Samson S2000 Instrucciones de operaciones descargar pdf (Pagina 36)

4.7 Attaching an external

position sensor

Refer to Table 7 on page 46 for the mount

ing parts and accessories required.

In the positioner version with an external po

sition sensor, the sensor placed in a sepa

rate housing is attached over a plate or

bracket to the control valve. The travel

pick-off corresponds to that of a standard

device.

The positioner unit can be mounted as re

quired to a wall or a pipe.

For the pneumatic connection either a con

necting plate (6) or a pressure gauge

bracket (7) must be fixed to the housing, de

pending on the accessory chosen. Make

sure the seal rings (6.1) are correctly in

serted (see Fig. 6, bottom right).

For the electrical connection a 10 meter

connecting lead with M12x1 connectors is

included in the scope of delivery.

Note:

–

In addition, the instructions in sections

5.1 and 5.2 apply for the pneumatic and

electrical connection.

Operation and setting are described in

sections 7 and 8.

–

Since 2009, the back of the position sen

sor (20) is fitted with two pins acting as

mechanical stops for the lever (1). If this

position sensor is mounted using old

mounting parts, two corresponding

Ø8 mm holes must be drilled into the

mounting plate/bracket (21). A template

is available for this purpose. Refer to Ta

ble 7 on page 46.

4.7.1 Mounting the position

sensor with direct

attachment

Type 3277-5 Actuator with 120 cm²

The signal pressure from the positioner is

routed over the signal pressure connection

of the connecting plate (9, Fig. 17 left) to the

actuator diaphragm chamber. To proceed,

first screw the connecting plate (9) included

in the accessories onto the actuator yoke.

Turn the connecting plate (9) so that the

correct symbol for the fail-safe position

"Actuator stem extends" or "Actuator

stem retracts" is aligned with the marking

(Fig. 17, below).

Make sure that the gasket for the con

necting plate (9) is correctly inserted.

The connecting plate has boreholes with

NPT and G threads.

Seal the threaded connection that is not

used with the rubber seal and square

plug.

Type 3277 Actuator with 175 to 750 cm²:

The signal pressure is routed to the connec

tion at the side of the actuator yoke for the

36 EB 8384-4 EN

Attachment to the control valve – Mounting parts and accessories

Fig. 16 · Positioner unit with sensor mounted on a

micro-flow valve

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Samson S2000 Instrucciones de operaciones Pagina 36

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