Communications
Communicate with up to four high-speed serial ports via DNP3, Modbus, or SEL protocols. Three EIA-232 ports are standard; one EIA-485 or EIA-232 port is optional.Time-Tagged SER
Connect a precise time source, and time-tag alarm events to the nearest millisecond. Report time-tagged messages with DNP3 or the SEL Fast SER protocol.Comprehensive Annunciation
Select from six International Society of Automation (ISA-18.1) standard sequences. Implement other ISA sequences with new custom sequence settings. Superbright LEDs provide an easily visible alarm indication in any lighting condition. Red or amber bicolor LEDs add flexibility.Logic Processing
Create custom alarm conditions using programmable logic to combine inputs and communications data without costly wiring.Reliability
Meet the demands of your harshest environments. The SEL-2533 exceeds stringent vibration, electrostatic discharge, electromagnetic interference, and temperature requirements.Configurable Labels
Print custom alarm labels using the terminology that matches your application. Easily reprint labels to accommodate expansion, reconfiguration, or other changes.