Samson 3724 Mounting And Operating Instructions
EB 8395 EN
Translation of original instructions
Type3724 Positioner (cover removed)
Type3724 Electropneumatic Positioner
Firmware version 1.01
Edition October 2018
Note on these mounting and operating instructions
These mounting and operating instructions assist you in mounting and operating the device
safely. The instructions are binding for handling SAMSON devices.
Î For the safe and proper use of these instructions, read them carefully and keep them for
later reference.
Î If you have any questions about these instructions, contact SAMSON‘s After-sales Service
Department (aftersalesservice@samson.de).
The mounting and operating instructions for the devices are included in
the scope of delivery. The latest documentation is available on our website
at www.samson.de > Service & Support > Downloads > Documentation.
Denition 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 EB 8395 EN
!
NOTICE
Property damage message or malfunction
Note
Additional information
Tip
Recommended action
Contents
1 Safety instructions and measures ...................................................................5
1.1 Notes on possible personal injury ...................................................................7
1.2 Notes on possible property damage ................................................................7
2 Markings on the device .................................................................................9
2.1 Nameplate ....................................................................................................9
2.2 Article code ...................................................................................................9
3 Design and principle of operation ................................................................10
3.1 Technical data .............................................................................................12
3.2 Dimensions in mm ........................................................................................14
4 Measures for preparation ............................................................................15
4.1 Unpacking ..................................................................................................15
4.2 Transporting ................................................................................................15
4.3 Storage .......................................................................................................15
5 Mounting and start-up .................................................................................16
5.1 Pneumatic connections..................................................................................16
5.1.1 Supply pressure ...........................................................................................16
5.2 Electrical connections ...................................................................................18
5.2.1 Accessories .................................................................................................18
5.2.2 Selecting cables and wires ............................................................................19
5.2.3 Cable entry .................................................................................................19
6 Operation ...................................................................................................20
6.1 Operating controls .......................................................................................20
7 Operating the positioner ..............................................................................22
7.1 Adapting the display ....................................................................................23
7.2 Enabling conguration to change parameters.................................................23
7.3 Adjusting the volume restriction Q .................................................................24
7.4 Entering the opening direction/direction of action ..........................................25
7.5 Entering the direction of action ......................................................................25
7.6 Limiting the signal pressure ...........................................................................25
7.7 Adjusting the limit contacts ...........................................................................26
7.8 Setting other parameters ...............................................................................26
7.9 Initialization ................................................................................................27
7.10 Zero calibration ...........................................................................................28
7.11 Manual mode ..............................................................................................29
7.12 Reset ...........................................................................................................30
EB 8395 EN 3
Contents
8 Servicing.....................................................................................................31
8.1 Preparation for return shipment .....................................................................31
8.2 Firmware update..........................................................................................31
9 Malfunction .................................................................................................32
9.1 Error codes ..................................................................................................33
9.2 Emergency action ........................................................................................34
10 Decommissioning and removal ....................................................................35
10.1 Decommissioning .........................................................................................35
10.2 Removing the positioner ...............................................................................35
10.3 Disposal ......................................................................................................35
11 Appendix ....................................................................................................36
11.1 After-sales service ........................................................................................36
11.2 Code list ......................................................................................................37
4 EB 8395 EN
Safety instructions and measures
1 Safety instructions and measures
Intended use
The Type3724 Positioner is delivered as a ready-mounted unit on Type3379 Pneumatic
Piston Actuators. It is used to assign the valve position to the control signal. The device is
designed to operate under exactly dened conditions (e.g. operating pressure, temperature).
Therefore, operators must ensure that the positioner is only used in applications where the
operating conditions correspond to the technical data. In case operators intend to use the
positioner in other applications or conditions than specied, contact SAMSON.
SAMSON does not assume any liability for damage resulting from the failure to use the device for its intended purpose or for damage caused by external forces or any other external
factors.
Î Refer to the technical data for limits and elds of application as well as possible uses.
Reasonably foreseeable misuse
The Type3724 Positioner is not suitable for the following applications:
− Use outside the limits dened during sizing and by the technical data
Furthermore, the following activities do not comply with the intended use:
− Use of non-original spare parts
− Performing maintenance activities not specied by SAMSON
Qualications of operating personnel
The positioner must be mounted, started up and serviced by fully trained and qualied
personnel only; the accepted industry codes and practices are to be observed. According to
these mounting and operating instructions, trained personnel refers to individuals who are
able to judge the work they are assigned to and recognize possible hazards due to their
specialized training, their knowledge and experience as well as their knowledge of the
applicable standards.
Personal protective equipment
No personal protective equipment is required for the direct handling of the positioner. Work
on the control valve may be necessary when mounting or removing the device.
Î Observe the requirements for personal protective equipment specied in the valve docu-
mentation.
Î Check with the plant operator for details on further protective equipment.
EB 8395 EN 5
Safety instructions and measures
Revisions and other modications
Revisions, conversions or other modications of the product are not authorized by SAMSON.
They are performed at the user's own risk and may lead to safety hazards, for example. Fur-
thermore, the product may no longer meet the requirements for its intended use.
Safety features
Upon failure of the air supply or electric signal, the positioner vents the actuator, causing the
valve to move to the fail-safe position determined by the actuator.
Warning against residual hazards
The positioner has direct inuence on the control valve. To avoid personal injury or property
damage, plant operators and operating personnel must prevent hazards that could be
caused in the control valve by the process medium, the operating pressure, the signal pres-
sure or by moving parts by taking appropriate precautions. They must observe all hazard
statements, warning and caution notes in these mounting and operating instructions, especially for installation, start-up and service work.
If inadmissible motions or forces are produced in the pneumatic actuator as a result of the
supply pressure level, it must be restricted using a suitable supply pressure reducing station.
Responsibilities of the operator
The operator is responsible for proper operation and compliance with the safety regulations.
Operators are obliged to provide these mounting and operating instructions to the operating
personnel and to instruct them in proper operation. Furthermore, the operator must ensure
that operating personnel or third persons are not exposed to any danger.
Responsibilities of operating personnel
Operating personnel must read and understand these mounting and operating instructions as
well as the specied hazard statements, warning and caution notes. Furthermore, the operating personnel must be familiar with the applicable health, safety and accident prevention
regulations and comply with them.
Referenced standards and regulations
The device with a CE marking fullls the requirements of the Directive 2014/30/EU and the
Directive 2014/35/EU. The Declaration of Conformity is available on request.
Referenced documentation
The following documents apply in addition to these mounting and operating instructions:
− The mounting and operating instructions of the components on which the positioner is
mounted (valve, actuator, valve accessories etc.).
6 EB 8395 EN
Safety instructions and measures
1.1 Notes on possible personal injury
!
WARNING
Risk of personal injury due to moving parts on the valve.
During initialization of the positioner and during operation, the actuator stem moves
through its entire travel range. Injury to hands or ngers is possible if they are inserted
into the valve.
Î During initialization, do not touch any moving valve parts.
1.2 Notes on possible property damage
!
NOTICE
Risk of malfunction due to incorrect sequence during start-up.
The positioner can only work properly if the mounting and start-up are performed in the
prescribed sequence.
Î Perform mounting and start-up as described in section16 in page5.
Unauthorized manual adjustments to the positioner will damage it!
Î Do not move the pick-up rod manually.
Dirty supply air will cause the positioner to malfunction!
Î Only use supply air that is dry and free of oil and dust.
Î Blow through all air pipes and hoses thoroughly before connecting them.
An incorrect electric signal will damage the positioner.
A current source must be used to provide the electrical power for the positioner.
Î Only use a current source and never a voltage source.
EB 8395 EN 7
Safety instructions and measures
Incorrect assignment of the terminals will damage the positioner and will lead to malfunction.
For the positioner to function properly, the prescribed terminal assignment must be observed.
Î Connect the electrical wiring to the positioner according to the prescribed terminal
assignment.
A reference variable above or below the static destruction limit will damage the positioner.
Î Keep the reference variable within the static destruction limit of ±32V.
Malfunction due to initialization not yet completed.
The initialization causes the positioner to be adapted to the mounting situation. After initialization is completed, the positioner is ready to use.
Î Initialize the positioner on the rst start-up.
Î Re-initialize positioner after changing any parameters.
The process is disturbed by the movement of the actuator stem.
Î Do not perform the initialization while the process is running. First isolate the plant by
closing the shut-off valves.
Risk of positioner damage due to incorrect grounding of the electric welding equipment.
Î Do not ground electric welding equipment near to the positioner.
8 EB 8395 EN
Markings on the device
2 Markings on the device
2.1 Nameplate
4
1
3
1 Conguration ID
2 Firmware version
3 Serial number
4 Reference variable
5 Supply
2
5
2.2 Article code
Positioner Type3724- 0 0 0 0 0 0 x 0 0 0 0 0
Housing material
Housing: 1.4409 · Cover: 1.4404 0
Surface nish
Micro-bead blasted 1
Polished (R
Permissible ambient temperature
–20 to +80°C 0
Degree of protection
IP 65
1)
≤0.6µm) 2
a
1)
(only applies in combination with Type3379 Pneumatic Actuator) 0
Pending
EB 8395 EN 9
Design and principle of operation
3 Design and principle of oper-
ation
The Type3724 Positioner is delivered as a
ready-mounted unit on Type3379 Pneumatic
Piston Actuators.
The positioner is used to assign the valve po-
sition (controlled variable x) to the control
signal (reference variable w). The positioner
compares the electric control signal of a control system to the travel of the control valve
(1) and issues a signal pressure (output variabley) for the pneumatic actuator.
The positioner mainly consists of the follow-
ing components (see Fig.1):
− Magnetoresistive sensor (2)
− Analog i/p converter (6) with a down-
stream air capacity booster (7)
− Electronics unit with microcontroller (4)
− Software limit contacts (12)
The travel is measured by an internal pick-up
rod, which is connected to a magnet, as well
as a non-contact magnetoresistive sensor
and the downstream electronics.
The motion of the pick-up rod causes the di-
rection of the magnetic eld to change. This
change is sensed by the sensor (2). The elec-
tronics unit determines the current valve position from this information.
The position of the valve is transmitted to the
microcontroller (4) over its A/D converter
(3). The microcontroller contains a modied
PID controller which compares the actual
valve position with the 4 to 20mA control
signal. The resulting output value is passed
on to the D/A converter. In case of a system
deviation, the activation of the i/p module
(6) is changed so that the actuator (1) is
pressurized or vented accordingly over the
downstream air capacity booster (7). The
supply air is supplied to the booster (7) and
the pressure regulator (8).
!
NOTICE
Unauthorized manual adjustments to the positioner will damage it!
Do not move the pick-up rod manually.
The output signal pressure supplied by the
booster can be limited to 2.3bar by software.
The volume restriction Q (10) is used to optimize the positioner by adapting it to the ac-
tuator.
Tight-closing function
The pneumatic actuator is completely lled
with air or vented as soon as the reference
variable falls below 1% or exceeds 99%
(see set point cutoff in P10 and P11 parameter codes).
10 EB 8395 EN
Design and principle of operation
w
11
12
A1
A2
3
8
1 Control valve
2 Sensor
3 A/D converter
4 Microcontroller
5 D/A converter
6 i/p converter
4
6
7
7 Air capacity booster
8 Pressure regulator
9 Flow regulator
10 Volume restriction
11 Display
12 Limit contacts
5
2
9
10
Q
y
1
x
Fig.1: Circuit diagram
EB 8395 EN 11
Design and principle of operation
3.1 Technical data
Table1: General technical data
Positioner
Attachment Type3379 piston Ø: 63mm · Effective area: 31cm²
Type3379 piston Ø: 90mm · Effective area: 63cm²
Travel 4 to 16mm, adjustable in steps of 0.5mm
Reference variable w
(reverse polarity protection)
Static destruction limit ±32V
Minimum current
Load impedance Max. 6.3V
Supply air
Air quality acc. to
ISO8573-1
Signal pressure (output) 0 bar up to the supply pressure minus 0.4bar
Characteristic Three selectable characteristics:
Transit time Only for actuators with initialization time > 0.4s
Direction of action w/x reversible
Perm. ambient temperature –20 to +80°C
Electromagnetic
compatibility
Degree of protection IP 65
Compliance
Materials
Housing 1.4409
Cover 1.4404
Dome (visual indicator) Polycarbonate
Weight (without actuator) Approx. 1.2kg
1)
For faster actuators, a volume restriction must be used. Otherwise, the initialization cannot be
performed successfully.
2)
Pending
4 to 20mA signal range · Two-wire device
Split-range operation 4 to 11.9mA and 12.1 to 20mA
3.8mA
Supply air: 1.4 to 7bar (20 to 105psi)
Max. particle size and density: Class 4 · Oil content: Class 3 · Pressure
dew point: Class 3 or at least 10K below the lowest ambient
temperature to be expected
Can be limited to approx. 2.3bar by software
Linear · Equal percentage · Reverse equal percentage
1)
Complying with EN 61000-6-2, EN 61000-6-3 and NAMUR
Recommendation NE21
2)
(only applies in combination with Type3379 Pneumatic
Actuator)
12 EB 8395 EN
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