6
NDX VALVE CONTROLLER
NOTE
Avoid grounding a welding machine in close
proximity to a valve controller. Damage to
the equipment may result.
CAUTION
Do not exceed the permitted values!
Exceeding the permitted values marked on
the valve controller maycause damage to the
controller and to equipment attached to the
controller and could lead to uncontrolled pres
sure release in the worst case. Damage to the
equipment and personal injury may result.
CAUTION
Do not remove or dismantle a pressurized
controller!
Removing or dismantling pressurized pneu
matic components of a valve controller leads to
uncontrolled pressure release. Always shut off
the supply air and release the pressure from the
pipelines and equipment before removing or
dismantling the controller. Other wise personal
injury and damage to equipment may result.
WARNING
During automatic or manual calibration the
valve operates between open and closed po
sitions. Make sure that the operation does not
endanger people or processes!
WARNING
Do not operate the device with cover removed!
Environmental influence (water, dust etc.)
Ex NOTE
Follow the standards EN/IEC 6007914 when
installing the equipment and EN/IEC 6007925
when connecting Ex i interfaces.
Ex Note
For ordinary locations and Class I Div 2 instal
lations of NDX_ _ _2 have to be supplied by a
Class 2 or Limited Energy Source in accordance
with CSA 61010112/UL 610101.
Ex WARNING
Electrostatic charge hazard!
The cover is nonconductive. Clean with
a damp cloth only! Spark hazard!
Protect the aluminum housing from impacts
and friction!
Ex WARNING
For use in the presence of combustible dust.
· Ignition protection relies on the enclosure.
Protect the cover of the valve controller from
impacts.
· When temperature is higher than 70 °C /
158 °F the temperature rating of the cable
shall be higher than the ambient temperature.
· Device shall not be subjected to a prolific
charge generating mechanism.
· Accumulation of dust shall be avoided!
Intrinsic Safety (Ex i) WARNING
· Ensure that the complete installation and
wiring is intrinsically safe before operating
the device!
· The equipment must be connected via a
certified Zener barrier placed outside the
hazardous area.
· Temperature rating of selected connection
cable shall be greater than 83 °C.
Ex n WARNING
At an ambient temperature ≥ +70 °C / 158 °F,
the temperature rating of selected connection
cable shall be in accordance with the maximum
ambient temperature range. Selected cable
gland shall not invalidate the type of protection.
Ex d WARNING (NDX Ex d version)
Do not open the device when energized!
Explosion protection is lost.
Ex d WARNING (NDX Ex d version)
After de-energizing, delay one minute
before opening!
2
SAFETY PRECAUTIONS