Axion Modules

The SEL-2241-2 is a dedicated Real-Time Automation Controller (RTAC) module for the Axion. Use it to integrate I/O, substation IEDs, SCADA communications, and security applications, all in one device

• Integrated web-based HMI
• Available with copper or fiber Ethernet ports

The SEL-2242 is the chassis/backplane for Axion modules.

• Optional 7-inch touchscreen display for bay control (requires SEL-2241 RTAC Module in Slot A)
• Ten-slot chassis for large I/O applications
• Four-slot chassis for small I/O or dual RTAC control applications with a small footprint
• Dual four-slot chassis for rack- or surface-mount dual RTAC with I/O applications
• Rack-, surface-, or panel-mount options

The SEL-2243 is the Axion system power supply. Use a single power coupler in each node when reliable service power is available. For even higher system availability, use redundant power couplers in each node when dual service feeds are available. Additionally, the SEL-2243 provides two dedicated EtherCAT ports to accommodate the integration of multiple nodes.

• Copper or fiber ports for EtherCAT networking
• Low-voltage (24/48 Vdc) or high-voltage (125/250 Vac or Vdc) power supply input ranges

EtherCAT® is a registered trademark and patented technology, licensed by Beckhoff Automation GmbH, Germany.

The SEL-2244-2 module includes 24 optoisolated, dry contact inputs with LED indicators. Up to nine modules may be used in a node.

Includes six input rating options: 24 Vdc, 48 Vdc, 110 Vac/Vdc, and 125 Vac/Vdc.

The SEL-2244-3 module includes 16 contact outputs with LED indicators. Up to nine modules may be used in a node.

• Form A and Form B outputs

The SEL-2244-4 module includes 32 optoisolated, dry contact inputs with LED indicators. Up to nine modules may be used in a node.

Includes four input rating options: 24 Vdc, 48 Vdc, 110 Vac/Vdc, and 125 Vac/Vdc. 

The SEL-2244-5 module includes ten control outputs with LED indication that have high current tripping capacity (10 A) and fast output rise time (<16 µs at 125 V). Up to nine modules may be used in a node.

The SEL-2245-2 module includes 16 inputs that are software-selectable for input ranges of ±20 mA, ±2 mA, or +10 V. Up to 9 modules may be used in a node, and a maximum of 16 analog modules may be used in one Axion system.

The SEL-2245-22 module includes four inputs for measuring 0–300 Vdc signals. This makes them ideal for monitoring battery voltage.

The SEL-2245-221 module provides four inputs for voltage or current monitoring applications. With four low-voltage input channels, this module can monitor a 0.05–22.0 Vrms ac voltage inputs or ±30 V peak dc voltage measurements. This module supports custom per-channel calibration to monitor current measurement from external current transformers (e.g., split-core CT). In dc mode, it can also capture and record measurements from vital components in the substation (e.g., trip coil currents during breaker operations). Additionally, the module records waveform oscillography up to 24 kHz and generates IEEE C37.118 synchrophasors.

The SEL-2245-3 module includes eight software-selectable current or voltage outputs. The outputs are self-sourcing from –20 to +20 mA or –10 to +10 V. This module supports a ramp feature for smooth transitions between set points and supports a clamp feature to prevent driving beyond a desired value. A total of two SEL-2245-3 modules can be installed in one SEL-2242 chassis and up to 16 modules in one Axion system. This module is ideal for proportional-integral-derivative (PID) output controls, analog meter displays, and analog set point delivery.

The SEL-2245-4 module includes four CT and four PT inputs with ranges of 0–22 A and 5–400 V_L-N at a typical accuracy of 0.1 percent. Up to 9 modules may be used in a node, and a maximum of 16 metering modules may be used in one Axion system, all with synchronized measurements for a common reference. Additionally, the module records waveform oscillography up to 24 kHz and generates IEEE C37.118 synchrophasors.

The SEL-2245-411 module includes the same current inputs as the SEL-2245-4 AC Metering Module with four low-voltage inputs to support low-energy analog (LEA) voltage measurements. Deploy this module to monitor power system measurements using LEA voltage transducers. The module’s LEA channels measure 0.05–22.0 Vrms ac voltage inputs. Additionally, the module records waveform oscillography up to 24 kHz and generates IEEE C37.118 synchrophasors.

The SEL-2245-42 module includes three CTs with isolated returns and includes three PTs (or VTs) for measuring ac signals. This module has galvanically isolated inputs and can sample events at user software-selectable rates of 1, 2, 4, 8, and 24 kHz. Up to 16 SEL-2245-42 modules can be used in one Axion system and feature synchronized measurements throughout all modules. This enables time-deterministic control algorithms to take advantage of the common reference for all measurements, even those in distributed locations. Collect IEEE C37.118.1a-2014-compliant synchrophasor data from up to 64 phasor quantities. Provide digital fault recording (DFR) capabilities with the Axion to record and analyze power system dynamics and validate equipment performance.