Siemens ACVATIX SKD Series Manual
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Siemens ACVATIX SKD Series Manual

Siemens ACVATIX SKD Series Manual

Electro-hydraulic actuators for valves
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ACVATIX™
Electro-hydraulic actuators for valves
SKD..
CM1N4561en
2024-11-27
with 20 mm stroke
●
SKD32.. operating voltage AC 230 V, 3-position control signal
●
SKD82.. operating voltage AC 24 V, 3-position control signal
●
SKD6.. op. voltage AC 24 V, control signal DC 0...10 V, 4...20 mA, 0...1000 Ω
– SKD62/MO RS-485 for Modbus RTU communication
– Selectable flow characteristic, position feedback, stroke calibration, LED status
indication, override control
– SKD62UA with selection of direction of operation, stroke limit control, se-
quence control with adjustable start point and operating range, operation of
frost protection monitors QAF21.. and QAF61..
●
Positioning force 1000 N
●
For direct mounting on valves; no adjustments required
●
With hand crank and position indication; optionally with/out spring-return function
●
Optional functions with auxiliary switches, potentiometer, stem heater and me-
chanical stroke inverter
●
SKD..U are UL-approved
Smart Infrastructure

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Summary of Contents for Siemens ACVATIX SKD Series

  • Page 1 ACVATIX™ Electro-hydraulic actuators for valves SKD.. with 20 mm stroke ● SKD32.. operating voltage AC 230 V, 3-position control signal ● SKD82.. operating voltage AC 24 V, 3-position control signal ● SKD6.. op. voltage AC 24 V, control signal DC 0...10 V, 4...20 mA, 0...1000 Ω –...
  • Page 2 For the operation of Siemens 2-port and 3-port valves of the series VVF.., VVG.., VXF.. and VXG.. with 20 mm stroke as control and safety shut-off valves in heating, ventilation and air conditioning plants. Technical design Principle of electro-hydraulic actuators...
  • Page 3 SKD62UA actuators. Notes on special programming of the electronics can be found in "Electronics [▶ 5]". Connection diagrams for operation with frost protection thermostat or monitor can be found in "Connection diagrams [▶ 27]". Siemens CM1N4561en Smart Infrastructure 2024-11-27...
  • Page 4 * Factory setting: all switches "OFF" flow ** Only considered when DIL switch 3 "ON" (positioning sig- nal = DC 4...20 mA) SKD60.. , SKD62.. Connection terminals DIL switches LED status indication Stroke calibration Up to and including version ..K Siemens CM1N4561en Smart Infrastructure 2024-11-27...
  • Page 5 = linear Signal addition QAF21../QAF61.. OFF * Direct acting Stroke limit control DC 0...10 V log = equal percent- Relationship between posi- tioning signal Y and volume flow * Factory setting: all switches "OFF" Siemens CM1N4561en Smart Infrastructure 2024-11-27...
  • Page 6 In order to determine the stroke positions 0 % and 100 % in the valve, calibration is required on initial commissioning. ✓ Actuator SKD6.. mechanically coupled with a Siemens valve. ✓ Actuator must be in "Automatic operation mode" enabling stroke calibration to capture the effective 0 % and 100 % values.
  • Page 7 ● Starting pos. at 50 Ω QAF21.. or QAF61.. End pos. at 900 Ω ● Valve stroke follows ● Y input has no effect ● Valve stroke follows Y input Y and R(Z) signal Siemens CM1N4561en Smart Infrastructure 2024-11-27...
  • Page 8 Selection of direction of operation SKD60.. (from version ..L), SKD62UA ● With NC (= normally closed) valves, "direct acting" means that with a signal input of 0 V, the valve closes (applies to all Siemens valve listed in "Equipment combinations [▶ 13]". ●...
  • Page 9 Operating range QAF21.. (see "Stroke control with QAF21.. / QAF61.. signal addition", "Functions [▶ 8]") Operating range QAF61.. (see "Stroke control with QAF21.. / QAF61.. signal addition", "Functions [▶ 8]") The smallest adjustment possible is 3 V; control with 0...30 V is only possible via Y. Siemens CM1N4561en Smart Infrastructure 2024-11-27...

  • Page 10: Type Summary

    The actuator, valve and accessories are supplied in separate packaging and not assembled prior to delivery. Ordering example Type / Stock no. Designation Quantity SKD62/MO / S55195-A129 Actuator Modbus RTU ASC1.6 / BPZ:ASC1.6 Auxiliary switch Siemens CM1N4561en Smart Infrastructure 2024-11-27...
  • Page 11 ● Mount between valve and actuator SKD32.. ASC9.3 [BPZ:ASC9.3] ASZ7.3 [BPZ:ASZ7.3] SKD82.. Double auxiliary switch Potentiometer ● ● 0...1000 Ω Adjustable switching points SKD60.. ASC1.6 [BPZ:ASC1.6] SKD62.. Auxiliary switch ● Switching point 0...5 % stroke Siemens CM1N4561en Smart Infrastructure 2024-11-27...
  • Page 12 DC 0...9.8 V feedback signals. The signal peaks occurring in the potentiometer ASZ7.3 may result in error messages on Siemens SIMATIC. This is not the case when combined with Siemens HVAC control- lers. The reason is that SIMATIC has a higher resolution and faster response time.

  • Page 13: Equipment Combinations

    15...80 1.6...100 N4403 VXF53.. 1.6...40 N4405 VXF61.. 1.9...31 N4482 15...50 VXF63.. 0.2...36 A6V11459527 VXG41.. Threaded 1.6...40 N4463 Permissible differential pressure Δp and closing pressure Δp : cf. relevant valve data sheets Valves no longer available Siemens CM1N4561en Smart Infrastructure 2024-11-27...
  • Page 14 For SKD32.. and SKD82.., the Y1 signal must be routed via an additional, freely adjustable end switch (ASC9.3) to limit the stroke. We recommend that you contact your local Siemens office for the necessary information. Product documentation SKD..
  • Page 15 Dismount valve-actuator combination (control device) as complete unit. ● Disassembly only by qualified personnel. ● Send the control device along with an error report to the local Siemens office for analy- sis and disposal. ● Mount new control device (valve and actuator) properly.
  • Page 16 The hand crank must be rotated counter-clockwise to the end stop, i.e. until the red indica- tor marked "MAN" is no longer visible. This closes the Siemens valves of the series VVF.., VVG.., VXF.. and VXG.. (stroke = 0 %).
  • Page 17 Dismount valve-actuator combination (control device) as complete unit. ● Disassembly only by qualified personnel. ● Send the control device along with an error report to the local Siemens office for analy- sis and disposal. ● Mount new control device (valve and actuator) properly.
  • Page 18 For additional details, refer to Siemens information on disposal. Warranty The application-specific technical data is guaranteed only in combination with the Siemens products listed in the "Equipment combinations" section. If third-party products are used, any guarantee provided by Siemens will be invalidated. Siemens...

  • Page 19: Technical Data

    30 s Closing Spring-return time SKD32.21, SKD32.51 SKD82.51, SKD82.51U SKD62.. 15 s Positioning force 1000 N Nominal stroke 20 mm Maximum permissible medium temperature (fitted valve) -25...150 °C < 0 °C: Requires stem heater ASZ6.6 Siemens CM1N4561en Smart Infrastructure 2024-11-27...
  • Page 20 Operating range of se- 3...15 V adjustable quence Signal addition Z connected to R of 0...1000 Ω, added to Y signal SKD62UA Frost protection monitor QAF21.. Frost protection monitor DC 1.6 V, added to Y signal QAF61.. Siemens CM1N4561en Smart Infrastructure 2024-11-27...
  • Page 21 Environmental conditions Operation IEC 60721-3-3 (1994) Climatic conditions Class 3K5 Temperature, general -15...50 °C Humidity (non-condensing) 5...95 % r.h. Transportation IEC 60721-3-2 (1994) Climatic conditions Class 2K3 Temperature -30...65 °C Humidity (non-condensing) 5...95 % r.h. Siemens CM1N4561en Smart Infrastructure 2024-11-27...
  • Page 22 3.60 kg SKD32.51 3.65 kg SKD82.50 3.60 kg SKD82.50U 3.85 kg SKD82.51 3.65 kg SKD82.51U 3.90 kg SKD60 3.60 kg SKD62, SKD62/MO External Modbus converter 0.15 kg SKD62U, SKD62UA 3.85 kg Stroke inverter ASK50 1.10 kg Siemens CM1N4561en Smart Infrastructure 2024-11-27...
  • Page 23 (Max. temperature 85 °C / 185 °F) At room temperature (23 °C); low ambient temperatures or high Δp may prolong these times. From version ..L onward AWG = American wire gauge The documents can be downloaded at http://www.siemens.com/bt/download Siemens CM1N4561en Smart Infrastructure 2024-11-27...

  • Page 24: Connection Diagrams

    Neutral conductor SKD82.. SKD82.51.. SKD82.50.. AC 24 V 3-position End switch Positioning signal "open" Solenoid valve for spring-return Positioning signal "close" c1, c2 ASC9.3 double auxiliary switch Spring-return function a, b, c ASZ7.3 potentiometer System potential Siemens CM1N4561en Smart Infrastructure 2024-11-27...
  • Page 25 Reference (Modbus RTU) Override control Bus + (Modbus RTU) Positioning signal Bus - (Modbus RTU) Measuring neutral Operating voltage AC 24 V: System neutral (SN) Operating voltage AC 24 V: System potential (SP) De-energize for spring-return function Siemens CM1N4561en Smart Infrastructure 2024-11-27...

  • Page 26: Connection Terminals

    [▶ 7]") SKD62/MO AC 24 V Modbus RTU connecting cable System neutral (SN) black System potential (SP) Reference line (Modbus RTU) purple Bus + (Modbus RTU) gray Bus - (Modbus RTU) pink Auxiliary switch ASC1.6 Siemens CM1N4561en Smart Infrastructure 2024-11-27...
  • Page 27 Connection diagrams SKD32.. SKD32.21, SKD32.51.. SKD32.50.. AC 230 V 3-position Safety limiter (e.g. temperature limiter) Positioning signal "open" N1, N2 Controller Phase Positioning signal "close" Y1, Y2 Actuators Neutral Spring-return function Siemens CM1N4561en Smart Infrastructure 2024-11-27...
  • Page 28 SKD82.50.. AC 24 V 3-position Safety limiter (e.g. temper- (Y1), (Y2) Controller contacts ature limiter) System potential AC 24 Positioning signal "open" N1, N2 Controller System neutral Positioning signal "close" Y1, Y2 Actuators Spring-return function Siemens CM1N4561en Smart Infrastructure 2024-11-27...
  • Page 29 Frost protection thermostat G0 (SN) System neutral Terminals Frost hazard/sensor is interrupted (closes with frost) Normal operation Only SKD62UA: only with sequence control and the appropriate rotary switch settings, see "Electronics [▶ 5]", "Functions [▶ 6]" Siemens CM1N4561en Smart Infrastructure 2024-11-27...
  • Page 30 When using a safety limiter F1, ensure that no mistakes occur when insulating cables that may cancel out the temperature limiter function (applies to both 230 V as well as 24 V types). ● For SN grounding (e.g. PELV), comply under all circumstances with the note above. Siemens CM1N4561en Smart Infrastructure 2024-11-27...
  • Page 31 SKD..U: with knockouts for standard ½" conduit connectors (∅ 21.5 mm) > 100 mm, minimum clearance from ceiling or wall for mounting > 200 mm, for connection, operation, maintenance, etc. Stroke inverter ASK50 Dimensions in mm Maximum stroke = 20 mm Siemens CM1N4561en Smart Infrastructure 2024-11-27...

  • Page 32: External Modbus Converter

    External Modbus converter Dimensions in mm 250 mm Revision numbers Type Valid from rev no. Type Valid from rev no. SKD32.21 SKD60 SKD32.50 SKD62 SKD32.51 SKD62U SKD82.50 SKD62UA SKD82.50U SKD62/MO SKD82.51 SKD82.51U Siemens CM1N4561en Smart Infrastructure 2024-11-27...
  • Page 33 Issued by © Siemens 1998 - 2024 Siemens Switzerland Ltd Technical specifications and availability subject to change without notice. Smart Infrastructure Global Headquarters Theilerstrasse 1a CH-6300 Zug +41 58 724 2424 www.siemens.com/buildingtechnologies Document ID CM1N4561en Edition 2024-11-27...

This manual is also suitable for:

Acvatix skd32.21Acvatix skd32.50Acvatix skd32.51Acvatix skd82.50Acvatix skd82.50uAcvatix skd82.51 ... Show all

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