Dräger REGARD Instructions For Use Manual page 25

REGARD Relay Module & Relay Display Card (ATEX version)
Set relay latch/acknowledge operation
Determines the operation of a relay when the alarm condition clears or when the relay
alarm is acknowledged.
WARNING – when a relay latch mode is set to ACK or LACK, a tripped relay can
be cleared even though an alarm condition may still be present. These latch
modes are generally employed as a convenience to silence audible alarms
while the problem is being addressed.
Mode
ACK
NAK
LACK
LNAK
DNAK
11-7 LATCHING
• Select 11-7
• Enter
Current setting:
• Select new setting (e.g. ACK)
• Select next/previous relay until setting for all
relays configured
• Exit command
Issue 1 – July 2003
Function
Non Latching and Acknowledgeable
Relay returns to non-alarm state when the relay alarm condition has cleared
or the relay alarm has been acknowledged.
Non Latching and Non Acknowledgeable
Relay returns to its non-alarm state when the relay alarm condition has
cleared. Acknowledging the relay alarm whilst the alarm condition is still
true will not reset the relay.
Latching and Acknowledgeable
Relay returns to its non alarm state when the relay alarm is acknowledged.
The relay will not automatically go back to its non-alarm state when the
alarm condition stops.
Latching and Non Acknowledgeable
Returns to its non alarm state when the alarm condition stops and then the
alarm is acknowledged. Acknowledging the relay alarm whilst the alarm
condition is still true will not reset the relay. The relay will not automatically
go back to its non-alarm state when the alarm condition stops.
Delay Latching and Non-Acknowledgeable
Relay returns to its non alarm state when the alarm condition stops and the
alarm has been acknowledged. Acknowledging the relay alarm whilst the
alarm condition is still true will not reset the relay. The relay will
automatically go back to its non-alarm state when the alarm condition stops
if the relay has already been acknowledged.
PRESS DISPLAY
11-7:001
R LATCHING
then
001:LACK
001:ACK
002:DNAK
R 11-7:002
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