ABB REX 521 - Input Selectors

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1MRS751802-MUM

Protection Relay

Technical Reference Manual, Standard Configurations

REX 521

Fig. 4.1.-1 Digital input signals are routed via selectors and switchgroups to the

function blocks (DI1 in the figure) or to the different functions (DI2 in

the figure)

4.1.1. Input selectors

Each digital input (DI1...DI9) can be routed to a specified input signal by the settings

in the input signal menu (Main menu\Configuration\Input Signals).

Only one digital input per input signal can be selected. Refer to Chapter 5.

Parametrization of the digital inputs.

Selector

DI1

SWGRP

Reset EF

Reset Iub

Reset OC

etc.

Input selectors

Switchgroups

Function blocks

InputGen

I>>

I>>>

Io>

Io>>

Io>>>

Iub

Selector

DI2

Master trip

Lockout reset

Open

etc.

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