Samson 3730-1 - Electrical Connections Guide

66 EB 8384-1 EN
Mounting and start-up
For tight-closing valves, the maximum signal
pressure pst
max
is roughly estimated as fol-
lows:
pst
max
= F+
d²·π·∆p
[bar]
4 · A
d = Seatdiameter[cm]
∆p = Differential pressure across the valve
[bar]
A = Actuatorarea[cm²]
F = Upper bench range value of the actuator
[bar]
If there are no specications, calculate as
follows:
Î Requiredsupplypressure=Upperbench
rangevalue+1bar
5.13.4 Signal pressure (output)
The signal pressure at the output (38) of the
positioner can be restricted to approx.
2.4barbysettingP9 parameter code to
ON.
5.14 Electrical connections
For electrical installation, observe the rele-
vant electrotechnical regulations and the ac-
cident prevention regulations that apply in
thecountryofuse.InGermany,theseare
the VDE regulations and the accident pre-
vention regulations of the employers’ liability
insurance.
Risk of fatal injury due to the formation of
an explosive atmosphere.
The following regulations apply to installation
in hazardous areas: EN60079-14
(VDE0165, Part1) Explosive Atmospheres–
Electrical Installations Design, Selection and
Erection.
Incorrect electrical connection will render the
explosion protection unsafe.
− Adhere to the terminal assignment.
− Do not undo the enameled screws in or on
the housing.
− Do not exceed the maximum permissible
values specied in the EC type examina-
tion certicates when interconnecting in-
trinsically safe electrical equipment (U
i
or
U
0
, l
i
or I
0
, P
i
or P
0
, C
i
or C
0
and L
i
or L
0
).
The ambient temperature ranges of the ta-
blesintheECtypeexaminationcerticate
apply for the assignment between the per-
missible ambient temperature, temperature
class, maximum short-circuit currents and
maximum power P
i
and P
0
.
The following applies additionally: For posi-
tionersintypeofprotectionExtb
(Type3730-15)andtypeofprotectionExnA
(Type3730-18),thecableglandsandblank-
ingplugsmustbecertiedaccordingto
EN60079-7(Exe).
DANGER
!
WARNING
!