AUMA SA 25.1 User manual

Control
Parallel
Profibus DP
Profinet
→Modbus RTU
Modbus TCP/IP
Foundation Fieldbus
HART
Multi-turn actuators
SA 25.1 –SA 48.1
SAR 25.1 –SAR 30.1
Control unit: electronic (MWG)
with actuator controls
AC 01.2 Non-Intrusive
Assembly, operation, commissioningOperation instructions

Read operation instructions first.
●Observe safety instructions.
●These operation instructions are part of the product.
●Retain operation instructions during product life.
●Pass on instructions to any subsequent user or owner of the product.
Purpose of the document:
This document contains information for installation, commissioning, operation and maintenance staff.It is intended
to support device installation and commissioning.
Reference documents:
●Manual (Operation and setting ) of actuator controls AC 01.2 Modbus
●Manual (Fieldbus device integration) of actuator controls AC 01.2 Modbus
Reference documents can be downloaded from the Internet (www.auma.com) or ordered directly from AUMA
(refer to <Addresses>).
Table of contents Page
51. Safety instructions................................................................................................................. 51.1. Basic information on safety 51.2. Range of application 61.3. Applications in Ex zone 22 (option) 71.4. Warnings and notes 71.5. References and symbols
82. Identification........................................................................................................................... 82.1. Short description 92.2. Name plate
133. Transport, storage and packaging........................................................................................ 133.1. Transport 143.2. Storage 143.3. Packaging
154. Assembly................................................................................................................................ 154.1. Mounting position 154.2. Handwheel fitting 164.3. Multi-turn actuator: mount to valve/gearbox 164.3.1. Output drive type A 174.3.1.1. Stem nut: finish machining 184.3.1.2. Multi-turn actuator (with output drive type A): mount to valve 194.3.2. Output drive types B and E 194.3.2.1. Multi-turn actuator with output drive types B: mount to valve/gearbox 204.4. Accessories for assembly 204.4.1. Stem protection tube for rising valve stem 214.5. Mounting positions of local controls 224.5.1. Mounting positions: modify
235. Electrical connection............................................................................................................. 235.1. Basic information 265.2. Electrical connection of actuator controls 265.2.1. SD electrical connection (AUMA plug/socket connector)
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SA 25.1 –SA 48.1/SAR 25.1 –SAR 30.1 Control unit: electronic (MWG)
Table of contents AC 01.2 Non-Intrusive Modbus RTU

275.2.1.1. Terminal compartment (for mains connection): open 285.2.1.2. Cable connection 295.2.1.3. Terminal compartment (for mains connection): close 305.2.1.4. Fieldbus terminal compartment: open 315.2.1.5. Fieldbus cables: connect 325.2.1.6. Fieldbus terminal compartment: close 335.3. Electrical connection of actuator 345.3.1. Motor connection 345.3.1.1. Motor connection compartment: open 345.3.1.2. Motor cables: connect 355.3.1.3. Motor connection compartment: close 365.3.2. S/SH electrical connection (AUMA plug socket connector) 365.3.2.1. Terminal compartment: open 375.3.2.2. Cable connection 385.3.2.3. Terminal compartment: close 395.4. Accessories for electrical connection 395.4.1. Actuator controls on wall bracket 405.4.2. Connection with control box 425.4.3. Parking frame 425.4.4. DS intermediate frame for double sealing 435.4.5. External earth connection
446. Operation................................................................................................................................ 446.1. Manual operation 446.1.1. Engage manual operation 456.1.2. Manual operation: disengage 456.2. Motor operation 456.2.1. Local actuator operation 466.2.2. Actuator operation from remote 466.3. Menu navigation via push buttons (for settings and indications) 476.3.1. Menu layout and navigation 486.4. User level, password 496.4.1. Password entry 496.4.2. Password change 506.5. Language in the display 506.5.1. Language change
527. Indications.............................................................................................................................. 527.1. Indications during commissioning 527.2. Indications in the display 537.2.1. Feedback indications from actuator and valve 557.2.2. Status indications according to AUMA classification 567.2.3. Status indications according to NAMUR recommendation 587.3. Indication lights of local controls 597.4. Optional indications 597.4.1. Mechanical position indication (self-adjusting) 597.4.2. Mechanical position indication via indicator mark
608. Signals (output signals)......................................................................................................... 608.1. Status signals via output contacts (digital outputs) 608.1.1. Assignment of outputs 608.1.2. Coding the outputs
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SA 25.1 –SA 48.1/SAR 25.1 –SAR 30.1 Control unit: electronic (MWG)
AC 01.2 Non-Intrusive Modbus RTU Table of contents

608.2. Analogue signals (analogue outputs)
619. Commissioning (basic settings)........................................................................................... 619.1. Type of seating: set 629.2. Torque switching: set 639.3. Limit switching: set 659.4. Fieldbus address (slave address), baud rate, parity and monitoring time: set 669.5. Test run 669.5.1. Direction of rotation at mechanical position indicator: check 679.5.2. Direction of rotation at hollow shaft/stem: check 689.5.3. Limit switching: check
6910. Commissioning (settings/options in the actuator)............................................................. 6910.1. Switch compartment: open/close 7010.2. Mechanical position indicator (self-adjusting) 7010.2.1. Mechanical position indicator: set 7110.2.2. Gear stage of the reduction gearing: test/set 7210.3. Mechanical position indication via indicator mark (not self-adjusting) 7210.3.1. Mechanical position indicator: set 7310.3.2. Gear stage of the reduction gearing: test/set
7511. Corrective action.................................................................................................................... 7511.1. Faults during commissioning 7511.2. Fault indications and warning indications 7911.3. Fuses 7911.3.1. Fuses within the actuator controls 8011.3.2. Fuse replacement 8011.3.2.1. Replace fuses F1/F2. 8011.3.2.2. Test/replace fuses F3/F4 8111.3.3. Motor protection (thermal monitoring)
8212. Servicing and maintenance................................................................................................... 8212.1. Preventive measures for servicing and safe operation 8312.2. Maintenance 8312.3. Disposal and recycling
8413. Technical data......................................................................................................................... 8413.1. Technical data Multi-turn actuators 8613.2. Technical data Actuator controls
9214. Spare parts............................................................................................................................. 9214.1. Multi-turn actuators SA 25.1 –SA 48.1/SAR 25.1 –SAR 30.1 9414.2. AC 01.2 actuator controls with SD electrical connection 9614.3. Wall bracket
9815. Certificates.............................................................................................................................. 9815.1. EU Declaration of Incorporation / Declaration of Conformity
99Index........................................................................................................................................
102Addresses...............................................................................................................................
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SA 25.1 –SA 48.1/SAR 25.1 –SAR 30.1 Control unit: electronic (MWG)
Table of contents AC 01.2 Non-Intrusive Modbus RTU

1. Safety instructions
1.1. Basic information on safety
Standards/directives Our products are designed and manufactured in compliance with recognised
standards and directives.This is certified in a Declaration of Incorporation and an
EU Declaration of Conformity.
The end user or the contractor must ensure that all legal requirements, directives,
guidelines, national regulations and recommendations with respect to assembly,
electrical connection, commissioning and operation are met at the place of installation.
They include among others:
●Applicable configuration guidelines for fieldbus applications.
Safetyinstructions/warn-
ings All personnel working with this device must be familiar with the safety and warning
instructions in this manual and observe the instructions given. Safety instructions
and warning signs on the device must be observed to avoid personal injury or property
damage.
Qualification of staff Assembly, electrical connection, commissioning, operation, and maintenance must
be carried out by suitably qualified personnel authorised by the end user or contractor
of the plant only.
Prior to working on this product, the staff must have thoroughly read and understood
these instructions and, furthermore, know and observe officially recognised rules
regarding occupational health and safety.
Commissioning Prior to commissioning, it is important to check that all settings meet the requirements
of the application. Incorrect settings might present a danger to the application, e.g.
cause damage to the valve or the installation.The manufacturer will not be held
liable for any consequential damage. Such risk lies entirely with the user.
Operation Prerequisites for safe and smooth operation:
●Correct transport, proper storage, mounting and installation, as well as careful
commissioning.
●Only operate the device if it is in perfect condition while observing these instruc-
tions.
●Immediately report any faults and damage and allow for corrective measures.
●Observe recognised rules for occupational health and safety.
●Observe national regulations.
●During operation,thehousing warms upandsurfacetemperatures >60°C may
occur.To prevent possible burns, we recommend checking the surface temper-
ature using an appropriate thermometer and wearing protective gloves, if re-
quired, prior to working on the device.
Protective measures The end user or the contractor are responsible for implementing required protective
measures on site, such as enclosures, barriers, or personal protective equipment
for the staff.
Maintenance To ensure safe device operation, the maintenance instructions included in this manual
must be observed.
Any device modification requires prior written consent of the manufacturer.
1.2. Range of application
AUMA multi-turn actuators are designed for the operation of industrial valves, e.g.
globe valves, gate valves, butterfly valves, and ball valves.
Other applications require explicit (written) confirmation by the manufacturer.
The following applications are not permitted, e.g.:
●Industrial trucks according to EN ISO 3691
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SA 25.1 –SA 48.1/SAR 25.1 –SAR 30.1 Control unit: electronic (MWG)
AC 01.2 Non-Intrusive Modbus RTU Safety instructions

●Lifting appliances according to EN 14502
●Passenger lifts according to DIN 15306 and 15309
●Service lifts according to EN 81-1/A1
●Escalators
●Continuous duty
●Buried service
●Continuous submersion (observe enclosure protection)
●Potentially explosive areas, with the exception of zone 22
●Radiation exposed areas in nuclear power plants
No liability can be assumed for inappropriate or unintended use.
Observance of these operation instructions is considered as part of the device's
designated use.
Information These operation instructions are only valid for the "clockwise closing" standard
version, i.e. driven shaft turns clockwise to close the valve.
1.3. Applications in Ex zone 22 (option)
Actuators of the indicated series basically meet the requirements for applications in
dust hazardous locations of ZONE 22 in compliance with the ATEX directive
2014/34/EU.
To comply with all requirements of the ATEX directive, observe the following points:
●Actuators are marked with the explosion protection designation II3D... for use
in ZONE 22.
●Maximum surface temperature of actuators
- T150 °C for ambient temperatures up to +60 °C or
- T190 °C for ambient temperatures up to +80 °C.
Increased dust deposit on the equipment was not considered for the determin-
ation of the maximum surface temperature.
●The following conditions must be fulfilled to respect the maximum permissible
surface temperatures at the actuator:
- Respecting types of duty and technical manufacturer data
- Correct connection of thermal motor protection (thermoswitches or PTC
thermistor)
Table 1: Maximum
surface temperature
Tripping temperature
Thermal motor protection
Ambient temperature
T150 °C140 °Cup to +60 °C
T190 °C155 °Cup to +80 °C
●The connector may only be connected or disconnected when not live.
●The cable glands and cable entries used have to meet the requirements of
category II3D and must at least comply with enclosure protection IP67.
●The actuators must be connected by means of an external earth connection
(accessory part) to the equipotential earth bonding or integrated into an earthed
piping system.
●To ensure combustible dust hazard protection, seal hollow shaft against ingress
of dust:
- Using threaded plug (ref. no. 511.0) and appropriate seal
- Using metallic stem protection tube, protective cap and V-seal (ref. no.
568.1, 568.2, 568.3) for rising valve stem
●As a general rule, the requirements of IEC 60079 Parts 14 and 17 must be re-
spected in dust hazardous locations.During commissioning, service, and
maintenance, special care as well as qualified and trained personnel are required
for safe actuator operation.
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SA 25.1 –SA 48.1/SAR 25.1 –SAR 30.1 Control unit: electronic (MWG)
Safety instructions AC 01.2 Non-Intrusive Modbus RTU

1.4. Warnings and notes
The following warnings draw special attention to safety-relevant procedures in these
operation instructions, each marked by the appropriate signal word (DANGER,
WARNING, CAUTION, NOTICE).
Indicates an imminently hazardous situation with a high level of risk. Failure
to observe this warning could result in death or serious injury.
Indicates a potentially hazardous situation with a medium level of risk.Failure
to observe this warning could result in death or serious injury.
Indicates a potentially hazardous situation with a low level of risk. Failure to
observe this warning may result in minor or moderate injury. May also be used
with property damage.
Potentially hazardous situation. Failure to observe this warning may result in
property damage. Is not used for personal injury.
Arrangement and typographic structure of the warnings
Type of hazard and respective source!
Potential consequence(s) in case of non-observance (option)
→Measures to avoid the danger
→Further measure(s)
Safety alert symbol warns of a potential personal injury hazard.
The signal word (here: DANGER) indicates the level of hazard.
1.5. References and symbols
The following references and symbols are used in these instructions:
Information The term Information preceding the text indicates important notes and information.
Symbol for CLOSED (valve closed)
Symbol for OPEN (valve open)
Important information before the next step.This symbol indicates what is required
for the next step or what has to be prepared or observed.
Via the menu to parameter
Describes the path within the menu to the parameter. By using the push buttons of
the local controls you may quickly find the desired parameter in the display.
< > Reference to other sections
Terms in brackets shown above refer to other sections of the document which provide
further information on this topic.These terms are either listed in the index, a heading
or in the table of contents and may easily be located.
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SA 25.1 –SA 48.1/SAR 25.1 –SAR 30.1 Control unit: electronic (MWG)
AC 01.2 Non-Intrusive Modbus RTU Safety instructions

2. Identification
2.1. Short description
Multi-turn actuator Definition in compliance with EN 15714-2/EN ISO 5210:
A multi-turn actuator is an actuator which transmits torque to a valve for at least one
full revolution.It is capable of withstanding thrust.
Figure 1: Example, Multi-turn actuator SA 25.1
AUMA multi-turn actuators SA 25.1 –SA 48.1/SAR 25.1 –SAR 30.1 are driven by
an electric motor and are capable of withstanding thrust in combination with output
drive type A.For manual operation, a handwheel is provided. Switching off in end
positions may be either by limit or torque seating.Actuator controls are required to
operate or process the actuator signals.
Actuator controls AC 01.2 actuator controls are used to operate AUMA actuators and are supplied
ready for use.The actuator controls may be mounted directly to the actuator or
separately on a wall bracket. For high nominal motor currents of the actuator, the
switchgear of the actuator controls require a control box.
Figure 2: Mounting variants actuator controls and control box
[1] Actuator controls directly mounted
[2] Actuator controls on wall bracket
[3] Control box
The functions of the AC 01.2 actuator controls include standard valve control in
OPEN-CLOSE duty, positioning, process control, logging of operating data, diagnostic
functions right through control via various interfaces (e.g. Fieldbus, Ethernet and
HART).
Local controls/
AUMA CDT Operation, setting, and display can be performed directly at the actuator controls or
alternatively from REMOTE via a fieldbus interface.
When set to local control, it is possible to
●operate the actuator via the local controls (push buttons and display) and perform
settings (contents of these instructions).
●read in or out data or modify and save settings via AUMA CDT software (ac-
cessory), using a computer (laptop or PC).The connection between computer
and actuator controls is wireless via Bluetooth interface (not included in these
instructions).
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SA 25.1 –SA 48.1/SAR 25.1 –SAR 30.1 Control unit: electronic (MWG)
Identification AC 01.2 Non-Intrusive Modbus RTU

2.2. Name plate
Figure 3: Arrangement of name plates
[1] Actuator name plate
[2] Actuator controls name plate
[3] Motor name plate
[4] Additional plate, e.g. KKS plate (Power Plant Classification System)
Actuator name plate
Figure 4: Actuator name plate (example)
(= manufacturer logo); (= CE mark)
[1] Name of manufacturer
[2] Address of manufacturer
[3] Type designation
[4] Order number
[5] Serial number
[6] Speed
[7] Torque range in direction CLOSE
[8] Torque range in direction OPEN
[9] Type of lubricant
[10] Permissible ambient temperature
[11] Can be assigned as an option upon customer request
[12] Enclosure protection
[13] Data Matrix code
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SA 25.1 –SA 48.1/SAR 25.1 –SAR 30.1 Control unit: electronic (MWG)
AC 01.2 Non-Intrusive Modbus RTU Identification

Actuator controls name plate
Figure 5: Name plate for actuator controls (example)
[1] Type designation
[2] Order number
[3] Serial number
[4] Actuator terminal plan
[5] Actuator controls terminal plan
[6] Mains voltage
[7] AUMA power class for switchgear
[8] Permissible ambient temperature
[9] Enclosure protection
[10] Control
[11] Data Matrix code
Motor name plate
Figure 6: Motor name plate (example)
(= manufacturer logo); (= CE mark)
[1] Motor type
[2] Motor article number
[3] Serial number
[4] Current type, mains voltage
[5] Rated power
[6] Rated current
[7] Type of duty
[8] Enclosure protection
[9] Motor protection (temperature protection)
[10] Insulation class
[11] Speed
[12] Power factor cos phi
[13] Mains frequency
[14] Data Matrix code
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SA 25.1 –SA 48.1/SAR 25.1 –SAR 30.1 Control unit: electronic (MWG)
Identification AC 01.2 Non-Intrusive Modbus RTU

Descriptions referring to name plate indications
Type designation Figure 7:Type designation (example)
1. Type and size of actuator
2. Flange size
Type and size
These instructions apply to the following devices types and sizes:
●Type SA = Multi-turn actuators for open-close duty
Sizes: 25.1, 30.1, 35.1, 40.1, 48.1
●Type SAR= Multi-turn actuators for modulating duty
Sizes: 25.1, 30.1
●Type AC = AUMATIC actuator controls
Size: 01.2
Order number The product can be identified using this number and the technical data as well as
order-related data pertaining to the device can be requested.
Please always state this number for any product inquiries.
On the Internet at http://www.auma.com > Service & Support > myAUMA, we offer
a service allowing authorised users to download order-related documents such as
wiring diagramsandtechnical data (both inGerman and English), inspectioncertificate
and the operation instructions when entering the order number.
Actuator serial number Table 2:
Description of serial number (with example 0516MD12345)
MD123451605
Positions 1+2: Assembly in week = week 0505
Positions 3+4:Year of manufacture = 201616
Internal number for unambiguous product identificationMD12345
Actuator terminal plan Position 9 after TPA: Position transmitter version
I, Q = MWG (magnetic limit and torque transmitter)
AUMA power class for
switchgear The switchgear used in the actuator controls (reversing contactors/thyristors) are
classified according to AUMA power classes (e.g.A1, B1, ....).The power class
defines the max. permissible rated power (of the motor) the switchgear has been
designed for.The rated power (nominal power) of the actuator motor is indicated in
kW on the motor name plate.For the assignment of the AUMA power classes to the
nominal power of the motor types, refer to the separate electrical data sheets.
For switchgear without assignment to any power classes, the actuator controls name
plate does not indicate the power class but the max. rated power in kW.
Control Table 3:
Control examples (indications on actuator controls name plate)
DescriptionInput signal
Control vie Modbus RTU interfaceModbus RTU
Control via Modbus RTU interface and control voltage for OPEN - CLOSE
Control via digital inputs (OPEN, STOP, CLOSE)
Modbus RTU/24 V DC
Data Matrix code Whenregisteredasauthoriseduser, youmayuseourAUMA Assistant App to scan
the Data Matrix code and directly access the order-related product documents without
having to enter order number or serial number.
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SA 25.1 –SA 48.1/SAR 25.1 –SAR 30.1 Control unit: electronic (MWG)
AC 01.2 Non-Intrusive Modbus RTU Identification

Figure 8: Link to AUMA Assistant App:
For further Service & Support, software/apps/...refer to www.auma.com.
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SA 25.1 –SA 48.1/SAR 25.1 –SAR 30.1 Control unit: electronic (MWG)
Identification AC 01.2 Non-Intrusive Modbus RTU

3. Transport, storage and packaging
3.1. Transport
For transport to place of installation, use sturdy packaging.
Hovering load!
Risk of death or serious injury.
→Do NOT stand below hovering load.
→Attach ropes or hooks for the purpose of lifting by hoist only to housing and NOT
to handwheel.
→Actuators mounted on valves: Attach ropes or hooks for the purpose of lifting
by hoist to valve and NOT to actuator.
→Actuatorsmountedtogearboxes:Attachropes orhooks forthe purposeof lifting
by hoist only to the gearbox using eyebolts and NOT to the actuator.
→Actuators mounted to controls: Attach ropes or hooks for the purpose of lifting
by hoist only to the actuator and NOT to the controls.
→Respect total weight of combination (actuator, actuator controls, gearbox, valve)
→Secure load against falling down, sliding or tilting.
→Perform lift trial at low height to eliminate any potential danger e.g.by tilting.
Figure 9: Example: Lifting the actuator
Table 4:
Weight for AC 01.2 actuator controls
Weight approx. [kg]with electrical connection type:
7AUMA plug/socket connector with screw-type connection
Table 5:
Weights for multi-turn actuators SA 25.1 –SA 48.1 / SAR 25.1 –SAR 30.1
with 3-phase AC motors
Weight2) Motor type1) Type designation
Actuator approx. [kg]
150AD... 90-...SA 25.1/
SAR 25.1 160AD... 132-...
190AD... 112-...SA 30.1/
SAR 30.1 260AD... 160-...
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SA 25.1 –SA 48.1/SAR 25.1 –SAR 30.1 Control unit: electronic (MWG)
AC 01.2 Non-Intrusive Modbus RTU Transport, storage and packaging

Weights for multi-turn actuators SA 25.1 –SA 48.1 / SAR 25.1 –SAR 30.1
with 3-phase AC motors
Weight2) Motor type1) Type designation
Actuator approx. [kg]
410AD... 132-...SA 35.1
425AD... 160-...
510AD... 160-...SA 40.1
750AD... 180-...SA 48.1
Refer to motor name plate1) Indicated weight includes AUMA NORM multi-turn actuator with 3-phase AC motor, electrical con-
nection in standard version, output drive type B1 and handwheel.For other output drive types, heed
additional weights.
2)
Table 6:
Weights for output drive type A 25.2 –A 40.2
[kg]Flange sizeType designation
42F 25.2A 25.2
69F 30.2A 30.2
126F 35.2A 35.2
202F 40.2A 40.2
3.2. Storage
Danger of corrosion due to inappropriate storage!
→Store in a well-ventilated, dry room.
→Protect against floor dampness by storage on a shelf or on a wooden pallet.
→Cover to protect against dust and dirt.
→Apply suitable corrosion protection agent to uncoated surfaces.
Damage on display caused by temperatures below permissible level!
→AC actuator controls MUST NOT be stored below –30 °C.
Long-term storage For long-term storage (more than 6 months), observe the following points:
1. Prior to storage:
Protect uncoated surfaces, in particular the output drive parts and mounting
surface, with long-term corrosion protection agent.
2. At an interval of approx. 6 months:
Check for corrosion.If first signs of corrosion show, apply new corrosion protec-
tion.
3.3. Packaging
Our products are protected by special packaging for transport when leaving the
factory.The packaging consists of environmentally friendly materials which can easily
be separated and recycled.We use the following packaging materials: wood,
cardboard, paper, and PE foil.For the disposal of the packaging material, we
recommend recycling and collection centres.
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SA 25.1 –SA 48.1/SAR 25.1 –SAR 30.1 Control unit: electronic (MWG)
Transport, storage and packaging AC 01.2 Non-Intrusive Modbus RTU

4. Assembly
4.1. Mounting position
The product described in this document can be operated without restriction in any
mounting position.
4.2. Handwheel fitting
Information For transportreason,handwheels witha diameterof 400mm andlarger aresupplied
separately within the scope of delivery.
Damage at the change-over mechanism due to incorrect assembly!
→Only pivot change-over lever manually.
→Do NOT use extensions as lever for operation.
→First engage manual operation correctly, then mount handwheel.
1. Manually lift the red change-over lever while slightly turning the shaft back and
forth until manual operation engages.
➥Manual operation is properly engaged if the change-over lever can be shifted
by approx. 85°.
Figure 10:
2. Push handwheel over the red change-over lever then onto the shaft.
Figure 11:
3. Release change-over lever (should snap back into initial position by spring ac-
tion, if necessary, push it back manually).
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SA 25.1 –SA 48.1/SAR 25.1 –SAR 30.1 Control unit: electronic (MWG)
AC 01.2 Non-Intrusive Modbus RTU Assembly

4. Secure handwheel using the retaining ring supplied.
Figure 12:
4.3. Multi-turn actuator: mount to valve/gearbox
Danger of corrosion due to damage to paint finish and condensation!
→Touch up damage to paint finish after work on the device.
→After mounting, connect the device immediately to electrical mains to ensure
that heater minimises condensation.
4.3.1. Output drive type A
Application ●Output drive for rising, non-rotating valve stem
●Capable of withstanding thrust
Design Output mounting flange [1] with axial bearing stem nut [2] form one unit.Torque is
transmitted to valve stem [3] via stem nut [2].
Figure 13: Design of output drive type A
[1] Output mounting flange
[2] Stem nut with dog coupling
[3] Valve stem
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SA 25.1 –SA 48.1/SAR 25.1 –SAR 30.1 Control unit: electronic (MWG)
Assembly AC 01.2 Non-Intrusive Modbus RTU

4.3.1.1. Stem nut: finish machining
✔This working step is only required if stem nut is supplied unbored or with pilot
bore.
Figure 14: Output drive type A
[1] Stem nut
[2] Axial needle roller bearing
[2.1] Axial bearing washer
[2.2] Axial needle roller and cage assembly
[3] Spigot ring
1. Remove spigot ring [3] from output drive.
2. Remove stem nut [1] together with axial needle roller bearings [2].
3. Remove axial bearing washers [2.1] and axial needle roller and cage assemblies
[2.2] from stem nut [1].
Information: For output drive types A from size 35.2 and larger: Record the
order of axial bearing washers [2.1].
4. Drill and bore stem nut [1] and cut thread.
Information: When fixing in the chuck, make sure stem nut runs true!
5. Clean the machined stem nut [1].
6. Apply sufficient Lithium soap EP multi-purpose grease to axial needle roller and
cage assemblies [2.2] and axial bearing washers [2.1], ensuring that all hollow
spaces are filled with grease.
7. Place greased axial needle roller and cage assemblies [2.2] and axial bearing
washers [2.1] onto stem nut [1].
Information: For output drive types A from size 35.2:Observe correct order of
axial bearing washers [2.1].
8. Re-insert stem nut [1] with bearings [2] into output drive.
Information: Ensure that dogs or splines are placed correctly in the keyway of
the hollow shaft.
9. Screw in spigot ring [3] until it is firm against the shoulder.
17
SA 25.1 –SA 48.1/SAR 25.1 –SAR 30.1 Control unit: electronic (MWG)
AC 01.2 Non-Intrusive Modbus RTU Assembly

4.3.1.2. Multi-turn actuator (with output drive type A): mount to valve
Figure 15: Assembly of output drive type A
[1] Valve stem
[2] Output drive type A
[3] Screws to actuator
[4] Valve flange
[5] Screws to output drive
1. If the output drive type A is already mounted to the multi-turn actuator:Loosen
screws [3] and remove output drive type A [2].
2. Check if the flange of output drive type A matches the valve flange [4].
3. Apply a small quantity of grease to the valve stem [1].
4. Place output drive type A on valve stem and turn until it is flush on the valve
flange.
5. Turn output drive type A until alignment of the fixing holes.
6. Screw in fastening screws [5], however do not completely tighten.
7. Fit multi-turn actuator on the valve stem so that the stem nut dogs engage into
the output drive sleeve.
➥The flanges are flush with each other if properly engaged.
8. Adjust multi-turn actuator until alignment of the fixing holes.
9. Fasten multi-turn actuator with screws [3].
10. Fasten screws [3] crosswise with a torque according to table.
Table 7:
Tightening torques for screws
Tightening torque [Nm]Threads
Strength class
A2-808.8
200214M16
392431M20
1,4221,489M30
2,4812,594M36
11. Turn multi-turn actuator with handwheel in direction OPEN until valve flange
and output drive A are firmly placed together.
12. Tighten fastening screws [5] between valve and output drive type A crosswise
applying a torque according to table.
18
SA 25.1 –SA 48.1/SAR 25.1 –SAR 30.1 Control unit: electronic (MWG)
Assembly AC 01.2 Non-Intrusive Modbus RTU

4.3.2. Output drive types B and E
Application ●For rotating, non-rising valve stem
●Not capable of withstanding thrust
Design For output drive types B/B1/B2, the connection to the valve or the gearbox is made
by directly placing the multi-turn actuator hollow shaft onto the input shaft of the valve
or gearbox.
For output drive types B3/B4/E, the connection is made via output drive sleeve which
is inserted into the bore of the hollow shaft of the multi-turn actuator and fixed by a
retaining ring.
When exchanging the output drive sleeve, later retrofitting to a different output drive
type is possible
Figure 16: Output drive type B
[1] Multi-turn actuator flange
[2] For output drive types B/B1/B2 hollow shaft with keyway
[2]* For output drive types B3/B4/E, an output drive sleeve is fitted into the hollow
shaft
[3] Gearbox/valve shaft with parallel key
Information Spigot at valve flanges should be loose fit.
4.3.2.1. Multi-turn actuator with output drive types B: mount to valve/gearbox
Figure 17: Mounting output drive types B
[1] Multi-turn actuator
[2] Valve/gearbox
[3] Valve/gearbox shaft
1. Check if mounting flanges fit together.
19
SA 25.1 –SA 48.1/SAR 25.1 –SAR 30.1 Control unit: electronic (MWG)
AC 01.2 Non-Intrusive Modbus RTU Assembly

2. Check if output drive of multi-turn actuator [1] matches the output drive of
valve/gearbox or valve/gearbox valve shaft [2/3].
3. Apply a small quantity of grease to the valve or gearbox shaft [3].
4. Fit multi-turn actuator [1].
Information: Ensure that the spigot fits uniformly in the recess and that the
mounting faces are in complete contact.
5. Fasten multi-turn actuator with screws according to table.
Information: We recommend applying liquid thread sealing material to the
screws to avoid contact corrosion.
6. Fasten screws crosswise to a torque according to table.
Table 8:
Tightening torques for screws
Tightening torque [Nm]Threads
Strength class
A2-808.8
200214M16
392431M20
1,4221,489M30
2,4812,594M36
4.4. Accessories for assembly
4.4.1. Stem protection tube for rising valve stem
Figure 18: Assembly of the stem protection tube
[1] Protective cap for stem protection tube (fitted)
[1]* Option for size 25.1: Protective cap made of steel (screwed)
[1]** Option from size 30.1: Protective cap made of steel (welded)
[2] Stem protection tube
[3] V-seal
1. Seal all threads with hemp,Teflon tape, or thread sealing material.
20
SA 25.1 –SA 48.1/SAR 25.1 –SAR 30.1 Control unit: electronic (MWG)
Assembly AC 01.2 Non-Intrusive Modbus RTU