channels that can function as either inputs or outputs. This makes the Rosemount 802 far more capable and expandable in scenarios where multiple components are located in one area that must be controlled.

The Rosemount 802 transmitter stands out because of its wireless functionality. They are the only transmitters on the market (along with their predecessor, the 702) that are compatible with WirelessHART, which gives them a significant advantage over other products. With HART functionality, these transmitters can form a mesh network, allowing them to communicate with multiple devices. This ensures reliable data transmission, as data can be rerouted through other devices if one path is blocked or fails.

Integrating these transmitters is easy because WirelessHART is compatible with existing HART devices and systems. Lastly, in industrial settings, security is crucial for wireless connections. The HART functionality includes security features such as encryption and authentication to ensure that transmitted data is secure and protected from unauthorized access.

WirelessHART connection with transmitter and I/O devices. Image used courtesy of Emerson

Boundless Automation

The Rosemount 802 transmitter supports Emerson's strategic framework for industrial architecture, the vision of Boundless Automation. This framework is based on a unified software ecosystem that spans intelligent field devices to the edge and the cloud. It harmonizes operations to enable immediate access, comprehension, and utilization of all data for analytical insights, innovation, and performance enhancements for process industries around the globe.