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Functions
Alarm relay
The alarm relay located in each power supply module has a volt-free contact which
can be accessed on the module's screw connection block.
The operating principle is as follows:
b
Module alarm relay located on the processor rack (rack 0): In normal operation,
with the PLC in RUN, the alarm relay is activated and its contact is closed (state 1).
Whenever the application stops, even partially:
v
occurrence of a blocking fault
v
Incorrect output voltages
v
loss of mains power the relay de-energizes and the associated contact opens
(
state 0).
b
Alarm relay of power supply modules located on the other racks (racks 1 to 7):
when the module is powered up and if the output voltages are correct, the relay is
activated and its contact is closed (state 1). When the mains power is lost or if the
output voltages are incorrect, the relay de-energizes (state 0).
Backup battery
Each power supply module has a slot reserved for a battery which provides the
power supply to the internal RAM memory located in the processors, in order to
ensure that data is saved when the PLC is switched off.
The duration of data back-up is one year. The battery must be changed as soon as
the BAT lamp (red) on the front panel lights up.
RESET pushbutton
Pressing this pushbutton, which is located on the front panel of the power supply
module, triggers a sequence of service signals which is the same as that for:
b
A power switch-off when the pushbutton is pressed
b
A power-up when the pushbutton is released
For the application, these actions represent a warm restart.
Sensor power supply 24 V
c
TSX PSY 2600M/5500M/8500M
a.c. power supply modules have an integrated
power supply which provides a voltage of 24 V
c
to supply the input sensors. The
sensor power supply connection can be accessed via the screw terminal block on
the module.
The power available on this 24 V
c
voltage depends on the model (0.5/0.8/1.6 A),
see characteristics page 2/4.
Functions
Modicon Premium automation
platform
Power supply and fan modules
Description:
page 2/2
References:
pages 2/4 ...
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