TEMON 4-C
Doc. N°
MO-0368-ING
Microener. - Copyright 2010
2.1
Date
01.12.2008
Rev.
0
Pag.
12
of
14
10. Modality Of Tripping And Restore
10.1 -
Alarm
At the overcoming of 1°C of the value of threshold set on the input, after 5 seconds, on the channel where the
threshold value has been exceeded, the ALARM relay is energized and the ALARM led is on. The restore from
the alarm condition with relay de-energized and the relative led off, happen when the temperature go down of 2°C
respect at the threshold value set.
10.2 - Trip
At the overcoming of 1°C of the value of threshold set on the input, after 5 seconds, on the channel where the
threshold value has been exceeded, the TRIP relay is energized and the TRIP led is on. The restore from the
alarm condition with relay de-energized and the relative led off, happen when the temperature descend of 2°C
respect at the threshold value set.
10.3 - To silence alarm
If the Hold function is disabled it’s possible to silence the alarm condition that there is on the measure input.
When there is an alarm condition the ALARM relay and the “ALARM” optical signalling are enabled. Pressing the
Reset button the relay is de-energized while the optical signalling of the alarm condition become flash. If the
temperature increase up to reach the TRIP temperature minus 1°C, the relay and the optical signalling are
enabled another time. If after the reset, the temperature go down under the threshold value set, the flashing
optical signalling will be automatically deleted.
11. Diagnostic
The device is provided of the thermic probes diagnostic function.
The condition controlled on the measure input are:
Probe Pt100 interrupted: signalling on the display of the message O P E (open).
Probe in short circuit: signalling on the display of the message S H r (short circuit).
Probe out of order for temperature reading wrong: signalling on the display of the message FDC.
When the device switch on the auto-diagnostic FAULT relay commute and it remain in the status of energized until
one of the conditions above described appears, for a failure of the device or if the power supply is absent.
The anomaly condition is signalled also by the FAULT led on.
Every time that a probe of a channel is out of order because it
’s interrupted (OPE) or in short circuit (SHR) or the
delta of temperature is too much elevated (FDC), the led of the corresponding channel flash until stopping of the
anomaly. The alarm of interrupted probe (SHR) or open probe (OPE) will be reset automatically while the alarm for
the delta of temperature (FDC) disappears only pressing the ENTER key, and to keep it pressed, to press the
+
key at least 5 seconds.
The status of the contact of the relay (all available with exchange contact) is showed in the following table:
RELAY
DISABLE STATUS
ENABLE STATUS
UNPOWERED STATUS
ALARM
ALARM OFF: CLOSED 29-30
ALARM ON: CLOSED 29-31
CLOSED 29-30
TRIP
TRIP OFF: CLOSED 32-33
TRIP ON: CLOSED 32-34
CLOSED 32-33
FAN
FAN OFF: CLOSED 35-36
FAN ON: CLOSED 35-37
CLOSED 35-36
FAULT
FAULT OFF: CLOSED 38-40
FAULT ON: CLOSED 38-39
CLOSED 38-39
