GE P642 User Manual

2 HARDWARE ARCHITECTURE
The main components comprising devices based on the Px4x platform are as follows:
● The housing, consisting of a fr
ont 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 power supply,
communication functions, digital I/O, analogue inputs, 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.
Communications
Analogue Inputs
I/O
I
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Output relay boards
Opto-input boards
CTs
VTs
RS485 modules
Ethernet modules
Keypad
LCD
LEDs
Front port
Watchdog module
PSU module
Watchdog
contacts
+ LED
Auxiliary
Supply
IRIG-B module
P
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m
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F
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H
M
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Output relay contacts
Digital inputs
Power system currents
Power system voltages
RS485 communication
Time synchronisation
Ethernet communication
V00233
Note: Not all modules are applicable to all products
Memory
Flash memory for settings
Battery-backed SRAM
for records
Figure 3: Hardware architecture
Chapter 3 - Hardware Design P64x
30 P64x-TM-EN-1.3

GE P642 Specifications

General

Brand	GE
Model	P642
Category	Relays
Language	English