Access control

To protect the relay from unauthorized access and to maintain

information integrity, the relay is provided with a four-level, role

based authentication system with administrator-programmable

individual passwords for the viewer, operator, engineer and

administrator levels. The access control applies to the local

HMI, the Web HMI and PCM600.

Inputs and outputs

The relay is equipped with three phase-segregated differential

current inputs and one residual current input. The differential

and the residual current inputs are rated 1/5 A, that is, the

inputs can be connected to either 1 A or 5 A secondary current

transformers. The optional residual current input rated 0.2/1 A

is normally used in applications requiring sensitive earth-fault

protection and featuring core-balance current transformers.

The rated currents of the analog inputs can be selected in the

relay software. In addition, the binary input threshold (16…176

V DC) can be selected by adjusting the relay’s parameter settings.

All binary input and output contacts are preconfigured

according to the configuration, but can be easily reconfigured

by setting application-based parameters using the signal

configuration functionality of the local HMI and Web HMI.

See the input and output overview table and the terminal

diagram for more information about the inputs and outputs.