Instruction Manual
ExTox Control Units Series ET-8D and ET-4D2
Page 15 of 39
Series ET-8D: The smoke detector function is activated with parameter "RM" in the gas list.
Please select "100" as measuring range. The alarm levels have to be adjusted to "10", "11"
and "12". Please pay attention to the hints for operation and installation of smoke detectors
in Chapters 5.11 and 8.3.
Series ET-4D2: For configuration of channel "RM" has to be selected as gas type. All further
settings in channel configuration are ignored for smoke detector measuring channels.
Connection of a smoke detector should only be done on measuring channels which have
especially been prepared factory-sided. Connections on the PCB are marked corresponding-
ly. The smoke detector function is activated with parameter "RM" in the gas list. Please pay
attention to the hints for operation and installation of smoke detectors in Chapters 5.11 and
8.3.
4.2
Relay Configuration
Access Level to perform changes of the parameter settings: 2
Menu Text
Selection
Function
Relay
1 to 24 (12)
Selection of Relay for which the triggering conditions
should be fixed.
Reset
On,
Off
Indicates that the relay could be reset manually in case
the triggering conditions are still fulfilled (On). But the
relay is triggered again, if the triggering conditions are
fulfilled again due to another alarm or another fault ("re-
triggering of alarms", see 5.3).
Attention: This function shall only be used for quitting an
acoustic message.
Otherwise the relay is reset automatically if the triggering
condition is no longer fulfilled (Off).
Mode
(+),
(-)
Indicates whether the relay closes (+) or opens (-) on
presence of triggering conditions.
-: the relay closes in measuring operation if there is no
alarm or fault.
+: the relay is open in measuring operation if there is no
alarm or fault.
The setting determines whether an alarm is triggered (-)
or not triggered (+) at the control unit in case of a loss of
power supply. Independently of that you fix by choosing
the change-over contact whether you use the closed cur-
rent or the operating current principle for the connected
peripheral devices.
In safety orientated connections the mode (-) in combina-
tion with the closed current principle is generally used.
For operation of optical or acoustic indicators the mode
(+) is selected.
Logic
OR,
AND
OR: The alarms or faults selected in the matrix are always
logically-OR linked, that means presence of an alarm or a
fault leads to the triggering of the relay.
AND: The alarms or faults selected in the matrix are logi-
cally-AND linked, that means the relay is triggered only on
simultaneous triggering of all alarms and faults.
