Signal Pressure (Output); Electrical Connections - Samson 3730-5 Mounting And Operating Instructions

Actuator stem retracts FE (AIR TO CLOSE)
Fail-safe position "Valve Open"
(for globe and angle valves):
For tight-closing valves, the maximum signal
pressure pst is roughly estimated as fol-
max
lows:
d 2 × × p D
pst = F +
max
4 × A
d = Seat diameter [cm]
Dp = Differential pressure across the valve
[bar]
A = Actuator diaphragm area [cm²]
If there are no specifications, calculate as
follows:
Required supply pressure =
Upper bench range value + 1 bar.

5.1.3 Signal pressure (output)

The signal pressure at the output (Out-
put 38) of the positioner can be limited to
1.4, 2.4 or 3.7 bar in Code 16.
The limitation is not activated [OFF] by de-
fault.
p
[bar]
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.
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
or U ; I or I ; P
o i o i
L ).
o
Connections
or P ; C or C , and L
o i o
EB 8384-5 EN
i
or
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