Positioner for quarterturn-actuatorswith external solenoid valve

Sicher und ß exibel –die neue Antriebsgeneration actubar

A Module of the Valve-Control System bar-vacotrol

-positurn®

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Objective

bar-positurn is a module of the Valve-Control System bar-

vacotrol. It can be mounted on all actuators with NAMUR

interface acc. VDI/VDE 3845. bar-positurn is a cost-effec -

tive and robust electro-pneumatic positioner especially

for pneumatic quarterturn-actuators. This comes against

a background that increasing numbers of „Quarterturn

Valves“ are being used for regulating tasks.

Uses

! The bar-positurn is a compact positioner for quarter turn

valves

! bar-positurn offers an optimum cost-effectiveness,

by focussing on functions which are relevant

for this valve-type

! The special operational safety, among others, is gua-

ranteed by the digital opto-electronic angle measuring

system

! Operation is easy and is limited to the points:

- Initialization

- Adapting to the rotational direction of the actuator

- Choice of signal type (4 - 20 mA or 0 - 10 V)

! Binary electrical signals for both end positions and an

analogue signal for position feedback are standard

! All safety functions are available by the valve variations

D, S and E (see page 4)

! The positioning speed of the actuator can be adapted

to the process demands by throttles in the control valve

! bar-positurn can also be used as position encoder or

as self-initialising end position indication for

ON/OFF-valves

! Low energy cost, as there is no constant loss of air

Range of Application

The bar-positurn Þ nds application in the following:

- Butterß y valves for inß ow and outß ow in Þ lters for

water treatment plants

- Exhaust gas butterß y valves in furnaces

- Air valves on ventilators

- Dosing tasks

- Regulating tasks in process technology

Function

bar-positurn is a 3-point-positioner in 4-wire technology.

Power supply with 24V DC is required. It is applicable to

actuators with NAMUR interface using brackets or directly

on actuators of type actubar. The position regulation takes

place – each acc. to safety demands – via special control

valves, which are connected with the NAMUR interface.

The pivoting angle is measured by a digital opto-electronic

position sensor.

The theoretical value is to be speciÞ ed as an analogue

signal.

The processor compares theo. and act. values and drives

the solenoid valve. In the current-free middle position the

actuator is blocked pneumatically. The position of the

valve is determined via the position indicator. The bar-

positurn-cover offers 4 LED’s pointing outwards, displaying

the following modes:

- Ready

- Modus for Initialization

- Right end position reached

- Left end position reached

3

Abb. 1

Optical angle-measuring-system

Abb. 2

bar-positurn PN-D-S-0-3 direct on

actubar

Abb. 3

bar-positurn PN-S-S-0-3 direct on

actubar

Electr. Connections/

Terminal Diagram

Technical Data

Terminal-No. Signals

Digital inputs for

1 Rotate anti-clockwise Use only at

2 Rotate clockwise

Initialization

OPEN/CLOSE function

3

4 Activation of positioner

5 External signal voltage

for digital outputs

Digital outputs for

6 Left end position reached

7 Right end position reached

8 Ready

Analogue input

10 Theo. value of pivoting angle

Analogue output

11 Act. value of pivoting angle

Power supply

13 24V DC

14 GND

Ports of solenoid valve

15 Coil 1

16 GND

17 Coil 2

18 GND

Material

Housing Al- die-cast, epoxy-coated

Screws Stainless steel A2

Viewing glass PC

Rotating angle up to 180°

Protection class IP 65

Ambient temperature - 20 ° up to + 70° C

Weight ~ 1,35 kg

Analogue

actuating signal selectable 4 - 20 mA,

0 - 10 V, polarised

Load impedance at 0 - 10V > 1 kΩ,

at 20 mA < 500 Ω

Dead zone + 2% of nominal swing angle

Position indication selectable 4 - 20 mA,

0 - 10 V, polarised

Resolution < 0,5 % of nominal swing angle

End position message optocoupler, short-circuit-proof,

12

before end position

- 28 V DC, signal approx. 3%

Supply voltage 24VDC (21 - 28 V) polarised

Power input Variation D: 4,2 W

Variation S: 10,2 W

Variation E: 7,2 W

Cable ø 7 - 13 mm

Binary input signal < 10 V for "0"; > 18 V for "1"

at ON/OFF-valves

Operating pressure 2,5 - 10 bar

bar GmbH

Auf der Hohl 1

53547 Dattenberg/Germany

Tel. +49 (0) 2644 - 96070

Fax +49 (0) 2644 - 960735

www.bar-gmbh.de

sales@bar-gmbh.com

Measurements

M20 x1,5

12 x 4 wide

ca. 102 ca. 96

ø 65

154x94 wide

80x30

130x 30

154

M16 x1,5

42

20,5

30,5

50,5

3,1

64

Valve variations

Order Drive type Safety function key

D double- valve stays in last positionacting in case of power failure

S double-acting

valve shuts or opens

in case of power failure

E single-

acting

valve shuts or opensin case of power failure and/orpressure failure

(if required, ask for circuit diagram)

Example of use:

Type-code bar-positurn

PN x x x xHole pattern in control-box

0 = none (assembly via mounting bracket)

3 = actubar-direct-mounting (possible from size AD/S-011

upwards)

E = single-acting (fail to close/open in case of

pneumatic or power failure)

S = double-acting (fail to close/open in case

of power failure)

Valve-version

S = valve-version for actuator sizes AD/S-004 up to

AD/S-076 resp. for air volume up to ~ 5l per double-stroke

flow rate: 400 l/min

Valve-function

D = double-acting (fail to stay)

M = valve-version for actuator sizes AD/S-110 up to

AD/S-750 resp. for air volume from ~ 5l per double-stroke

flow rate: 1,250 l/min

Mounting brackets

0 = none

1 = mounting bracket 80x30x30mm

2 = mounting bracket 130x30x30mm

3 = mounting bracket 80x30x20mm

4 = mounting bracket 130x30x50mm

Model PN = positurn

PN D S 1 0

no hole pattern (assembly

via mounting bracket)

double-acting (fail to stay)

valve-version with low flowrate

(small actuators)

mounting bracket 80x30x30mm

PN S M 0 3

actubar-direct-mounting (possible

from size AD/S-011 upwards)

double-acting (fail to close/open)

valve-version with medium flowrate

(medium sized actuators)

no mounting bracket

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