T 8384-4 EN
Type 3730-4 Electropneumatic Positioner
with PROFIBUS-PA communication · Series 3730

Anwendung
Positioners for attachment to pneumatic control valves
Valve travel from 3.6 to 300 mm · Opening angle 24 to 100°
Smart, bus-powered field device complying with PROFIBUS-PA specifications based on IEC 61158-2 transmission
technology

The microprocessor-controlled positioner compares the set
point cyclically transmitted over the PROFIBUS-PA network tothe travel or opening angle of the control valve and issues acorresponding output signal pressure.

Fig. 1: Type 3730-4
Direct attachment to Type 3277Pneumatic Actuator

The Type 3730-4 Positioner communicates using PROFIBUS-PA specification according to IEC 61158 and IEC 61784
to exchange data with programmable logic controllers, automation systems and various engineering tools.
Special features• PROFIBUS-PA Profile 3.01 certified positioner fulfilling allcompulsory requirements of PROFIBUS-PA Profile 3.02
• Automatic ID adaptation according to PROFIBUS-PA Profile 3.02 to facilitate replacement of positioners with Profile 2.0 or 3.0 (e.g. Type 3785)• Classified status alarms acc. to NAMUR Recommendation
NE 107• DTM file available to integrate the positioner into FDT/DTM in compliance with specification 1.2• Simple attachment to all common linear and rotary actuators– SAMSON direct attachment (Fig. 1)– NAMUR rib (Fig. 2)– Attachment to rod-type yokes acc. to IEC 60534-6-1– Attachment according to VDI/VDE 3847
– Rotary actuator attachment according to VDI/
VDE 3845 (Fig. 3)• Any desired mounting position of the positioner (but notsuspended)• Single-knob, menu-driven operation• Automatic start-up• LCD easy to read in any mounted position due to selectable reading direction• Integrated EXPERTplus diagnostics for control valves(u T 8389)• Online changing of control parameters• Automatic zero monitoring• Calibrated travel sensor without gears susceptible to wear

Fig. 2: Type 3730-4
Attachment according
to NAMUR

Fig. 3: Type 3730-4
Attachment according to VDI/
VDE 3845

Fig. 4: Type 3730-4
External position sensor with Type 3510 Micro-flow ValveSAMSON AKTIENGESELLSCHAFT · Weismüllerstraße 3 · 60314 Frankfurt am Main, Germany
Phone: +49 69 4009-0 · Fax: +49 69 4009-1507 · samson@samsongroup.com · www.samsongroup.com

Edition April 2021

supply pressure.

• Permanent storage of all parameters (protected againstpower failure)• Negligible influence of temperature and supply air• Adjustable output pressure limitation• Activatable tight-closing function• Binary input for DC voltage signals

The positioner communicates and is powered using
IEC 61158-2 transmission technology conforming toPROFIBUS-PA specifications.
As a standard feature, the positioner comes with a binary input for DC voltage signals to signalize process information
over the PROFIBUS-PA network.

Additional options
Inductive limit contact with proximity switches

Operation

Integrated solenoid valve

A single rotary pushbutton facilitates operation. The parameters are selected by turning the rotary pushbutton, pushing it
activates the required setting. In the menu, all parameters arelisted in one level, meaning there is no need to search in submenus. All parameters can be checked and changed on site.

Binary input for floating contact– External position sensor (Fig. 4)
Stainless steel housing
Principle of operation

All values are displayed on the LCD. The reading direction ofthe LCD can be rotated by 180°.

The positioner is mounted on pneumatic control valves and isused to assign the valve position (controlled variable x) to thecontrol signal (set point w). The positioner compares the electric control signal of a control system to the travel or rotational
angle of the control valve and issues a signal pressure (outputvariable y) for the pneumatic actuator.

The closing direction of the control valve is indicated to thepositioner by setting the DIP switch "Air to open/Air to close".
It assigns the CLOSED position of the control valve to the 0 %reading.
The INIT key activates initialization which is started according
to the ready adjusted parameters. After initialization is completed, the positioner immediately starts closed-loop operation.

The positioner mainly consists of an electric travel sensor system, an analog i/p module with a downstream air capacity
booster and the electronics with the microcontroller.
When a set point deviation occurs, the actuator is either vented or filled with air. If necessary, the signal pressure change
can be slowed down with a volume restriction that can beconnected as necessary. Using the software, the signal pressure to the actuator can be limited to 1.4, 2.4 or 3.7 bar.

Configuration using TROVIS-VIEW
The SAMSON configuration software, TROVIS-VIEW, can beused to configure the positioner. For this purpose, the positioner is equipped with an additional digital interface to beconnected to the RS-232 interface of a PC. TROVIS-VIEW adapts the positioner to any process requirements and allows theprocess to be checked while the process is running. The control valve is connected to the process over the PROFIBUS-PAnetwork.

The fixed flow regulator ensures a constant air flow to the atmosphere, which is used to flush the inside of the positioner
housing and to optimize the air capacity booster. The i/p module is supplied with a constant upstream pressure by thepressure regulator to compensate for any fluctuations in the20

SerialInterface

1613
PROFIBUS-PA
IEC 61158-2mm

S

45%

1915BE2

14BE1w

24V DCPD
1718x

11

23GG

126

98
7Q 10y1x

12345678
9
10
11*
12*
13

Control valve
Travel sensor
PD controller
A/D converter
Microcontroller
i/p converter
Air capacity boosterPressure regulator
Flow regulator
Volume restriction
Inductive limit contact
Solenoid valve
IEC 61158-2
Interface module
14 Binary input 1(voltage input)
15* Binary input 2(for floating contact)
16 Display
17* Actuation of solenoid valve
18 Galvanic isolation
19 D/A converter
20 Serial interface (SSP)*OptionalFig. 5: Functional diagram of Type 3730-4 Positioner

2T 8384-4 ENTable 1: Technical data
Type 3730-4 Positioner with PROFIBUS-PA communication
Technical data in test certificates additionally apply to explosion-protected devices
Valve travel

Adjustable Direct attachment to Type 3277 Actuator

Travel range

3.6 to 30 mm

Attachment according to IEC 60534-6 (NAMUR)

3.6 to 300 mm

Attachment according to VDI/VDE 3847

3.6 to 300 mm

Attachment to rotary actuators (VDI/VDE 3845)

24 to 100° opening angle

Adjustable Adjustable within the initialized travel/angle of rotation of the valve; travel can be restricted to 1/5 atthe maximum.

Bus connection

Fieldbus interface according to IEC 61158-2, bus-powered
Field device according to FISCO (Fieldbus Intrinsically Safe Concept)

Communication
Fieldbus

Data transmission conforming to PROFIBUS-PA specification acc. to IEC 61158 and IEC 61784
Certified DTM file acc. to FDT specification 1.2, suitable for integrating the positioner into frame applications that support the FDT/DTM concept. Other integrations, e.g. into SIMATIC PDM using EDD

Local

SAMSON SSP interface and serial interface adapter

Software requirements

TROVIS-VIEW with database module 3730-4

Permissible voltage supply

9 to 32 V DC · Powered over bus line
The limits in the type examination certificate additionally apply for explosion-protected versions.

Maximum operating current

15 mAAdditional current in case of error

0 mA

Supply air

1.4 to 7 bar (20 to 105 psi)
Air quality acc. to ISO 8573-1: 2001
Max. particle size and density: Class 4 · Oil content: Class 3 · Humidity and water: Class 3
Pressure dew point: at least 10 K below the lowest ambient temperature to be expected

Signal pressure (output)

0 bar up to the capacity of the supply pressure

Characteristic

Linear/equal percentage/reverse equal percentage · User-defined (over operating software and communication) · Butterfly valve linear/equal percentage · Rotary plug valve linear/equal percentage
Segmented ball valve linear/equal percentage
Deviation from characteristic ≤ 1 %Hysteresis≤0.3 %

Sensitivity≤0.1 %

Direction of action

Reversible

Air consumption

Independent of supply air approx. < 110 ln/h

Air output
capacity

to fill actuator with air

At Δp = 6 bar: 8.5 mn³/h

to vent actuator

At Δp = 6 bar: 14.0 mn³/h·

At Δp = 1.4 bar: 3.0 mn³/h· At Δp = 1.4 bar: 4.5 mn³/h·KVmax(20 °C) = 0.09·KVmax(20 °C) = 0.15Permissible ambient temperature–20 to +80 °C for all versions–45 to +80 °C with metal cable glandObserve the limits in the test certificate for explosion-protected versions.

Influences≤0.15 %/10 KTemperature

Supply air None
Effect of vibration≤ 0.25 % up to 2 kHz and 4 g according to IEC 770

EMC

Complying with EN 61000-6-2, EN 61000-6-3, EN 61326-1 and NAMUR Recommendation NE 21

Electrical connections

One M20 x 1.5 cable gland for 6 to 12 mm clamping range · Second M20x1.5 threaded connection
additionally exists · Screw terminals for 0.2 to 2.5 mm² wire cross-sections

Degree of protection

IP 66/NEMA 4X

Use in safety-instrumented systems(SIL)
Emergency venting at 0 V set pointand using optional solenoid valve

Observing the requirements of IEC 61508, the systematic capability of the pilot valve for emergency
venting as a component in safety-instrumented systems is given.

Compliance

T 8384-4 EN

Use is possible on observing the requirements of IEC 61511 and the required hardware fault tolerancein safety-instrumented systems up to SIL 2 (single device/HFT = 0) and SIL 3 (redundant configuration/HFT = 1).
·3

Binary input 1Input

0 to 30 V DC with reverse polarity protection · Static destruction limit 40 V/5.8 mA · Current consumption 3.5 mA at 24 V · Galvanic isolation

SignalSignal ‘1’ at Ue > 5 V · Signal ‘0’ at Ue < 3 V

Materials
Housing

Die-cast aluminum EN AC-AlSi12(Fe) (EN AC-44300) acc. to DIN EN 1706 · Chromated and powder
paint coated · Special version: stainless steel 1.4408

External parts

Stainless steel 1.4404/316LCable gland

M20x1.5, black polyamide

WeightApprox. 1.0 kg

Options for Type 3730-4
Binary input 2 for floating contact
Switching input

R < 100 Ω · Contact load 100 mA · Static destruction limit 20 V/5.8 mA · Galvanic isolation

Solenoid valve · Approval acc. to IEC 61508/SILInput

24 V DC · Reverse polarity protection · Static destruction limit 40 V
Power consumption:

I =U – 5.7 V3840 Ω(corresponding to 4.8 mA at 24 V/114 mW)

SignalSignal ‘0’ no pick-up < 12 V · Signal ‘1’ safe pick-up > 19 V
(emergency venting at 0 V)

Service life

> 5 x 106 switching cycles

Pepperl+Fuchs inductive limit contact

For connection to switching amplifier acc. to EN 60947-5-6

SJ2-SN proximity switch

Measuring plate not detected: ≥3 mA · Measuring plate detected: ≤1 mA

External position sensor
Valve travel

Same as positioner

Cable

10 m · Flexible and durable · With M12x1 connector · Flame-retardant acc. to VDE 0472
Resistant to oils, lubricants and coolants as well as other aggressive media

Permissible ambient temperature–60 to +105 °C with a fixed connection between positioner and position sensor · The limits in thetest certificate additionally apply for explosion-protected versions

Immunity to vibration

Up to 10 g in the range of 10 Hz to 2 kHz

Degree of protection

IP 67

4T 8384-4 ENTable 2: Explosion protection certificates
TypeCertification
1)

CCC Ex-41

CCoEIECEx
TR CMU 1055

FM-451)IECEx

TR CMU 1055

2)

-48

CCC ExIECEx
TR CMU 1055
1)
2)

Number

PTB 04 ATEX 2109

Date

11.05.2017

Number2020322307002425

Date

18.09.2020

Valid until

17.09.2025

NumberA P HQ MH 104 1444

Date21.04.2018

Valid until

20.04.2023

NumberRU C-DE.HA65.B.00510/20

Date

18.03.2020

Valid until

18.03.2025

NumberIECEx PTB 06.0054

Date

17.07.2017

Number

ZETC/35/2021

Date

26.07.2021

Valid until

25.07.2024

Number1675787

Date

24.05.2017

Number3023605Date

15.03.2006

Number

PTB 04 ATEX 2109

Date

11.05.2017

NumberIECEx PTB 06.0054

Date

17.07.2017

Number

ZETC/35/2021

Date

26.07.2021

Valid until

25.07.2024

Number

PTB 05 ATEX 2010 X

Date

22.06.2017

Number2020322307002425

Date

18.09.2020

Valid until

17.09.2025

NumberIECEx PTB 06.0054

Date

17.07.2017

Number

ZETC/35/2021

Date

26.07.2021

Valid until

25.07.2024-433730

CSA

Type of protection/comments
II 2G Ex ia IIC T6 Gb
II 2D Ex ia III T80°C Db

Ex ia IIC T4 ~ T6 Gb

Ex ia IIC T6

1Ex ia IIC T6/T5/T4 Gb X
Ex tb IIIC T80 °C Db X
Ex ia IIC T6…T4 Gb;
Ex ia IIC T80°C Db
II 2G Ex ia IIC T6...T4 Gb
II 2D Ex ia IIIC T80 °C Db
Ex ia IIC T6,Class I, II, Div. 1, Groups A–G
Ex nA II T6, Ex nL IIC T6;
Class I, Div. 2, Groups A–D;
Class II, Div. 1, Groups E–G
Type 4 Enclosure
Class I, Zone 0 AEx ia IIC;Class I, II, III, Div.1, Groups A–G;
Class I, Div.2, Groups A–D;
Class II, Div.2, Groups F, GII 2D Ex tb IIIC T80°C Db

Ex tb IIIC T80°C Db

II 2D Ex tb IIIC T80 °C Db

II 3G Ex nA IIC T6 Gc
II 3D Ex tc IIIC T80°C Dc
Ex ic IIC T4 ~ T6 Gc
Ex nA IIC T4 ~ T6 Gc
Ex nA IIC T6…T4 Gc;
Ex tc IIIC T80°C Dc
II 3G Ex ic nA IIC T6 Gc
II 3D Ex tc IIIC T80 °C Dc IP66

EC type examination certificate
Statement of conformity

T 8384-4 EN5Electrical and bus connection
The Type 3730-4 Positioner with PROFIBUS-PA communication must be connected to bus segments complying withIEC 61158-2 requirements. A shielded two-wire line is used
for both supply power and data
communication.
Mounting the positioner
The Type 3730 Electropneumatic Positioner can be attacheddirectly to the Type 3277 Actuator (175 to 750 cm²) over aconnection block. In actuators with “actuator stem extends”
fail-safe action, the signal pressure is routed over an internal
hole in the actuator yoke to the actuator. In actuators with “actuator stem retracts” fail-safe action, the signal pressure is routed to the actuator over ready-made external piping.

A special version of the positioner allows it to be attached according to VDI/VDE 3847. This type of attachment allows thepositioner to be replaced quickly while the process is runningby blocking the air in the actuator. The positioner can be attached directly to the Type 3277 Actuator using an adapter bracket or adapter block. Alternatively, it can be attached to theNAMUR rib of a control valve using an additional NAMUR
connection block.
A reversing amplifier is necessary for double-acting, springless actuators for the second opposing signal pressure.

Using the appropriate bracket, the positioner can also be attached according to IEC 60534-6-1 (NAMUR recommendation). The positioner can be mounted on either side of the control valve.
A pair of universal brackets is used for the attachment toType 3278 Rotary Actuators or other rotary actuators according to VDI/VDE 3845. The rotary motion of the actuator istransferred to the positioner over a coupling wheel with travelindication.

210

Dimensions in mm

80

M 20x1.5402858Supply (9)

86

164

Output (38)1434

Direct attachment

6T 8384-4 ENPressure gauge bracket
G ¼ or ¼ NPTor connecting plate

NAMUR attachment
70

58
15

Lever

46

34

200

62164

Lever

164

Attachment according
to VDI/VDE 3847

13164

2462

Attachment to SAMSONType 3277

38

Attachment to NAMUR rib

28Schild70

External
position sensor

70

T 8384-4 EN7

Attachment to rotary actuators
VDI/VDE 3845 (Sept. 2010)
Fixing level 1
Size AA1 to AA4

Output Y1
Output Y1

Supply (9)79594980

52

Connecting plate
G ¼ or ¼ NPT

58
Output Y2

80

50

130
150

Light version

Output Y2

Type 3710 Reversing
Amplifier (optional)

90

Mounting unit
CrNiMo steel bracket

164

Output Y1
Output Y1

Supply (9)

80

52

56

Connecting plate
G ¼ or ¼ NPT

86Heavy-duty version

Output Y2 Type 3710

80
130
166

3086
Ø 101

Reversing
Amplifier(optional)

Output Y2

Lever

8Leverxyz

S

17 mm

25 mm

33 mm

M25 mm

50 mm

66 mm

L70 mm

100 mm116 mm

XL

100 mm

200 mm

216 mmzyx

16
10...17T 8384-4 EN

Ordering text–

Type 3730-4... Positioner–

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–

Attachment to Type 3277 Actuator (240 to 700 cm²)
Attachment according to IEC 60534-6-1 (NAMUR)–

Valve travel: ... mm, if applicable, rod diameter: … mm––

Attachment according to VDI/VDE 3847
Valve travel: ... mm, if applicable, rod diameter: … mm–

Attachment to Type 3278 Rotary Actuator (160/320 cm²),mounting unit with CrNiMo steel bracket or heavy-duty attachment–

Attachment to rotary actuators acc. to VDI/VDE 3845,mounting unit with CrNiMo steel bracket or heavy-duty attachment–

Pneumatic reversing amplifier for double-acting actuatorswith connection acc. to ISO 228/1-G ¼ or ¼-18 NPT–

Adapter M20x1.5 to ½ NPT–

Metal cable gland–Special version: housing made of CrNiMo steel

T 8384-4 EN9Article code

Type 3730-4 Positioner xxx0x0xx

1x00x0xx

With LCD and autotune, PROFIBUS-PAExplosion protection
Without0ATEX

II 2G Ex ia IIC T6 Gb; II 2D Ex ia III T80°C Db

1CSA

Ex ia IIC T6; Class I, II, Div.1, Groups A, B, C, D, E, F, G;Ex nA II T6; Ex nL IIC T6; Class I, Div.2, Groups A, B, C, D;
Class II, Div.1, Groups E, F, G

3FM

Class I, Zone 0 AEx ia IIC;Class I, II, III, Div.1, Groups A, B, C, D, E, F, G;
Class I, Div.2, Groups A, B, C, D; Class II, Div.2, Groups F, GATEXII 2D Ex tb IIIC T80°C Db

5ATEX

II 3G Ex nA IIC T6 Gc; II 3D Ex tc IIIC T80°C Dc

8Additional equipment
Inductive limit contact
Without

0

1 x SJ2-SN (NC contact)

10

Solenoid valve
Without0With, 24 V DC

4External position sensor
Without0

With00100

Binary input
Without0

Floating contact01

Diagnostics
EXPERT+ (firmware version K 1.xx)

2EXPERTplus (firmware version K 2.xx)

4

Housing material
Aluminum (standard)0Stainless steel

01Special application
Without

0Version compatible with paint1

Exhaust port with thread ¼-18 NPT00002With additional vent hole and VDI/VDE 3847 adapter,without travel pick-off parts

6

With additional vent hole

7Special version
Without

000IECEx

Ex ia IIC T6…T4 Gb; Ex ia IIC T80°C Db

1012IECEx

Ex tb IIIC T80°C Db

5034IECEx

Ex nA IIC T6…T4 Gc; Ex tc IIIC T80°C Dc

8015EAC

1Ex ia IIC T6/T5/T4 Gb X; Ex tb IIIC T80 °C Db X101410

T 8384-4 EN

T 8384-4 EN11

T 8384-4 EN

2023-04-05 · English

Specifications subject to change without notice