SEL-2240 Axion®0 pages

SEL-2240 Axion
Rugged Digital I/O, Analog Inputs, Current
and Voltage Measurements, and Control for
Your Toughest Applications

The SEL Axion® is a fully integrated modular digital I/O, analog input, current and voltage measurements, and control
solutions suitable for many utility and industrial applications. It combines the communications, built-in security, and
IEC 61131 logic engine of the SEL Real-Time Automation Controller (RTAC) family with a durable suite of I/O
modules that provide high-speed, deterministic, control performance over an EtherCAT® backplane.

Major Features and Benefits
➤

High-Speed and High-Accuracy DC Analog Control. The Axion DC Analog Output module provides high-accuracy current and voltage control signals for low-level self-wetted (sourcing) control
applications.
➤ Proportional Integral Derivative (PID) Control. The PID function block provides advanced closedloop control for analog set points commonly used in generator and process control.
➤ Synchronized Current and Voltage Measurements. The Axion CT/PT module provides high-accuracy current and voltage measurements with the advantage of synchronized measurements. Multiple
CT/PT modules in an Axion system sample all measurements at the same time to ensure a common
reference for all voltages and currents. This enables many time deterministic control applications without performing additional processing to align the measurements to a reference. Utilize this capability
to accomplish complex control schemes including load shedding, microgrid control, and autosynchronization.
➤ Top of Second Synchronized Measurements. When connected to IRIG, the Axion synchronizes the
measurement of all CT/PT modules to the top of the second. This enables Axions in geographically
dispersed locations to run algorithms on voltage and current measurements and provide time-aligned
data from all of the Axion modules. This expands time-deterministic control capability to wide-area
applications since the CT/PT measurements from multiple Axion systems are all synchronized.

Schweitzer Engineering Laboratories, Inc.

SEL-2240 Data Sheet