SH 8484-1 EN
Translation of original instructions

TROVIS 3730-1 Electropneumatic Positioner

Edition August 2022

Definition of signal words! DANGER
Hazardous situations which, if not avoided,
will result in death or serious injury! WARNING
Hazardous situations which, if not avoided,
could result in death or serious injury

2! NOTICE
Property damage message or malfunction
Note
Additional information
Tip
Recommended action

SH 8484-1 ENPurpose of this manual
The Safety Manual SH 8484-1 contains information relevant for the use of the TROVIS 3730-1
Positioner in safety-instrumented systems according to IEC 61508 and IEC 61511. The safety
manual is intended for planners, constructors and operators of safety-instrumented systems.
! NOTICE

Risk of malfunction due to incorrect mounting, connection or start-up of the device.
Î Refer to Mounting and Operating Instructions u EB 8484-1 for details on how to mountthe device, perform the electric and pneumatic connections as well as start up.
Î Observe the warnings and safety instructions written in the Mounting and Operating Instructions u EB 8484-1.
Further documentation
The documents listed below contain descriptions of the start-up, functioning and operation ofthe positioner. You can download these documents from the SAMSON website.
TROVIS 3730-1 Positioner
u T 8484-1:Data sheet
u EB 8484-1: Mounting and operating instructions
u KA 8484-1: Quick guide
NoteIn addition to the positioner documentation, observe the technical documentation for thepneumatic actuator, control valve and other valve accessories.

SH 8484-1 EN3

Contents

1
1.1
1.2
1.3
1.4

Scope............................................................................................................5General.........................................................................................................5
Use in safety-instrumented systems...................................................................5Versions and ordering data.............................................................................5Attachment.....................................................................................................62

Technical data (excerpt from EB 8484-1).........................................................633.1
3.2

Safety-related functions..................................................................................8
Fail-safe action...............................................................................................8
Protection against unauthorized changes to the configuration.............................844.1

Mounting, connection and start-up................................................................10Electrical connection......................................................................................1055.1
5.2
5.3
5.4

Required conditions......................................................................................11Selection......................................................................................................11Mechanical and pneumatic installation...........................................................11
Electrical installation......................................................................................12Operation....................................................................................................1266.1
6.2

Proof testing.................................................................................................13
Visual inspection to avoid systematic failure....................................................13
Function testing.............................................................................................14

7

Maintenance and repair...............................................................................158Safety-related data and certificates...............................................................164SH 8484-1 ENScope

1 Scope
1.1 GeneralThe TROVIS 3730-1 Electropneumatic Positioner is a single-acting, venting positioner for attachment to pneumatic rotary and linear actuators with spring-return mechanism. The positioner is used to position control valves.

1.2 Use in safety-instrumented systems
NoteFor use in safety-instrumented systems, control valves must only be used in combination witha pneumatic actuator which does not have a pneumatic or electric lock-up device, travel stopor handwheel.
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.
Use of the positioner is possible on observing the requirements of IEC 61511 and the required hardware fault tolerance in safety-instrumented systems up to SIL 2 (single device/HFT = 0) and SIL 3 (redundant configuration/HFT = 1).
The positioner and its safety-instrumented function are regarded as type A according toIEC 61508-2.
NoteThe architecture and the interval between proof tests must be changed accordingly for ahigher safety integrity level.

SH 8484-1 EN5

Technical data (excerpt from EB 8484-1)

1.3 Versions and ordering data
The positioners with the following article code are suitable for use in safety-instrumentedsystems:− TROVIS 3730-1-xxx0xx0xxxxx1xxxxxx
The positioner can be fitted with options. The inductive limit switches enhance the safetyinstrumented functions of the positioner.
The article code written on the nameplate provides details on the optional equipment of thepositioner:
Positioner

TROVIS 3730-1- x x x 0 x x 0 x x x x x 1 x x x x x xOption 22x inductive limit switches (NAMUR),–50 to +85 °C

4Additional certification
SIL

1

1.4 Attachment
The positioner is suitable for the following types of attachment in combination with various
mounting parts:− Direct attachment to SAMSON Type 3277 Linear Actuators− Attachment to linear actuators according to IEC 60534-6 (NAMUR)− Attachment to linear actuators according to VDI/VDE 3847-1 and VDI/VDE 3847-2− Attachment to rotary actuators according to VDI/VDE 3845

2 Technical data (excerpt from EB 8484-1)
TROVIS 3730-1 Positioner
Technical data in test certificates additionally apply to explosion-protected devices
Set point w
Signal range

6

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

SH 8484-1 EN

Technical data (excerpt from EB 8484-1)

Static destruction limit±33 V

Minimum current

3.6 mA for display · 3.8 mA for operation

Load impedance

No explosion protection: ≤6.6 V (corresponding to 330 Ω at 20 mA)
Explosion protection: ≤7.3 V (corresponding to 365 Ω at 20 mA)

SupplySupply air

1.4 to 7 bar (20 to 105 psi)

Air quality acc. toISO 8573-1

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

Hysteresis≤0.3 %

Sensitivity≤0.1 %

Air consumption, steadystate

Independent of supply air, approx. 65 ln/hClass 4Class 3
Class 3 or at least 10 K below thelowest ambient temperature to beexpected

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

2K4Operation

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

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

Observe the limits in the test certificate for explosion-protected versions.

Safety-relevant options
Inductive limit switches
VersionFor connection to switching amplifier according to EN 60947-5-6,
SJ2-SN proximity switches, reverse polarity protection

Measuring plate not detected≥3 mA

Measuring plate detected≤1 mA

Static destruction limit

20 V DCSH 8484-1 EN7

Safety-related functions

Permissible ambient temperatures of SIL functions
Function

Temperature range

Emergency venting 0.0 mA–60 to +80 °CSafety-related end position monitoring by the inductive limit switches–50 to +80 °C

3 Safety-related functions
The TROVIS 3730-1 Positioner is fitted with the two safety-instrumented functions. They become effective independently from the microcontroller and software.
Emergency venting by an mA signal
Î See Fig. 1, path
Fail-safe action is triggered when no signal (0 mA) is applied to terminals 11/12. The air
capacity booster (6) vents to the atmosphere over Output 38. The valve moves to the fail-safe
position depending on the spring-return mechanism of the actuator.
Safety-related end position monitoring by the "inductive limit switches" option
Î See Fig. 1, path
The inductive limit switches SJ2-SN (NAMUR NC contact) indicate the adjusted safety-related
end position at terminals 41/42 or 51/52. See u EB 8484-1 for adjusting the limit switches.

3.1 Fail-safe action
Fail-safe action is triggered by the i/p converter and upon supply air failure. The positioner
fully discharges its pneumatic output to the atmosphere, causing the pneumatic actuator to bevented. As a result, the valve moves to the fail-safe position. The fail-safe position depends
on how the springs are arranged in the pneumatic actuator (air-to-close or air-to-open).
When the air supply fails, all positioner functions, except for open/closed-loop control, remain active.
Note

The pneumatic output of the positioner can also be vented to the atmosphere over the software, e.g. by entering a corresponding set point. This procedure is not a safety-instrumented
function.

8SH 8484-1 ENSafety-related functions

3.2 Protection against unauthorized changes to the configuration
A change to the configuration cannot affect the safety-instrumented function nor cause it tobe deactivated.

SH 8484-1 EN9

Safety-related functions

91011S%

Serial Interfacemm%

mm

#µCw

–12+11E 1243E 12138–42+427I

145ExhaustI26

14–52+51

Supply 9Output 38y1x1
2
3456
7Control valve
Travel sensor
A/D converter
Microcontroller
Pressure reducer
Air capacity booster
i/p converter

8D/A converter
9Communication interface
10 Rotary pushbutton
11 Display
12 1) Software limit switch (PLC/NAMUR)
13 1) Position transmitter
14 1) Inductive limit switches (NAMUR)
1)

OptionalFig. 1: Functional diagram of the positioner

10SH 8484-1 EN

Mounting, connection and start-up

4 Mounting, connection and start-up
Refer to Mounting and Operating Instructions u EB 8484-1 for details on how to mount,perform the electric and pneumatic connections as well as start up the positioner.
Only use the specified original mounting parts and accessories.

4.1 Electrical connection
Î Connect the electrical power (mA signal) as shown in Fig. 2.

G–12+11Fig. 2: Connection of the electrical powerÎ Connect options as shown in Fig. 3.

SH 8484-1 EN11

Required conditions

Inductive limit switches:II–42+41–52+51

Inductive limit switch 1

Inductive limit switch 2

Fig. 3: Electrical connection of the optional additional function

5 Required conditions! WARNING
Risk of malfunction due to incorrect selection or wrong installation and operating conditions.
Î Only use control valves in safety-instrumented systems if the necessary conditions in theplant are fulfilled. The same applies to the mounted positioner.

5.1 Selection
Î The required transit times of the control valve are observed.
The transit times to be implemented are determined by the process engineering requirements.
Î The positioner is suitable for the prevailing ambient temperature (see Table ‘Permissible
ambient temperatures of SIL functions’ on page 8.
Î The temperature limits are observed.

12SH 8484-1 EN

Required conditions

5.2 Mechanical and pneumatic installation
Î The positioner is mounted properly as described in the mounting and operating instructions and connected to the air supply.
TipThe corresponding error messages indicate incorrect attachment (u EB 8484-1,'Malfunctions' section).
Î The actuator used is single acting with a spring-return mechanism.
Î The actuator used does not have a pneumatic or electric lock-up device, travel stop or
handwheel.
Î The maximum supply pressure does not exceed 7 bar.
Î The actuator’s bench range must be designed to ensure that a sufficient tight-closing force
exists even with 0.2 bar pressure at the pneumatic outputs. The maximum pressure at theoutput must be taken into account on observing the safety-instrumented function of downstream pneumatic devices.
Î The pneumatic air supply meets the instrument air specifications.
Particle size and quantity

Oil content

Pressure dew point

Class 4Class 3Class 3≤5 µm and 1000/m³≤1 mg/m³–20 °C or at least 10 K below the lowest
ambient temperature to be expectedTip
We recommend installing a supply pressure regulator/filter upstream of the device. For
example, the SAMSON Type 4708 Supply Pressure Regulator with 5 µm filter cartridge
can be used.
Î The positioner is mounted as prescribed.
Î The vent opening at the back of the positioner remains open when the positioner is installed on site.
The maximum pressure at the output may increase due to the higher backpressure while
venting to a connected chamber.

SH 8484-1 EN13

Proof testing

5.3 Electrical installation
Î The positioner is connected to the electric power supply properly as described in themounting and operating instructions.
Î Only cables whose outside diameters are suitable for the cable glands are used.
Î The electrical cables in Ex i circuits comply with the data that planning was based on.
Î The cable glands and cover screws are fastened tightly to ensure that the degree of protection is met.
Î The installation requirements for the applicable explosion protection measures are observed.
Î The special conditions specified in the explosion protection certificates are observed.

5.4 Operation
Î The positioner is put into operation and initialized (a positioner that has not yet been
initialized is in the fail-safe position) according to the mounting and operating
instructions.
Î The inductive limit switches are adjusted mechanically to meet the specifications.

6 Proof testing
The proof test interval and the extent of testing lie within the operator's responsibility. Theoperator must draw up a test plan, in which the proof tests and the interval between them
are specified. We recommend summarizing the requirements of the proof test in a checklist.
! WARNING
Risk of dangerous failure due to malfunction in the event of emergency (actuator is notvented or the valve does not move to the fail-safe position).
Î Only use devices in safety-instrumented systems that have passed the proof test according
to the test plan drawn up by the operator.

14SH 8484-1 EN

Proof testing

Regularly check the safety-instrumented function of the entire SIS loop. The test intervals are
determined, for example on calculating each single SIS loop in a plant (PFDavg).

6.1 Visual inspection to avoid systematic failure
To avoid systematic failure, inspect the positioner regularly. The frequency and the scope of
the inspection lie within the operator's responsibility. Take application-specific influences into
account, such as:− Dirt blocking the pneumatic connections− Corrosion (destruction primarily of metals due to chemical and physical processes)

SH 8484-1 EN15

Proof testing− Material fatigue− Aging (damage caused to organic materials, e.g. plastics or elastomers, by exposure tolight and heat)− Chemical attack (organic materials, e.g. plastics or elastomer, which swell, leach out or
decompose due to exposure to chemicals)! NOTICE
Risk of malfunction due to the use of unauthorized parts.
Î Only use original parts to replace worn parts.

6.2 Function testing
Regularly check the safety-instrumented function according to the test plan drawn up by theoperator.
NoteRecord any faults in the positioner and inform SAMSON of them in writing.
Emergency venting by the mA signal connected to terminals 11/12 (control signal):
1. Supply the initialized positioner with air within the permissible supply pressure range(max. 7 bar) which allows the valve to move to the maximum travel/angle of rotation.
2. Connect an electric input signal ≥3.8 mA to the positioner (terminals 11/12).
3. Switch the positioner to automatic or manual mode (if it has not already been done).
4. Set the input signal (terminals 11/12) over a local current source or over the control system in such a way that the valve moves to 50 % of its travel/angle of rotation.
5. Disconnect the electric input signal (terminals 11/12).
This must cause the valve to move to its fail-safe position.
6. Check whether the actuator is fully vented within the demanded time.
Safety-related end position monitoring
1. Supply the initialized positioner with air within the permissible supply pressure range(max. 7 bar) which allows the valve to move to the maximum travel/angle of rotation.
2. Connect an electric input signal ≥3.8 mA to the positioner (terminals 11/12).
3. Switch the positioner to automatic or manual mode (if it has not already been done).

16

SH 8484-1 EN

Maintenance and repair

4. Set the input signal (terminals 11/12) over a local current source or over the control system in such a way that the valve moves to 50 % of its travel/angle of rotation.
5. Set the input signal (terminals 11/12) over a local current source or over the control system in such a way that the valve moves to the end position.
6. Check whether a signal is issued at terminals 41/42 or 51/52 (depending on the upperor lower end position) when the valve has reached the end position.

7 Maintenance and repair
Only perform the work on the positioner described in u EB 8484-1.
! NOTICE
Safety-instrumented function will be impaired if repair work is performed incorrectly.
Î Only allow trained staff to perform service and repair work.

8 Safety-related data and certificates
The safety-related data are listed in the following certificate.

SH 8484-1 EN17

﻿

18

SH 8484-1 ENSH 8484-1 EN19

20

SH 8484-1 ENSH 8484-1 EN21

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

2022-09-16 · English

SH 8484-1 EN