Siemens ACVATIX SKC Manual
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Siemens ACVATIX SKC Manual

Siemens ACVATIX SKC Manual

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ACVATIX™
Elektrohydraulische Stellantriebe für Ventile
SKC..
CM1N456en
2024-11-27
with 40 mm stroke
●
SKC32.. operating voltage AC 230 V, 3-position control signal
●
SKC82.. operating voltage AC 24 V, 3-position control signal
●
SKC6.. op. voltage AC 24 V, control signal DC 0...10 V, 4...20 mA, 0...1000 Ω
– SKC62/MO RS-485 for Modbus RTU communication
– Selectable flow characteristic, position feedback, stroke calibration, LED status
indication, override control
– SKC62UA 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 2800 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 and stem heater
●
SKC..U are UL-approved
Smart Infrastructure

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Summary of Contents for Siemens ACVATIX SKC

  • Page 1 ACVATIX™ Elektrohydraulische Stellantriebe für Ventile SKC.. with 40 mm stroke ● SKC32.. operating voltage AC 230 V, 3-position control signal ● SKC82.. operating voltage AC 24 V, 3-position control signal ● SKC6.. 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.. and VXF.. with 40 mm stroke as control and safety shut-off valves in heating, ventilation and air conditioning plants. Technical design Principle of electro-hydraulic actuators Hand crank...
  • Page 3 SKC62UA 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 CM1N456en 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) SKC60 , SKC62.. Connection terminals DIL switches LED status indication Stroke calibration Up to and including version ..K Siemens CM1N456en 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 CM1N456en 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 SKC6.. 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 tion monitor End pos. at 900 Ω QAF21.. or QAF61.. ● Valve stroke follows ● Y input has no effect ● Valve stroke follows Y input Y and R(Z) signal Siemens CM1N456en Smart Infrastructure 2024-11-27...
  • Page 8 Selection of direction of operation SKC60 (from version ..L), SKC62UA ● 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 [▶ 12]". ●...
  • 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 CM1N456en 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 SKC62/MO / S55195-A128 Actuator Modbus RTU ASC1.6 / BPZ:ASC1.6 Auxiliary switch Siemens CM1N456en Smart Infrastructure 2024-11-27...
  • Page 11 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 12: Spare Parts

    50...400 N4404 VVF42.. 100...150 125...400 N4403 VVF53.. 65...150 63...400 N4405 VVF61.. 49...300 N4382 15...50 VVF63.. 50...315 A6V11459527 Permissible differential pressure Δp and closing pressure Δp : cf. relevant valve data sheets Valves no longer available Siemens CM1N456en Smart Infrastructure 2024-11-27...
  • Page 13 For SKC32.. and SKC82.., 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 SKC..
  • Page 14 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 15 The mounting instructions M3240 / 74 319 0324 0 for fitting the actuator to the valve and A5W00027551 for SKC62/MO are enclosed in the actuator packaging. The instructions for accessories are enclosed with the accessories themselves (see "Product documentation [▶ 13]"). Mounting positions Siemens CM1N456en Smart Infrastructure 2024-11-27...
  • Page 16 → Stroke = 0 % → Stroke = 100 % The hand crank must be rotated counter-clockwise to the end stop, in order to close the Siemens valves of the series VVF.. and VXF.. (stroke = 0 %). Operation Automatic operation For automatic operation, the crank [2] on the manual stroke adjuster [1] must be engaged.
  • 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

    20 s Spring-return time SKC32.61, SKC32.61/F 18 s SKC82.61, SKC82.61U SKC62.. 20 s Positioning force 2800 N Nominal stroke 40 mm Maximum permissible medium temperature (fitted valve) -25...220 °C < 0 °C: Requires stem heater ASZ6.6 Siemens CM1N456en 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 SKC62UA Frost protection monitor QAF21.. Frost protection monitor DC 1.6 V, added to Y signal QAF61.. Siemens CM1N456en Smart Infrastructure 2024-11-27...
  • Page 21 Environmental conditions Operation IEC 60721-3-3 (1994) Climatic conditions Class 3K5 Temperature, general -15...55 °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 CM1N456en Smart Infrastructure 2024-11-27...
  • Page 22 Weight SKC32.60, SKC32.60/F 9.80 kg SKC32.61, SKC32.61/F 9.85 kg SKC82.60 9.80 kg SKC82.60U 10.10 kg SKC82.61 9.85 kg SKC82.61U 10.15 kg SKC60 9.85 kg SKC62, SKC62/MO External Modbus converter 0.15 kg SKC62U, SKC62UA 10.15 kg Siemens CM1N456en 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 CM1N456en Smart Infrastructure 2024-11-27...

  • Page 24: Connection Diagrams

    Neutral conductor SKC82.. SKC82.61.. SKC82.60.. 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 CM1N456en 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 CM1N456en Smart Infrastructure 2024-11-27...

  • Page 26: Connection Terminals

    [▶ 7]") SKC62/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 CM1N456en Smart Infrastructure 2024-11-27...
  • Page 27 Connection diagrams SKC32.. SKC32.61.. SKC32.60.. 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 CM1N456en Smart Infrastructure 2024-11-27...
  • Page 28 AC 24 V 3-position Safety limiter (e.g. temper- (Y1), (Y2) Controller contacts ature limiter) System potential AC 24 V Y1 Positioning signal "open" N1, N2 Controller System neutral Positioning signal "close" Y1, Y2 Actuators Spring-return function Siemens CM1N456en 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 SKC62UA: only with sequence control and the appropriate rotary switch settings, see "Electronics [▶ 5]", "Functions [▶ 6]" Siemens CM1N456en 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 CM1N456en Smart Infrastructure 2024-11-27...
  • Page 31 SKC..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. External Modbus converter Dimensions in mm 250 mm Siemens CM1N456en Smart Infrastructure 2024-11-27...

  • Page 32: Revision Numbers

    Revision numbers Type Valid from rev no. Type Valid from rev no. SKC32.60 SKC60 SKC32.60/F SKC62 SKC32.61 SKC62/F SKC32.61/F SKC62U SKC82.60 SKC62UA SKC82.60U SKC62/MO SKC82.61 SKC82.61U Siemens CM1N456en 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 CM1N456en Edition 2024-11-27...

This manual is also suitable for:

Acvatix skc32.60Acvatix skc32.60/fAcvatix skc32.61Acvatix skc32.61/fAcvatix skc82.60Acvatix skc82.60u ... Show all

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