ABB Relion 670 Series Applications Manual page 54

Section 3
Configuration
This configuration is used in double breaker arrangements.
Control, measuring and interlocking is fully configured, including communication with other bays
such as other lines and the bus coupler over GOOSE.
The following should be noted. The configuration is made with the binary input and binary output
boards in the basic IED delivery. In many cases this is sufficient, in other cases e.g. with full control
of all apparatuses included more IO cards are required. Our proposal for a full version with control
is to use two binary input modules and one or two binary output modules. For systems without
Substation Automation a second binary output board might be required.
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1MRK 511 358-UUS A
Application manual