T 8484-1 EN
TROVIS 3730-1 Electropneumatic Positioner

Application
Single-acting positioner for attachment to pneumatic globe and rotary valves. Self-calibrating, automatic adaptation
to valve and actuator.
Set point
Valve travel
Opening angle

4 to 20 mA
3.5 to 300 mm
24 to 100°

The positioner ensures a predetermined assignment of thevalve position to the input signal. It compares the input signal
received from a control system to the travel or rotational angleof the control valve and issues a corresponding output signal
pressure (output variable).
Special features• Simple attachment to all common linear and rotary actuators:–––––SAMSON direct attachment
NAMUR rib
Attachment to rod-type yokes according toIEC 60534-6-1
Attachment according to VDI/VDE 3847
Rotary actuator attachment according toVDI/VDE 3845

• Non-contact position sensing• LCD easy to read in any mounting position thanks to selectable reading direction• Simple one-knob, menu-driven operation• Configurable with a computer over the SSP interface using
the TROVIS-VIEW software• Variable, automatic start-up• All parameters saved in non-volatile EEPROM• Two-wire system with a small electrical load of 315 Ω• Tight-closing function can be activated• Continuous zero monitoring

Fig. 1: TROVIS 3730-1 Electropneumatic Positioner

SAMSON 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 July 2023

Design and principle of operation

In case of a set point deviation, the activation of the i/p module (7) is changed so that the actuator of the control valve (1)is pressurized or vented accordingly over the downstream
booster (6). As a result, the closure member of the valve (e.g.
plug) is moved to the position determined by the set point.

The TROVIS 3730-1 Electropneumatic Positioner is mounted
on pneumatic control valves and used to assign the valve position (controlled variable x) to the control signal (set point w).
The positioner compares the electric control signal of a control
system to the travel or opening angle of the control valve andissues a signal pressure for the pneumatic actuator.

The positioner is operated by a rotary pushbutton (9) for
menu navigation on the display (11).

The positioner mainly consists of a non-contact travel sensor
system (2), pneumatics and the electronics with the microcontroller (4). The valve position is transmitted either as an angleof rotation or linear travel to the pick-up lever, from there to
the travel sensor (2) and forwarded to the microcontroller (4).
The PID algorithm in the microcontroller compares the valve
position measured by the travel sensor (2) to the 4 to 20 mA
DC control signal issued by the control system after it hasbeen converted by the A/D converter (3).

10%911Smm%mm

Serial Interface#E 1243µCw

E 12138I

75Exhaust

146Supply 9I

214Output 38y1x

1 Control valve
2 Travel sensor
3 A/D converter
4 Microcontroller
5 Pressure reducer
6 Air booster
7 i/p converter
8 D/A converter
9 Communication interface
10 Rotary pushbutton
11 Display

M
M.1
M.2
M.3

Available options
Software limit switch (PLC/NAMUR)
Position transmitter
Inductive limit switches (NAMUR)

Fig. 2: Block diagram

2T 8484-1 ENTechnical data · TROVIS 3730-1 Positioner
TravelAdjustable travel for

Direct attachment to Type 3277:
Attachment according to IEC 60534-6 (NAMUR):
Attachment according to VDI/VDE 3847
Attachment to rotary actuators:

Travel range

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

3.5 to 30 mm
3.5 to 300 mm
3.5 to 300 mm
24 to 100°Set point w
Signal range

4 to 20 mA · Two-wire device, reverse polarity protection
Split-range operation: 4 to 11.9 mA and 12.1 to 20 mA

Static destruction limit±33 V

Minimum current

3.6 mA for display · 3.8 mA for operation

Load impedanceWithout explosion protection: ≤6.6 V (corresponds to 330 Ω at 20 mA) · Explosion-protected versions:≤7.3 V (corresponds to 365 Ω at 20 mA)

SupplySupply air

1.4 to 7 bar (20 to 105 psi)

Air quality acc. to ISO 8573-1

Max. particle size and density:
Oil content:
Pressure dew point:

Signal pressure (output)

0 bar up to the supply pressure · Can be limited to 2.4 bar ±0.2 bar by software

Hysteresis≤0.3 %Sensitivity≤0.1 %

Characteristic

Linear/equal percentage/reverse equal percentage/SAMSON butterfly valve/VETEC rotary plug
valve/segmented ball valve

Direction of action

Reversible

Air consumption, steady state

Independent of supply air, approx. 65 ln/hClass 4Class 3
Class 3 or at least 10 K below the lowest ambient temperature
to be expected

Air output capacity (when ∆p = 6 bar)
Actuator (supply)

8.5 mn³/h · At Δp = 1.4 bar: 3.0 mn³/h · KVmax(20 °C) = 0.09

Actuator (exhaust)

14.0 mn³/h · At Δp = 1.4 bar: 4.5 mn³/h · KVmax(20 °C) = 0.15

Environmental conditions and permissible temperatures
Permissible environmental conditions according to EN 60721-3
Storage

1K6 (relative humidity ≤95 %)Transport

2K4

Operation

4K4–20 to +85 °C:–40 to +85 °C:–55 to +85 °C:

All versions
With metal cable glands
Low-temperature versions with metal cable glands

Observe the limits in the test certificate for explosion-protected versions.
Resistance to vibration
Vibrations (sinusoidal)

According to DIN EN 60068-2-6:
0.15 mm, 10 to 60 Hz; 20 m/s², 60 to 500 Hz per axis
0.75 mm, 10 to 60 Hz; 100 m/s², 60 to 500 Hz per axis

Bumps (half sine)

According to DIN EN 60068-2-29:
150 m/s², 6 ms; 4000 bumps per axis

NoiseAccording to DIN EN 60068-2-64:
10 to 200 Hz: 1 (m/s²)²/Hz; 200 to 500 Hz: 0.3 (m/s²)²/Hz; 4 h/axis

Recommended continuous duty

≤20 m/s²

Influences
Temperature≤0.15 %/10 K

Supply air

None

Requirements
EMC

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

Degree of protection

IP 66/NEMA 4X

T 8484-1 EN3

Electrical connections
Cable glands

One M20x1.5 cable gland for 6 to 12 mm clamping range
Second M20x1.5 threaded connection additionally availableTerminals

Screw terminals for 0.2 to 2.5 mm² wire cross-section

Explosion protection
ATEX, IECEx, ...

Refer to Table 1

Materials
Housing and coverDie-cast aluminum EN AC-AlSi12(Fe) (EN AC-44300) acc. to DIN EN 1706, chromate and powder
coating · Special version: stainless steel 1.4408

WindowMakrolon® 2807

Cable glands

Polyamide, nickel-plated brass, stainless steel 1.4305

Other external parts

Stainless steel: 1.4571 and 1.4301

WeightAluminum housing: approx. 1.0 kg · Stainless steel housing: approx. 2.2 kg

Optional additional functions
Position transmitter
VersionTwo-wire system, galvanic isolation, reverse polarity protection, reversible direction of action

Supply10 to 30 V DC

Output signal

4 to 20 mA

Operating range

2.4 to 21.6 mA

Error indication

2.4 or 21.6 mA

No-load current

1.4 mA

Static destruction limit

38 V DC · 30 V AC

Software limit switches
VersionSignal state
Static destruction limit

NAMUR

PLC

Galvanic isolation, reverse polarity protection,
switching output acc. to EN 60947-5-6

Galvanic isolation, reverse polarity protection,
binary input of a PLC acc. to EN 61131-2,
Pmax = 400 mW≤1.0 mA (non-conducting)R = 10 kΩ (non-conducting)≥2.2 mA (conducting)R = 348 Ω (conducting)

32 V DC/24 V AC

16 V DC/50 mA

Inductive limit switches
VersionFor connection to switching amplifier according to EN 60947-5-6, SJ2-SN proximity switches, reversepolarity protection

Measuring plate not detected≥3 mA

Measuring plate detected≤1 mA

Static destruction limit

20 V DC

Permissible ambient temperature–50 to +85 °C

Table 1: Summary of explosion protection approvals
PTB 18 ATEX 2001

Date

2018-10-25

II 2 G Ex ia IIC T4/T6 Gb
II 2 D Ex ia IIIC T 85 °C Db-510

EU type examination certificate

NumberPTB 18 ATEX 2001

II 2 D Ex tb IIIC T 85 °C Db

Date

2018-10-25-810

EU type examination certificate

NumberPTB 18 ATEX 2001

Date

2018-10-25

II 3 G Ex nA IIC T4/T6 Gc
II 2 D Ex tb IIIC T 85 °C Db

EU type examination certificate

NumberPTB 18 ATEX 2001

II 3 G Ex nA IIC T4/T6 Gc

Date

2018-10-25-111-110

EU type examination certificate

IECEx

-511

TROVIS 3730-1

4Type of protection
Number-850

Certification

IECEx

NumberIECEx PTB 19.0010

Date2019-03-04

Ex ia IIC T4/T6 Gb
Ex ia IIIC T85°C Db

NumberIECEx PTB 19.0010

Ex tb IIIC T85°C Db

Date

2019-03-04

T 8484-1 EN

-811

IECEx

CCoE

CCC ExCCC ExIECEx PTB 19.0010

Date2019-03-04

Ex nA IIC T4/T6 Gc
Ex tb IIIC T85°C Db

NumberIECEx PTB 19.0010

Ex nA IIC T4/T6 Gc

Date

2019-03-04

Number

A/P/HQ/
MH/104/6597

Date

2020-11-16

Valid until

2024-12-31
2020322307001506

Date

2023-04-29

Valid until

2025-09-17

Number2020322307001506

Date

2023-04-29

Valid until

2025-09-17

NumberRU C-DE.
HA65.B.00700/20

Date

2020-08-19

Valid until

2025-08-18-130

Number

FM21CA0063

FMDate2022-10-18

-130

EAC

Type of protection
NumberNumberFM

Number

FM21US0096

Date

2022-10-18

Number

21-KA4BO-0728

Date

2021-09-30

Valid until

2022-09-30-114

TROVIS 3730-1-113-512-112-111

IECEx

-851

CertificationKCS Korea

TR CMU-118

TR CMU

UKEX-518

TR CMU

UKEX

-858

-816

TR CMU

-856

-516

-116

TR CMUUKEX

T 8484-1 EN

Number

ZETC/111/2021

Date

2021-08-25

Valid until

2024-08-24

Number

ZETC/35/2021

Date

2021-07-26

Valid until

2024-07-25

Number

ZETC/35/2021

Date

2021-07-26

Valid until

2024-07-25

Number

ZETC/35/2021

Date

2021-07-26

Valid until

2024-07-25

Number

ZETC/35/2021

Date

2021-07-26

Valid until

2024-07-25

Number

FM21UKEX0202X

Date

2022-10-18

Number

FM21UKEX0202X

Date2022-10-18

Number

FM21UKEX0203X

Date2023-01-24

Ex ia IIC T4T6 Gb

Ex ia IIC T4/T6 Gb
Ex ia IIIC T85 °C Db

Ex tb IIIC T85 °C Db
1Ex ia IIC T6...T4 Gb X
Ex ia IIIC T85 °C Db X

IS Cl. I, II, III, Div. 1, Gr. A–G;
T* Ta*; IS Ex ia IIC T* Gb
NI Class I, II, III Div. 2, Gr. A–G; T* Ta*; Type 4X; IP66
IS Cl. I, II, III, Div. 1, Gr. A–G; T* Ta* Type 4X
NI Cl. I, II, III, Div. 2, Gr. A–G; T* Ta*Type 4X;
Cl. I, Zone 1, AEx ia IIC; Type 4X
Ex ia IIC T6/T4

Module D
II 2G Ex ia IIC T4/T6 Gb
II 2D Ex ia IIIC T85 °C Db
Module B
II 2D Ex tb IIIC T85 °C Db
Module B
II 3G Ex nA IIC T4/T6 Gc
II 2D Ex tb IIIC T85 °C Db
Module B
II 3G Ex nA IIC T4/T6 Gc
Module B
II 2 G Ex ia IIC T4/T6 Gb
II 2 D Ex ia IIIC T 85 °C Db
II 2 D Ex tb IIIC T85 °C Db
II 3 G Ex ec IIC T4/T6 Gc

5

Mounting the positioner
The positioner can be attached directly to the Type 3277
Actuator over a connection 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, thesignal pressure is routed to the actuator over ready-madeexternal piping.
Using the appropriate bracket, the positioner can also beattached according to IEC 60534-6-1 (NAMUR
recommendation). The positioner can be mounted on eitherside 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 theactuator is transferred to the positioner over a coupling wheelwith travel indication.
A special version of the positioner allows it to be attachedaccording to VDI/VDE 3847. This type of attachment allows
the positioner to be replaced quickly while the process isrunning by blocking the air in the actuator. The positioner canbe attached directly to the Type 3277 Actuator using anadapter bracket or adapter block. Alternatively, it can beattached to the NAMUR rib of a control valve using anadditional NAMUR connection block.
Communication
The positioner can be configured with SAMSON's TROVISVIEW Software (version 4). For this purpose, the positioner
has a digital interface (SSP) to allow the USB port of acomputer to be connected to it using an adapter cable.

6The TROVIS-VIEW software enables the user to easily configure the positioner as well as view process parameters online.
Note
TROVIS-VIEW can be downloaded free of charge from ourwebsite at www.samson.de > Service & Support > Downloads> TROVIS-VIEW.
Additional options–

Analog position transmitter–

Software limit switches (NAMUR)–

Software limit switches (PLC)–

Inductive limit switches

Operation
The positioner is operated with a user-friendly rotary pushbutton. The parameters are selected by turning the knob, pushingit activates the required setting. The menu is structured with allparameters listed one after the other on the same level. This
allows users to read and change parameters at the device.
All values are displayed on the LCD. The reading direction ofthe LCD can be rotated by 180°.
To configure the positioner with SAMSON’s TROVIS-VIEW
software, the positioner is equipped with an additional digitalinterface to be connected to the RS-232 or USB interface of acomputer.

T 8484-1 EN

Dimensions in mm

Attachment according to IEC 60534-6
Connecting plate

Pressure gauge bracket

15704634348589212

Direct attachment

1458288540

164

T 8484-1 EN7

136224

164

200

Attachment according to VDI/VDE 3847-1
onto Type 3277 Actuator

1646238

Attachment according to VDI/
VDE 3847-1 to a NAMUR rib

1648T 8484-1 ENAttachment according to VDI/VDE 3847-2 withsingle-acting actuator
2026813156 (167 1))

164

Attachment according to VDI/VDE 3847-2
with double-acting actuator260

156 (167 1))

6813

164

T 8484-1 EN9

Attachment to rotary actuators according to VDI/VDE 3845

Heavy-duty version

5680

5286

Reversing amplifier 1)

80
3086
Ø101

130
166

Light version

4959

79

76

5080

Reversing amplifier 1)

501301501)
Reversing amplifier— Type 3710 (see drawing of heavy-duty version fordimensions)— 1079-1118/1079-1119, no longer available(see drawing of light version for dimensions)

10T 8484-1 EN

Lever1610...17zyx

Leverxyz

M

25 mm

50 mm

66 mm
116 mm

L70 mm

100 mm

XL

100 mm

200 mm

216 mm

XXL

200 mm

300 mm

316 mmFixing levels according to VDI/VDE 3845 (September 2010)
Mmin
Fixing level 2 (bracket surface)

25M6C

Fixing level 1 (actuator surface)
Actuator

Dimensions in mm

ØdBØD
A1)

T 8484-1 ENSizeABCØd

MminD1)

AA050

25155.5 for M56650AA18030

205.5 for M59650

AA2803030

5.5 for M59650

AA31303030

5.5 for M514650

AA41303050

5.5 for M514650

AA52005080

6.5 for M622050

Flange type F05 acc. to DIN EN ISO 5211

11Electrical connection

G–12+11Connecting the mA control signal

II–42+41–52+51

Inductive limit switch 1

Inductive limit switch 2

Terminal assignment of inductive limit switches

EE–46/–92 Software limit switch 1+45/+91 (PLC/NAMUR)–56/–94 Software limit switch 2+55/+93 (PLC/NAMUR)
Terminal assignment of software limit switches–32+31Terminal assignment of position transmitter

12T 8484-1 ENArticle code
Positioner

TROVIS 3730-1- x x x 0 x x 0 x x x x x 1 0 x 9 9 9 8With LCD and autotune
Explosion protection
Without

0 0 0

ATEX

II 2 G Ex ia IIC T4/T6 Gb; II 2 D Ex ia IIIC T 85 °C Db

1 1 0

ATEX

II 2 D Ex tb IIIC T 85 °C Db

5 1 0

ATEX

II 3 G Ex nA IIC T4/T6 Gc; II 2 D Ex tb IIIC T 85 °C Db

8 1 0

ATEX

II 3 G Ex nA IIC T4/T6 Gc

8 5 0IECEx

Ex ia IIC T4/T6 Gb; Ex ia IIIC T85°C Db

1 1 1

IECEx

Ex tb IIIC T85°C Db

5 1 1

IECEx

Ex nA IIC T4/T6 Gc; Ex tb IIIC T85°C Db

8 1 1

IECEx

Ex nA IIC T4/T6 Gc

8 5 1

CCC ExEx ia IIC T4/T6 Gb; Ex ia IIIC T85 °C Db

1 1 2

CCC Ex

Ex tb IIIC T85 °C Db

5 1 2

CCoE

Ex ia IIC T4T6 Gb

1 1 1

EAC

1Ex ia IIC T6...T4 Gb X; Ex ia IIIC T85 °C Db X

1 1 3FMIS Cl. I, II, III, Div. 1, Gr. A–G; T* Ta*; IS Ex ia IIC T* Gb;
NI Cl. I, II, III Div. 2, Gr. A–G; T* Ta*; Type 4X; IP66

1 3 0FMIS Cl. I, II, III, Div. 1, Gr. A–G; T* Ta* Type 4X
NI Cl. I, II, III, Div. 2, Gr. A–G; T* Ta*Type 4X;
Cl. I, Zone 1, AEx ia IIC; Type 4X

1 3 0

KCS Korea

Ex ia IIC T6/T4

1 1 4

TR CMU 1055

II 2G Ex ia IIC T4/T6 Gb; II 2D Ex ia IIIC T85 °C Db

1 1 6

TR CMU 1055

II 2D Ex tb IIIC T85 °C Db

5 1 6

TR CMU 1055

II 3G Ex nA IIC T4/T6 Gc; II 2D Ex tb IIIC T85 °C Db

8 1 6TR CMU 1055

II 3G Ex nA IIC T4/T6 Gc

8 5 6UKEX

II 2 G Ex ia IIC T4/T6 Gb; II 2 D Ex ia IIIC T 85 °C Db

1 1 8UKEX

II 2 D Ex tb IIIC T85 °C Db

5 1 8UKEX

II 3 G Ex ec IIC T4/T6 Gc

8 5 8Option 1Without

0

Position transmitter 4 to 20 mA

1

Option 2Without0

2x software limit switches (PLC)0 0 0

12x software limit switches (NAMUR) 1)

x x x

22x inductive limit switches (NAMUR)

4

Electrical connection
2x M20x1.5 (1x cable gland, 1x blanking plug)1

Housing material
Aluminum EN AC-44300DF (standard)0

Stainless steel 1.4408

1CoverWith round window

1Without window

2

GehäuseausführungStandard

0 0With additional vent hole and VDI/VDE 3847 adapter; without travel pick-off parts

2 0With additional vent hole

2 1

Additional certification
SIL

1

Permissible ambient temperature

T 8484-1 EN

13

Positioner

TROVIS 3730-1- x x x 0 x x 0 x x x x x 1 0 x 9 9 9 8Standard: –20 to +85 °C0–40 to +85 °C metal cable gland

1–55 to +85 °C, low-temperature version with metal cable gland

2Hardware version
1.00.00

9 9

Firmware version
3.00.04
Only for versions with explosion protection

Specifications subject to change without notice

T 8484-1 EN

2024-03-26 · English1)

9 8