Allen-Bradley 857 User Manual

Rockwell Automation Publication 857-QS001B-EN-P - April 2017 21
Chapter 3
Local Panel User Interface
Protection System Front
Panel
Figure 4 shows the front panel of the Allen-Bradley® 857 Protection System
and the location of the user interface elements that are used for local control.
Figure 4 - Front Panel of Allen-Bradley 857 Protection System
1. LCD dot-matrix display.
2. Keypad.
3. Status indicators.
4. RS-232 serial communication port for connection to a personal
computer.
The Display
The back lit 128x64 LCD dot-matrix display can show 21 characters per row
and eight rows simultaneously. The display shows:
• The single-line diagram of the relay with the object status, measurement
values, identification, and so forth (Figure 7
).
• The configuration and parameterization values of the relay (Figure 8
).
To turn on the backlight, press any key on the front HMI of the relay.
857

Allen-Bradley 857 Specifications

General

Brand	Allen-Bradley
Model	857
Category	Protection Device
Language	English