Samson S2000 Instruções de Operação descarregar pdf (Página 53)

6 Operator controls and

readings

Rotary pushbutton

The rotary pushbutton is located underneath

the front protective cover.

The positioner is operated on site using the

rotary pushbutton:

Turn to select codes and values.

Press to confirm setting.

Slide switch AIR TO OPEN or AIR TO CLOSE

AIR TO OPEN applies when the increas

ing signal pressure opens the valve

AIR TO CLOSE applies when the increas

ing signal pressure closes the valve

The signal pressure is the air pressure at the

output of the positioner which is transferred

to the actuator.

For positioners with an attached reversing

amplifier for double-acting rotary actuators

(section 4.6): switch position AIR TO OPEN.

Volume restriction Q

The volume restriction is used to adapt the

air delivery to the actuator size. Two fixed

settings are possible depending on how the

air is routed at the actuator:

For actuators smaller than 240 cm² with

a loading pressure connection at the side

(Type 3271-5), set restriction to MIN

SIDE.

For a connection at the back (Type

3277-5), set restriction to MIN BACK.

For actuators 240 cm² and larger, set to

MAX SIDE for a side connection and to

MAX BACK for a connection at the back.

EB 8384-4 EN 53

Operator controls and readings

AIR TO

OPEN

INIT

CAUTION

VALVE

ACTUATES

MIN SIDE

MAX BACK

MIN BACK

MAX SIDE

SERIAL

INTERFACE

Fig. 23 · Operator controls

Initialization key Cap or rotary switch Metal tag of proximity switch

SSP interface

Switch for

AIR TO OPEN/

AIR TO CLOSE

Volume restriction

Rotary pushbutton

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Samson S2000 Instruções de Operação Página 53

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