Servomex SERVOTOUGH Oxy, Operator'S Manual

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58
© Servomex Group Limited. 2020 01910001B_8
Relay
Relay coil state in
"active" status
Definition of "active" status
Fault Deenergised
Measurement or
analyser fault detected
Alarm 1 Energised Alarm 1 ac�ve
Alarm 2 Energised Alarm 2 ac�ve
mA Range Indica�on Energised
mA
range has changed over from range 1
to range 2
Service in Progress (SIP) Energised Service in progress status enabled
Maintenance Required Energised
Measurement or
analyser maintenance
required detected
The relay coil status, energised or deenergised, can be set up to meet any par�cular applica�on
requirements.
Note:
Example:
As default, the fault relay coil is deenergised during an "active" status. As defined
above, this is when a measurement or
analyser
fault is detected.
Therefore if the power to
the analyser
fails or the relay cable is disconnected, then this
is transmitted as a fault, as electrically it has the same effect as if the fault relay is
deenergised, this is often termed "fail safe".
In some applications it is preferred that the fault relay is energised in an "active"
status, if this is the case then the relay coil set up can be changed as detailed in
Section 5.17.2.
5.17.2
Setting up the relay coil status
To
define the "ac�ve" status of the relay coil, see Sec�on 5.17.1
1.
Select:
Set Up
Relay Set Up
2.
Edit fault relay coil sate that is required for the "ac�ve" status
Figure
52 -
Fault Relay
3.
Edit Maintenance Required relay coil sate that is required for the "ac�ve" status