Samson Positioner Type 3730 1 Electropneumatic Positioner T83841 4n3h5a

Series 3730 Electropneumatic Positioner Type 3730-1

Application Single-acting or double-acting positioner for attachment to pneumatic control valves. Self-calibrating, automatic adapta­ tion to valve and actuator. Reference variable 4 to 20 mA Travels 3.75 to 200 mm Opening angle 24° to 100°

The positioner ensures a predetermined assignment of the valve stem position (controlled variable x) to the input signal (refer­ ence variable w). It compares the input signal received from a controller to the travel or rotational angle of the control valve and issues a corresponding output signal pressure (output vari­ able y). Special features • Easy attachment to common linear and rotary actuators with SAMSON direct attachment interface (Fig. 1), over NAMUR rib (Fig. 2), to control valves with rod-type yokes according to IEC 60534-6-1, or to rotary actuators according to VDI/VDE 3845 (Fig. 3) • Any desired mounting position of the positioner • Simple one-knob, menu-driven operation • LCD easy to read in any mounted position due to selectable reading direction • Variable, automatic start-up • Preset parameters - only values deviating from the standard need to be adjusted • Calibrated travel sensor without gears susceptible to wear • Permanent storage of all parameters in EEPROM (protected against power failure) • Two-wire system with a small electrical load of 300 W • Activatable tight-closing function • Continuous monitoring of zero point • Two standard programmable position alarms • Certified according to IEC 61508/SIL

Fig. 1 · Type 3730, direct attachment to Type 3277 Pneumatic Actuator

Fig. 2 · Type 3730, attachment to NAMUR rib

Version – Type 3730-1 · Electropneumatic positioner operable on site with LCD Additional options – Inductive limit switch with proximity switches – Stainless steel housing Fig. 3 · Type 3730, attachment acc. to VDI/VDE 3845

Associated Information Sheet

T 8350 EN

Edition September 2010

Data Sheet

T 8384-1 EN

Principle of operation The positioner is attached to pneumatic control valves and is used to assign the valve stem position (controlled variable x) to the electric input signal supplied by a control system (reference variable w). It compares this signal to the travel or rotational an­ gle of the control valve and produces the corresponding output signal pressure (output variable y) for the pneumatic actuator. The positioner mainly consists of an electric travel sensor system (2), an analog i/p module with a downstream booster as well as the electronics unit with a microcontroller (5). When a deviation occurs, the actuator is pressurized or vented. If required, the changes in the signal pressure can be slowed down by a volume restriction. A constant air stream with a fixed set point to the atmosphere is created by flow regulator (9) with a fixed set point. The air stream is used to purge the inside of the case as well as to opti­ mize the air capacity booster. The i/p module (6) is supplied with a constant upstream pressure by the pressure reducing valve (8) to make it independent of the supply air pressure.

Operation The positioner is operated with a -friendly rotary pushbutton system. The parameters are selected by turning the knob, pushing it activates the required setting. In the menu, all parameters are listed in one level, eliminating the need to search in submenus. All parameters can be checked and changed on site. All values are displayed on the LCD. The reading direction of the LCD can be rotated by 180° at the push of a button.

16

S mm

% mm

% A1 14

w

A2

4

5 w

PD x

3 2

6

9

8 y 7

Q 10

1 x

Legend 1 2 3 4 5 6 7 8 9 10 14 16

Control valve Travel sensor Controller A/D converter Microcontroller i/p module Pneumatic booster Pressure reducing valve Flow regulator Volume restriction Software limit switches LCD

Fig. 4 · Functional diagram of Type 3730-1 Positioner

2

T 8384-1 EN

Table 1 · Technical data Type 3730-1 Positioner Travel

Direct attachment to Type 3277 Actuator: Attachment according to IEC 60534-6-1:

3.75 to 30 mm 3.75 to 200 mm

Opening angle

Attachment according to VDI/VDE 3845

24 to 100°

Travel range

Reference variable w

Adjustable within initialized travel/angle of rotation; restricted to 1/5 at the maximum Signal range

4 to 20 mA · Two-wire device, reverse polarity protection

Split-range

4 to 11.9 and 12.1 to 20 mA

Static destruction limit

100 mA

Minimum current

3.7 mA

Load impedance

� 6 V (corresponds to 300 W at 20 mA) Supply pressure

Supply air Signal pressure (output) Characteristic

1.4 to 7 bar (20 to 105 psi)

Air quality acc. to Maximum particle size and density: Class 4 · Oil content: Class 3 ISO 8573-1 (2001) Pressure dew point: Class 3 or at least 10 K below the lowest ambient temperature to be expected 0 bar up to the capacity of the supply pressure · Limitable to approx. 2.4 bar per software optionally

1 characteristic for linear travel · 8 characteristics for angle of rotation �1 %

Hysteresis Sensitivity

� 0.1 %

Direction of action

w/x reversible

Air consumption, steady state Air output capacity

Actuator vented

Permissible ambient temperature

Influences

Independent of supply air approx. 110 ln/h

Actuator pressurized At Dp = 6 bar: 8.5 mn3/h · At Dp = 1.4 bar: 3.0 mn3/h · KVmax (20 °C) = 0.09 At Dp = 6 bar: 14.0 mn3/h · At Dp = 1.4 bar: 4.5 mn3/h · KVmax (20 °C) = 0.15 –20 to +80 °C · –45 to +80 °C with metal cable gland

The limits in EC Type Examination Certificate additionally apply for explosion-protected devices.

Temperature

� 0.15 %

Supply air

None

Vibrations

� 0.25 % up to 2000 Hz and 4 g acc. to IEC 770

Electromagnetic compatibility

Complies with EN 61000-6-2, 61000-6-3 and NAMUR Recommendation NE 21 requirements

Electrical connections

One M20 x 1.5 cable gland for 6 to 12 mm clamping range · Second M20 x 1.5 threaded connection additionally exists · Screw terminals for 2.0 to 2.5 mm² wire cross-sections

Explosion protection

See summary of explosion protection certificates

Degree of protection

IP 66 / NEMA 4X

Implementation in safety-related systems in compliance with IEC 61508

Suitable for use in safety-relevant applications up to SIL 2 (single device) and SIL 3 (with redundant configuration), safety shutdown at a reference variable of 0 mA.

Binary s

2 software limit switches with adjustable limit values in steps of 0.5 %, reverse polarity protection

Signal status

Version

Without explosion protection

Explosion-protected version

No response

Conductive (R = 348 W)

� 2.1 mA

Response

Non-conducting

� 1.2 mA

For connection to the binary input of a PLC acc. to EN 61131 Pmax = 400 mW

Only for connection to NAMUR switching amplifier acc. to EN 60947-5-6

Operating voltage

Materials Housing

Die-cast aluminum EN AC-AlSi12(Fe) (EN AC-44300) acc. to DIN EN 1706 · Chromated and powder paint coated · Special version in stainless steel 1.4581

External parts

Stainless steel 1.4571 and 1.4301

Cable gland

Polyamide, black, M20 x 1.5

Weight

Approx. 1.0 kg

Option Inductive limit switch Proximity switch SJ 2SN

3

For connection to switching amplifier according to EN 60947-5-6

T 8384-1 EN

Dimensions in mm

210

Direct attachment

34

80

M 20x1.5

28

58 Output (38)

Supply (9)

86

164

14

40

Attachment acc. to IEC 60534-6 and NAMUR Pressure gauge bracket G ¼ or ¼ NPT

or connecting plate Lever S = 17 mm M = 50 mm L = 100 mm XL = 200 mm

70

58 15 46

34

Attachment to rotary actuators Output A1 Supply (9)

50

Z

76

A1

A2

79 59 49

Connecting plate G ¼ or ¼ NPT 50

58

Reversing amplifier Output A2

80 130 150

Connecting plate

164

4

15

T 8384-1 EN

Summary of explosion protection certificates Type of approval

Certificate number

Date

Comments

EC Type Examination Certificate First Addendum Second Addendum

PTB 04 ATEX 2033

2004-04-19 2005-01-25 2008-02-25

Statement of Conformity First Addendum

PTB 04 ATEX 2114 X

2004-12-09 2008-02-26

II 3 G EEx nA II T6 II 3 G EEx nL IIC T6; Zone 2 II 3 D IP 54/65 T 80 °C; Zone 22; Type 3730-18

IECEx approval

IECEx PTB 06.0055

2006-11-02

Ex ia IIC T6; Type 3730-11

FM approval

3023478

2004-12-01

Cl. I, II, III; Div. 1; Gr. A, B, C, D, E, F, G Cl. I, Zone 0, AEx ia IIC T6 Cl. I; Div. 2; Gr. A, B, C, D NEMA Type 4X; Type 3730-13

II 2 G EEx ia IIC T6 II 2 D IP 65 T 80 °C; Type 3730-11

2008-11-03

CSA approval

1675820

2005-08-29 2009-07-14

Ex ia IIC T6; Cl. I, Zone 0 Cl. II, Gr. E, F, G Ex nA II T6; Cl. II, Div. 2, Gr. E, F, G Type 4 Enclosure; Type 3730-13

NEPSI approval

GYJ091010

2009-01-20

Ex ia IIC T4 - T6; Type 3730-11

GYJ091011X

Ex nL IIC T4 - T6 Ex nA II T4 - T6; Type 3730-18

Article code Positioner

Type 3730­ 1

x

x

0

0

0

0

0

0

0

x

0

0

x

0

0

0

0

0

0

With LC display and autotune, 4 … 20 mA reference variable, two software limit switches* Explosion protection Without II 2 G EEx ia IIC T6 and

0 II 2 D IP 65 T 80 °C acc. to ATEX

Ex ia / Ex n acc. to FM/CSA II 3 G EEx nA/nL II T6 and

1 3

II 3 D IP 54/65 T 80 °C acc. to ATEX

8

Option: Inductive limit switch Without

0

With proximity switch SJ 2SN

1

Housing material Standard aluminum

0

Stainless steel 1.4581

1

Special applications None

0

Device compatible with paint (lowest permissible ambient temperature –20 °C)

1

Exhaust air connection with ¼-18 NPT thread, back of housing sealed

2

Special version None

* Additional functions such as limit switches, solenoid valve, position transmitter or external position sensor, e.g. with Type 3730-2 Positioner

5

T 8384-1 EN

Attachment of the positioner The Type 3730-1 Electropneumatic Positioner can be attached directly to the Type 3277 Actuator over a connection block. In actuators with fail-safe action “Actuator stem extends” and Type 3277-5 Actuator (120 cm²), the signal pressure is routed over an internal bore in the actuator yoke to the actuator. In actuators with fail-safe action “Actuator stem retracts” and in actuators with effective diaphragm areas of 240 cm² or larger, the signal pressure is routed to the actuator over ready-made external piping. Using the appropriate bracket, the positioner can also be attached according to IEC 60534-6-1 (NAMUR recommendation). The positioner can be mounted on any side of the control valve. A pair of universal brackets is used to mount the Type 3730-1 Positioner to a Type 3278 Rotary Actuator or other rotary actuators according to VDI/VDE 3845. The rotary motion of the actuator is transferred to the positioner over a coupling wheel with degree scale.

Ordering text Positioner Type 3730-1x – Without pneumatic connecting rail (only when directly attached to Type 3277) – With pneumatic connecting rail ISO 228/1-G ¼ – With pneumatic connecting rail ¼-18 NPT – Without/with pressure gauge up to max. 6 bar – Additional cover label with list of parameters and operating instructions in English/Spanish or English/French (standard version German/English) – Attachment to Type 3277 Actuator (120 to 700 cm²) – Attachment to IEC 60534-6-1 (NAMUR) Travel: ... mm, if applicable, stem diameter: ... mm – Attachment to Type 3278 Rotary Actuator (160/320 cm²) – Attachment to rotary actuators acc. to VDI/VDE 3845 – Pneumatic reversing amplifier for double-acting actuators with connection according to ISO 228/1 - G ¼ or ¼-18 NPT – Adapter M20 x 1.5 to ½ NPT – Metal cable gland – Positioner free of substances that can impair surfaces to be painted – Exhaust air connection with ¼ NPT thread – Special version: housing made of CrNiMo steel

SAMSON AG · MESS- UND REGELTECHNIK Weismüllerstraße 3 · 60314 Frankfurt am Main · Phone: +49 69 4009-0 · Fax: +49 69 4009-1507 Internet: http://www.samson.de

T 8384-1 EN

2010-09

Specifications subject to change without notice.