13
Log Messages On a Local Printer
You can set the SEL-2020 to print selected messages, including control actions, diagnostic status
messages, short event reports, and demand meter data.
Drive a Local Human-Machine Interface With Relay Data
Connect a computer to the SEL-2020 through the computer serial port. Using your own human-
machine interface (HMI) software, you can build screens and specify the HMI data definition.
You can create commands that instruct the SEL-2020 to send selected data to the standard serial
port interface for the HMI package.
External
Output
Contacts
External Relay
Inputs or Auxiliary
Coils
With Optional I/O Board
OUT1
OUT4
Annunciator
ALARM
GND
PS
IN1
IN16
DWG: ds2020-004.vsd
Z05
SEL-2020
(partial)
Z01
+
A09 A39 A01 A07Z03
Z02
A10 A40 A02 A08
Z04
Figure 4: SEL-2020 Typical DC Wiring Diagram
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