Hardware Architecture; Figure 4: Hardware Architecture - GE MiCOM P40 Technical Manual

Chapter 3 - Hardware Design
2

HARDWARE ARCHITECTURE

The main components comprising an General Electric Sampled Values device are as follows:
The housing, consisting of a front panel and connections at the rear
●
The Main processor module consisting of the main CPU (Central Processing Unit), memory and an interface
●
to the front panel HMI (Human Machine Interface)
A selection of plug-in boards and modules with presentation at the rear for the sampled values inputs,
●
power supply, communication functions, digital I/O and time synchronisation connectivity
All boards and modules are connected by a parallel data and address bus, which allows the processor module to
send and receive information to and from the other modules as required. There is also a separate serial data bus
for conveying sampled data from the input module to the CPU. These parallel and serial databuses are shown as a
single interconnection module in the following figure, which shows typical modules and the flow of data between
them.
Keypad
LCD
LEDs
Front port
Flash memory for settings
Battery-backed SRAM
Watchdog
contacts Watchdog module
+ LED
Auxiliary
Supply
Note: Not all modules are applicable to all products
V00280

Figure 4: Hardware architecture

32
Memory
for records
PSU module
Output relay boards
Opto-input boards
I/O
IEC 61850-9-2LE
input board
Sample Value Inputs
RS485 modules
IRIG-B module
Ethernet modules
Communications
P446SV
Output relay contacts
Digital inputs
Sampled Values
RS485 communication
Time synchronisation
Ethernet communication
P446SV-TM-EN-1