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Introduction
857-UM001A-EN-P – July 2009
User Interface
The relay can be controlled in three ways:
•
Locally with the push-buttons on the relay front panel
•
Locally using a PC connected to the serial port on the front panel
or on the rear panel of the relay (both cannot be used
simultaneously)
•
Via remote control over the remote control port on the relay rear
panel.
Operating Safety
The terminals on the rear panel of the relay may
A T T E N T I O N
A T T E N T I O N
carry dangerous voltages, even if the auxiliary
voltage is switched off. A live current
transformer secondary circuit must not be
opened. Disconnecting a live circuit may cause
dangerous voltages! Any operational measures
must be carried out according to national and
local handling directives and instructions.
Carefully read through all operation
I M P O R T A N T
I M P O R T A N T
instructions before any operational measures
are carried out.
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