6.8 Binary Input/Output Module
The IO module provides 14 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.
The IO module also contains 8 binary inputs, the optical isolated input terminals, which can
perform different monitoring functions, such as detecting the breaker and switch positions of the
corresponding bay. All the BI terminals can be used as general purpose binary inputs or special
purpose (protection function or control function) binary inputs.
All the binary inputs and 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 BO module.
The frame of the IO module terminal definition is described as below.