Hardware
PRS-7367 269
6.2 Human Machine Interface Module
The human machine interface (HMI) module is installed behind the front panel of this device. It
contains an LCD screen to modify the protection settings and system parameters and display
information of this device, including the analogue quantities, the running status and event lists.
The menus are showed as tree structure, which facilitates the users to enter any specific menu.
After entering the menu, the big LCD show all the relevant information in one screen, making it
easier to get all the information.
6.3 Power Supply Module
The power supply module contains a small voltage converter with enough electrical insulation
between the converter and the input/output terminals. A wide range input voltage is provided due
to the sophisticated circuit design. The output voltage from the voltage converter are continuously
monitored to ensure the stability and safety.
The power supply module provides 13 binary outputs, some dry contacts, which conduct the signal
functions showing the operating conditions (device error) or tripping and closing commands
(protection, auto-reclose or remote control). The specific function is performed by setting the
relevant settings and wiring the external copper cable.
Except for the Dev_Err Cls and Dev_Err Open output contacts (fixed as indication output contacts),
all the other binary inputs or outputs can be visually and flexibly configured through the PRS IED
Studio configuration tool, which determine what information do they transmit between the CPU
module and PWR module.
The frame of all the power supply module terminal are shown below.
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