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Safety
3.3.2
Measures to protect against interference
}
If necessary, use bulkhead separators to protect the unit from sources of interference.
}
Inductive loads within the environment (e.g. contactor, relay and solenoid valve coils)
should be wired using suppression elements (e.g. RC elements). This is particularly im-
portant if these inductive loads are fed from the same supply.
}
The power cables and the data cables should be physically separated from each other
in their own conduits (recommended minimum distance: 10 cm/3.94"). This will avoid in-
ductive and capacitive interference.
}
The prescribed earth point
noise immunity requirements.
Connect the functional earth to the central earth point in star form. A cable cross sec-
tion of at least 1.5 mm² should be used for the connection. Connections should be kept
as short as possible.
3.3.3
Supply voltage
}
The supply voltage must be +24 V DC
3.3.4
Operation
}
Plan the system correctly to ensure that a communication error between the PMI and
the host computer does not cause a malfunction.
}
Do not operate the touchscreen interface using hard or heavy objects or apply excess-
ive pressure.
}
The maximum ambient temperature must not be exceeded when using the unit.
}
Do not pour liquids over the unit or insert any objects into the unit.
}
When in storage and during operation, protect the unit from vibration and shock.
}
Avoid using chemicals close to the system.
3.3.5
Maintenance
}
Do not use thinners or organic solvents to clean the unit and touchscreen surface.
Further information on care and maintenance of the touchscreen can be found in the
chapter "Care and Maintenance".
Operating Manual PMI 5
1002241-EN-07
for the functional earth guarantees compliance with
CAUTION!
Safe electrical isolation must be ensured for the external power supply gen-
erating the 24 V voltage supply. Failure to do so could result in electric
shock. Power supplies must conform to DIN VDE 0551/EN 60742 and
EN 50178.
NOTICE
The touchscreen surface is not abrasion resistant; if it is dirty, please clean
with care and do not apply heavy pressure.
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