DESIGNER’S HANDBOOK 4189350049C EN
Page 153 of 206
11.11.1 Product-related events
The
“PP Relay active” function defines which product-related events the relay must be controlled by (control event).
The following event selections are available: disabled, XDi warning, XDi caution or XDi warning & caution.
It is the same warnings that the XDi presents in an amber (orange) pop-up on the display, and cautions are the
ones presented periodically in a yellow pop-up.
Warnings are the reporting of more important issues like CAN bus errors and data lost, but it can also be if the
power supply is low in a system with single power supply.
Where cautions are minor issues that may become important if not acted on, for example if one of the power supply
lines in a redundant powered system is low or missing. This is not an important problem as long as the second
power supply is OK.
Some of the warning/caution functions can be set ON/OFF in the user menu, and this will affect the relay function
accordingly. (Turning off sound on warnings and cautions does not affect the relay function).
11.11.2 Relay mode
The relay mode defines the relay idle state. There are two modes:
-
Normal de-energised (ND); the relay is not
activated as long as the control event is “False”.
-
Normal energised (NE)
, the relay is activated as long as the control event is “False”.
When NE is used, the relay contact will be activated when the XDi is powered up and for as long as the relay
control event
is “False”. This means that both supply power dropout and control event “True” will change the relay
state. This is often used where the relay is used for important warnings or even in some cases alarms, I a
customized XDi is designed into a system using this functionality.
11.11.3 Relay event mode
The relay mode defines how the relay acts on the event that is set up to activate the relay function. Selecting the
right mode and timing parameters can adapt the function to different applications.
