You are viewing this page in an unauthorized frame window.
This is a potential security issue, you are being redirected to https://csrc.nist.gov.
An official website of the United States government
Here’s how you know
Official websites use .gov A
.gov website belongs to an official government
organization in the United States.
Secure .gov websites use HTTPS A
lock (
) or https:// means you’ve safely connected to
the .gov website. Share sensitive information only on official,
secure websites.
The SEL-3021 Serial Encrypting Transceiver is an EIA-232 bump-in-the-wire encryption module. Use the SEL-3021 to protect meters, protective relays, Programmable Logic Controllers (PLC), Remote Terminal Units (RTU), and computers from unauthorized access.