Product Overview
The National Instruments cFP-2120 is a controller for Compact FieldPoint systems. It is designed to run embedded measurement and control applications close to sensors and actuators in industrial environments. The controller combines a processor, a real time operating system, network communication, and support for Compact FieldPoint I/O modules in a rugged package that can be mounted in cabinets and machine enclosures.
Compact FieldPoint is a distributed I/O platform that places signal conditioning and I/O modules near the point of measurement. The cFP-2120 acts as the processing and communication center for a Compact FieldPoint bank. It executes application logic, reads inputs, writes outputs, and exchanges data with supervisory systems over a network.
Real Time Processing
The controller includes a processor running a real time operating system. Real time operation provides deterministic timing for control loops and data acquisition tasks, so critical operations are not delayed by network activity, file access, or user interface functions. This is important in closed loop control and in monitoring applications that must respond within defined time limits.
Applications are developed with LabVIEW Real Time and deployed to the controller. Engineers can build acquisition loops, apply scaling and filtering, implement control logic, log data, and communicate results over the network. Once deployed, the controller manages the application independently of a host computer.
Compact FieldPoint I/O Architecture
The cFP-2120 supports Compact FieldPoint I/O modules installed on a compatible backplane. These modules include analog input, analog output, digital input and output, thermocouple input, and other specialty types. Module selection determines the channel count, signal range, isolation, and resolution of the system.
The distributed design allows the I/O bank to be mounted near the process. This shortens sensor cables and reduces noise pickup compared with routing every signal back to a central cabinet. Engineers should verify that the backplane and power supply support the number and type of modules in the planned system, and should document module positions and channel mapping.
Network Communication and Remote Access
The cFP-2120 provides Ethernet communication for programming, monitoring, and integration with enterprise systems. Ethernet allows the controller to exchange data with host computers, databases, and supervisory systems. Network connectivity allows engineers to deploy the controller near the measurement point and access it from a host computer.
Engineers should plan network addressing, access control, and traffic patterns to ensure reliable operation. Isolating the control network from general office traffic and limiting access to authorized hosts reduces the risk of interference. Local buffering of data protects against brief network interruptions.
Industrial Installation
The cFP-2120 is designed for industrial installation. It should be mounted where the operating temperature range is respected and where the enclosure protects against moisture, dust, and contaminants. DIN rail mounting is common for Compact FieldPoint hardware, and engineers should leave clearance for wiring and ventilation.
Proper grounding and shielding are important for reliable communication and measurement. Signal and network cables should be routed away from power conductors, and shields should be terminated according to the documentation. Power should be supplied within the specified range with protection against transients where required.
Typical Applications
Distributed industrial measurement and control
Remote monitoring in process areas
Machine and utility control systems
Environmental and facility data acquisition
Legacy Compact FieldPoint system expansion
Industrial test stands with spread out sensors
The cFP-2120 provides a Compact FieldPoint controller with real time processing and Ethernet communication. Its distributed architecture and industrial design make it suitable for measurement and control applications where sensors are spread across a facility.
