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Please read this instruction manual
carefully before installation and start-up.
Please observe all warnings and
advice, both for your own safety and for
general plant safety. If the device is not
used in accordance with this instruction
manual, then the intended protection
can be impaired.
Please use the device only if its
technical condition is perfect. It should
be used only for its intended purpose.
Please bear in mind safety aspects and
potential dangers and adhere to the
operating instructions at all times.
The preset counter 924-4 detects and measures
pulses, times and frequencies up to max. 60 kHz
and offers a wide variety of different operating
modes. At the same time, the preset counter
processes programmed presets. Use for any
purpose over and beyond this will be deemed as
not in accordance with its intended purpose and
thus not complying with the requirements.
The application area for this device lies in industrial
processes and controls, in the fields of
manufacturing lines for the metal, wood, plastics,
paper, glass, textile and other like industries. Over-
voltages at the terminals of the device must be kept
within the limits of Over-voltage Category II.
The device must only be operated when mounted
in a panel in the correct way and in accordance
with the section "Technical Data".
Correct operation of the device requires the
mandatory use of the appropriate external safety
fuse. Advice concerning the recommended fuse-
protection can be found under "Technical Data".
The device is not suitable for use in hazardous
areas and for areas excluded in EN 61010 Part 1.
If the device is used to monitor machines or
processes in which, in the event of a failure of the
device or an error made by the operator, there
might be the risk of damaging the machine or
causing an accident to the operators, then it is your
responsibility to take the appropriate safety
measures.
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Mount the device away from heat
sources and avoid direct contact
with corrosive liquids, hot steam or
similar.
CAUTION
Mounting instructions
1.
Remove mounting clip from the device.
2.
Insert the device from the front into the panel
cut-out, ensuring the front-panel gasket is
correctly seated.
3.
Slide the fixing clip from the rear onto the
housing, until the spring clamps are under
tension and the upper and lower latching lugs
have snapped into place.
The device must be disconnected
from the power supply, before any
installation or maintenance work is
carried out. AC-powered devices
DANGER
must only be connected to the low-
voltage network via a switch or
circuit breaker.
Installation or maintenance work
must only be carried out by qualified
personnel.
Advice on noise immunity
All connections are protected against external
sources of interference. The installation location
should be chosen so that inductive or capacitive
interference does not affect the device or its
connecting lines! Interference ( e.g. from switch-
mode power supplies, motors, clocked controllers
or contactors) can be reduced by means of
appropriate cable routing and wiring.
Measures to be taken:
Use only shielded cable for signal and control lines.
Connect cable shield at both ends.
The conductor cross-section of the cables should
be a minimum of 0.4 mm².
The shield connection to the equipotential bonding
should be as short as possible and with a contact
area as large as possible (low-impedance).
Only connect the shields to the control panel, if the
latter is also earthed.
Install the device as far away as possible from
noise-containing cables.
Avoid routing signal or control cables parallel to
power lines.
Cables and their insulation should be in accordance
with the intended temperature and voltage ranges.
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