Technical Manual
|
Dräger Polytron
®
8000 Series
67
Instrument settings
12.9.4 Setting
fault relay warm-up 1
This function is used to set operation of the fault relay during warm-up 1 to indicate
the warm-up 1 state on the relay output.
1. Select
Settings
>
Instrument
>
Alarm
>
Fault warm up
the desired option and
confirm.
12.9.5
Configuring relay A1 or A2
This function defines whether the alarm relay is energized during normal operation
or energized at an alarm condition.
1. Select
Settings
>
Instrument
>
Alarm
>
Relay A1
or
Relay A2
and confirm.
2. Select the desired option and confirm.
12.9.6 Combinations
of
latching and alarm acknowledgment
The following examples give an overview of relay acknowledgment combinations.
Latching and non-latching signals are not time-limited. Latching signals stay active
until they are acknowledged. Non-latching signals stop as soon as the triggering
condition clears.
static
The fault relay triggers a connected alarm indicator per-
manently.
The orange LED is lit continuously.
dynamic
The fault relay switches state for 9 seconds.
Example:
– A horn is connected to fault relay output Normally
Open.
– Relays are configured as normally energized.
The horn and the orange LED of the transmitter are 1
second active and 9 seconds in-active.
Normally ener-
gized
The relay contact is energized during normal operation
and changes if an alarm is triggered. At a loss of power
this triggers an alarm (fail-safe).
Energ. on alarm
If an alarm is triggered, the relay contact is energized.
Latching
(Manual relay reset)
Non-Latching
(Automatic relay reset after
alarm condition cleared)
Acknowledgeable
Relay reset possible at any time.
Non-acknowledge-
able
Relay reset not possible before alarm condition cleared.
Pre-acknowledge-
able
Alarm acknowledgment possible before the alarm condition
cleared. The relay resets automatically after the alarm con-
dition cleared.
