Operating Level - PMA TB 40 Mode D'emploi

OPERATING LEVEL

The process value is indicated in the upper display line, the limit value is indicated in
the lower display line. Before initial adjustment, e.g. before commissioning, set the
parameters and configure the instrument, if necessary (
configuration level).
Behaviour of the instrument
Task of the instrument is the interruption of the energy supply when reaching the limit
value. Relay 1 switches the energy supply. De-energization is followed by locking. As
long as the process value is below the limit value, relay 1 remains energized and the
green LED is on. When the process value reaches or exceeds the limit value, relay 1 is
de-energized and the energy supply is locked. Locking remains effective, also when
the process value re-decreases below the limit value. Reset is only possible, when the
sensor temperature has decreased below the limit value by the amount of the
hysteresis (for reset
Indicator LEDs
Terature below the limit value (within limits). The red LED is on with relay 1
de-energized (limit value reached). The green LED extinguishes. When the proces
value re-decreases below the limit value, the green LED will be lit additionally with the
energy supply interrupted. The yellow LED provides limit value signalling.
Alert alarm (relay 3 and yellow LED)
The alert alarm is adjustable relatively to the limit value in parameter
+
switches relay 3. Relay 3 is energized with the process value below the threshold
LCL
(limit value - parameter
threshold, relay 3 is de-energized. This alert alarm is signalled via the yellow LED.
The alert alarm must be used only for signalling and not for control purposes!
Reset
When the temperature re-decreases below the limit value (hysteresis 1 digit), the
green LED lights up again and the red LED remains on. Resetting is only possible in
this condition, either via the front panel keys (by pressing
via an external contact
Loc
parameter (
Loc
Reset
0
Reset only via the front panel keys (factory setting).
1
Reset only by closing the external contact
2
Reset only via the front panel keys and no process value display
*
3
Reset only by closing the external contact
display .
"
r
section Reset).
LCL
). When the process value reaches or exceeds the
Ü
across terminals 9 and 10. Selection is by means of
r
parameter level).
r
parameter level,
M
Ü
across terminals 9 and 10.
Ü
across terminals 9 and 10 and no process value
LCL
and
I
and simultaneously)
*
.
or