Top Compartment With Hinged Cover; Keypad; Liquid Crystal Display; Front Serial Port (Sk1) - GE MiCOM P747 Agile Technical Manual

Chapter 3 - Hardware Design
4.1.1

TOP COMPARTMENT WITH HINGED COVER

The top compartment contains labels for the:
● Serial number
● Current and voltage ratings.
The bottom compartment contains:
● A compartment for a 1/2 AA size backup battery (used for the real time clock and event, fault, and
disturbance records).
● A 9-pin female D-type front port for an EIA(RS)232 serial connection to a PC.
● A 25-pin female D-type parallel port for monitoring internal signals and downloading high-speed local
software and language text.
4.1.2

KEYPAD

The keypad consists of the following keys:
4 arrow keys to navigate the menus
An enter key for executing the chosen option
A clear key for clearing the last command
A read key for viewing larger blocks of text (arrow keys now used
for scrolling)
2 hot keys for scrolling through the default display and for control
of setting groups
4.1.3

LIQUID CRYSTAL DISPLAY

The LCD is a high resolution monochrome display with 16 characters by 3 lines and controllable back light.
4.1.4

FRONT SERIAL PORT (SK1)

The front serial port is a 9-pin female D-type connector, providing RS232 serial data communication. It is
situated under the bottom hinged cover, and is used to communicate with a locally connected PC. it has two
main purposes:
● To transfer settings data between the PC and the IED
● For downloading firmware updates and menu text editing
The port is intended for temporary connection during testing, installation and commissioning. It is not
intended to be used for permanent SCADA communications. This port supports the Courier communication
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MiCOM P747
P747-TM-EN-1
P747-TM-EN-1.1