d = Seat diameter [cm]
D
p = Differential pressure across the valve
[bar]
A = Actuator diaphragm area [cm²]
F = Upper bench range value [bar]
If there are no specifications, calculate as
follows:
Required supply pressure =
Upper bench range value + 1 bar.
Note: The signal pressure at the output (38)
of the positioner can be restricted to approx.
2.4 bar by setting parameter code P9 to
ON.
5.2 Electrical connections
DANGER!
Risk of electric shock and/or
the formation of an explosive
atmosphere!
–
For electrical installation, observe the rel-
evant electrotechnical regulations and
the accident prevention regulations that
apply in the country of use.
–
The following regulations apply to
mounting and installation in hazardous
areas: EN 60079-14: 2008 Explosive
atmospheres – Part 14: Electrical instal-
lations design, selection and erection.
Risk of explosion due to electrostatic
charging
Avoid electrostatic charging of the plastic
housing when mounting and servicing the
positioner in hazardous areas.
NOTICE
–
Adhere to the terminal assignment!
Switching the assignment of the electrical
terminals may cause the explosion pro-
tection to become ineffective!
–
Do not loosen enameled screws in or on
the housing.
–
The maximum permissible values speci-
fied in the national EC type examination
certificates apply when interconnecting
intrinsically safe electrical equipment
(U
i
,I
i
, P
i
, L
i
and C
i
).
EB 8394 EN 29
Connections
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