SMC Networks PFCQ531 Series Operation Manual
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SMC Networks PFCQ531 Series Operation Manual

Flow controller for air
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Doc. no. DOC1048409
PRODUCT NAME
Flow Controller for Air
MODEL / Series / Product Number
PFCQ531 Series

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Summary of Contents for SMC Networks PFCQ531 Series

  • Page 1 Doc. no. DOC1048409 PRODUCT NAME Flow Controller for Air MODEL / Series / Product Number PFCQ531 Series...

  • Page 2: Table Of Contents

    Contents Product Outline and Features ............... 3 Safety Instructions ..................4 Items Included in the Package ..............6 Names and Functions of Product Parts ............7 How to Order ....................8 Specifications ....................9 General specifications ................9 Electrical specifications ...............
  • Page 3 Maintenance ....................39 Maintenance and Inspection 14-1 ............. 39 Troubleshooting 14-2 .................. 40 (1) Operation problems ................40 (2) Flow rate control problems ..............41 (3) Output signal problems ................45 (4) Flow rate display problem ..............46 LED indication and error measures 14-3 ..........

  • Page 4: Product Outline And Features

    1. Product Outline and Features This product controls the flow rate of air and nitrogen gas according to the analog signal (voltage signal 1 to 5 V or current signal 4 to 20 mA) that is input from an external device such as a PLC. The following describes the main characteristics and functions of this product.

  • Page 5: Safety Instructions

    2. Safety Instructions Safety Instructions These safety instructions are intended to prevent hazardous situations and/or equipment damage. These instructions indicate the level of potential hazard with the labels of “Caution,” “Warning” or “Danger.” They are all important notes for safety and must be followed in addition to International Standards (ISO/IEC) , and other safety regulations.
  • Page 6 Safety Instructions Caution The product is provided for use in manufacturing industries. The product herein described is basically provided for peaceful use in manufacturing industries. If considering using the product in other industries, consult SMC beforehand and exchange specifications or a contract if necessary. If anything is unclear, contact your nearest sales branch.

  • Page 7: Items Included In The Package

    3. Items Included in the Package ● Accessories Protective plug (PFCQP-910S-31) Flow controller for Air (body) ● Options (The following items are included in the package depending on the model selected for the flow controller for Air.) Digital flow monitor (PFG310-XY-M-Y-X105) Power supply cable (PFCQ531-H1-3) Lead wire with connector (ZS-33-D) (for connection with the digital flow monitor)

  • Page 8: Names And Functions Of Product Parts

    4. Names and Functions of Product Parts D-sub connector F.G. Power supply LED Error LED Flow rate display connector (with protective plug) Piping port (OUT side) Protective plug Piping port (IN side) Name Function Power supply (PWR) When 24 V power is supplied and the system starts the operation, this LED turns ON and flashes.

  • Page 9: How To Order

    5. How to Order PFCQ5 31 – 04 - A1 C - S M Flow controller (Display separate type) Rated flow range (flow rate range) 9 to 300L/min Port size Rc1/2 Input/Output specifications (See the Input/Output Specification Table.) Option 1 (Power supply cable) None Note: Optional parts are not mounted to the product.

  • Page 10: Specifications

    6. Specifications 6-1. General specifications Model PFCQ531-04-A* Dry air, N2 Fluid Applicable fluid (Air quality classes: JIS B8392-1 1.1.2 to 1.6.2; ISO8573-1 1.1.2 to 1.6.2 Detection type Hot wire anemometer Flow rate Rated controlled flow 9 to 300 L/min specifications rate range *2, *3 Set controlled flow rate...

  • Page 11: Electrical Specifications

    6-2. Electrical specifications Model PFCQ531-04-A* Main power supply: 24 VDC +/-10% Power supply voltage Signal power supply: 24 VDC +/-10% Power supply Main power supply: 0.5 A or less specifications Current consumption Signal power supply: 0.05 A or less Protection Polarity protection Valve driving actuator Linear motor...

  • Page 12: Functional Characteristics

    6-3. Functional characteristics (1) Analog input (flow rate command signal) Flow rate command signal range Set controlled Set controlled Input type flow rate flow rate 0 L/min: A Minimum Maximum value: B value: C Voltage input 1.04 V Current input 4 mA 4.16 mA 20 mA...

  • Page 13: In Side Straight Pipe Length And Accuracy (Reference Value)

    (4) IN side straight pipe length and accuracy (reference value) - The smaller the piping size, the more the built-in flow sensor is susceptible to the length of straight pipe. - The lower the flow rate, the less the product is susceptible to the length of straight pipe. - To maintain the specified +/-3% F.S.

  • Page 14: Dimensions

    7. Dimensions PFCQ531-04 , Thread depth 5 - 13 -...
  • Page 15 PFCQ531-04 with bracket PFCQP-910S-31 Protective plug - 14 -...

  • Page 16: Component Drawing Of Parts In Contact With Fluid And Parts Names

    8. Component Drawing of Parts in Contact with Fluid and Parts Names Components Name Material Remarks Name Material Remarks Attachment Stainless steel Tube Stainless steel O-ring Motor body Resin O-ring Stainless steel Spacer Resin Wear ring Stainless steel Rare earth Mesh Stainless steel Magnet...

  • Page 17: Working Principle

    9. Working Principle This product has a built-in linear motor which changes the valve opening by moving the valve element mounted to the linear motor, and thereby adjusting the flow rate inside the valve. When the flow rate command signal is input to the product, the internal operation circuit performs a comparison calculation with the flow rate measured by the flow sensor.

  • Page 18: Installation

    10. Installation 10-1. Installation Mounting the bracket - Mount the bracket using hexagon socket head cap screws (4 pcs.). - Apply a tightening torque of 1.4 to 1.6 N.m. Mounting screws (accessories) - To mount the product with a bracket, use M4 screws or equivalent (4 pcs.). - The screws should be prepared by the user.
  • Page 19 Direct mounting - Use M4 screws or equivalent (4 pcs.) for mounting. - The screws should be prepared by the user. - See “7. Dimensions” for the threaded hole locations and depth. M4 screws or equivalent (To be prepared by the user) Mounting location - Give consideration to the size of the control panel and the installation method so that the surrounding of the product will be 45...

  • Page 20: Air Supply

    10-2. Air supply - Use fluid that is compliant with JIS B 8392-1 1.1.2 to 1.6.2, ISO8573-1 1.1.2 to 1.6.2. Using the following pneumatic circuit satisfies the air quality class described above. Example of a recommended pneumatic circuit (for compressed air) Dryer Air filter Regulator...

  • Page 21: Piping

    10-3. Piping - Mount the product so that the fluid flows in the direction indicated on the label on the side of the product. Direction of the fluid Label (Example) - Do not mount the product in an orientation with the product bottom surface facing upward (upside down).
  • Page 22 - Apply the correct tightening torque when mounting the product. Refer to the following table for the required torque. - Use a wrench suitable for the required torque. Do not use a wrench with an overall length of 400 mm or longer. - If the screw is tightened at a torque exceeding the tightening torque range, the product may be damaged.

  • Page 23: Electrical Connection

    10-4. Electrical Connection - Be sure to turn off the power before performing wiring. - Use individual wiring routes. Using the same wiring route as a power line or high voltage line may cause malfunction due to noise. - When using a switching power supply, be sure to ground the frame ground (FG) terminal. Also, insert a noise filter, such as a line noise filter and a ferrite, between the product and the switching power supply.

  • Page 24: Example Of D-Sub Connector Wiring

    (2) Example of D-sub connector wiring - NPN output specifications D-sub number connector DC1(+) Main power supply DC24V DC1(-) DC2(+) Signal power supply DC24V Main DC2(-) circuit 5 kΩ internal Load resistance OUT1 Note: Max. output current: 10 mA Analog input Internal resistance Voltage or current OUTA...
  • Page 25 Caution Be sure to prepare the main power supply and the signal power supply separately. If one power supply is shared between them, malfunction due to noise may be caused or the specified characteristics may not be satisfied. Do not short-circuit the main power supply 0 VDC (DC1(-)) and INA and OUTA 0 VDC (COM).

  • Page 26: Flow Rate Display Connector Terminal No

    (3) Flow rate display connector terminal No. The dedicated output for the optional digital flow monitor PFG310-XY-M-Y-X105. When using the digital flow monitor, connect the digital flow monitor PFG310-XY-M-Y-X105 using the optional lead wire with connector (part number ZS-33-D) and the sensor connector (part number ZS-28-C-1). When not connecting the digital flow monitor, mount the protective plug (accessory).

  • Page 27: Operation

    11. Operation 11-1. Types of operation This product can perform the following operations: (1) Analog input operation: The flow rate is controlled according to the analog input INA (flow rate command signal). (2) Valve closed: When the analog input (flow rate command signal) is smaller than 1.04 V (4.16 mA), current to the linear motor is turned off and the valve is closed.

  • Page 28: Analog Input Operation

    11-2. Analog input operation When the analog voltage (or current) is input in the following procedure, the product controls the flow rate according to the flow rate command signal. User’s operation Operation of the product Stop the supply of the fluid to the IN side Turn off switch input IN1 Set analog input INA to 0 VDC (0 mA) Apply 24 VDC to signal power supply DC2...
  • Page 29 —Timing chart— Analog input operation Power supply Turn on DC2 within 0.5 seconds of turning on DC1. Turns on the power supply and warms up for at least 10 min, and then supplies compressed fluid to the IN side. IN side pressure 0MPa Input signal...
  • Page 30 Caution Do not apply a voltage or current outside of the specification range . Failing to do so may cause a product failure. Turn on the signal power supply without supplying compressed fluid to the IN side, and then turn on the main power supply. Allow the product to warm up for at least 10 minutes after the power supply is turned on.

  • Page 31: Valve Fully Open Operation

    11-3. Valve fully open operation When the switch input IN1 is input in the following procedure, the valve is fully opened. When the valve is closed, if the switch input IN1 is turned on, the valve is fully opened or the valve is closed if the switch input IN1 is turned off.
  • Page 32 —Timing chart— Valve fully open operation Power supply Turn on DC2 within 0.5 seconds of turning on DC1. Turns on the power supply and warms up for at least 10 min, and then supplies compressed fluid to the IN side. IN side pressure 0MPa...

  • Page 33: Options

    12. Options 12-1. Power supply cables PFCQ531-H1-3 Specifications Items Description D-sub connector, 9-pin socket Connector #4-40 UNC screws Sheath outside diameter Φ6.8 mm Minimum bending radius 54 mm Number of cores 10 cores (5 x 2P) Nominal cross section of Equivalent to AWG26 the conductor Insulator outside diameter...

  • Page 34: Brackets

    12-2. Brackets PFCQ531-B1 Items Description Material Stainless steel Weight 30 g Screws for M4 (4 pcs.) mounting the body Screws for fixing Equivalent to M4 the mounting (4 pcs.) frame 1: Provided with the bracket. 2: To be prepared by the customer. For the dimensions after mounting the bracket, refer to “7.

  • Page 35: Digital Flow Monitor

    12-3. Digital flow monitor Digital flow monitor: PFG310-XY-M-Y-X105 Specifications Model PFG310-XY-M-Y-X105 Model PFCQ531 Applicable SMC flow controller Rated flow rate range 3 to 300 L/min Instantaneous flow -15 to 315 L/min Set flow rate range Accumulated flow 0 to 999,999,999,999 L Smallest Instantaneous flow 1 L/min...
  • Page 36 1: The rated flow rate range of the applicable flow controller. 2: When using the accumulated value hold, calculate the product life based on the operating conditions and use the product within the life period. The maximum access limit of the memory device (electronic component) is 1.5 million cycles.
  • Page 37 Warning Do not connect the power and output lead wire and connector. When connecting to the flow controller for air, do not connect the wiring to the power supply and output connectors. Failing to do so may deteriorate the accuracy or cause a vibration.

  • Page 38: Separately Sold Products

    13. Separately Sold Products 13-1. Digital flow monitor mounting bracket If a mounting bracket is required for the digital flow monitor, order it separately. Bracket A: ZS-46-A1 dimensions Note: The bracket can be mounted in four directions. Note: Self tapping screw: 3 x 8L nominal diameter (2 pcs.) Bracket B: ZS-46-A2 dimensions Note: The bracket can be mounted in four directions.
  • Page 39 Panel mount adapter: ZS-46-B Dimentions0.5-7 Panel mount adapter + Front protective cover: ZS-46-D Dimentions0.5-7 - 38 -...

  • Page 40: Maintenance

    14. Maintenance 14-1. Maintenance and inspection Check the following points and contact SMC sales representative if you find any abnormality. (1) Daily inspection - Lighting up and flashing of LEDs (If an abnormality is found in the lighting up and flashing of an LED, refer to “14-3.

  • Page 41: Troubleshooting

    14-2. Troubleshooting In the event of malfunction, check the following corresponding condition of each problem. If none of the causes corresponding to the condition of the problem can be found and normal conditions are restored by replacing the product, it can be assumed that the product itself is defective.

  • Page 42: Flow Rate Control Problems

    (2) Flow rate control problems Condition Possible causes of Investigation method and location of Countermeasures of problem problem possible causes If the specified voltage is not input to No air the power supply, the power supply - Check to see if the power supply LED flows.
  • Page 43 Condition Possible causes of Investigation method and location of Countermeasures of problem problem possible causes If the specified voltage is not input to the power supply, the flow rate No air command signal will not be input to the flows. Signal power - Check the voltage of the signal power internal CPU due to insufficient voltage.
  • Page 44 Condition Possible causes of Investigation method and location of Countermeasures of problem problem possible causes The error becomes greater if the There is a operational differential pressure or the large error supply flow rate is insufficient. Apply between sufficient pressure to the piping port (IN the flow rate Insufficient supply - Check the pressure at the IN and OUT...
  • Page 45 Condition Possible causes of Investigation method and location of Countermeasures of problem problem possible causes Due to a pressure regulator mounted to the piping port (IN side), the pressure on the IN side may drop if a high flow The flow Pressure fluctuation - Is the pressure on the IN side rate is applied suddenly.

  • Page 46: Output Signal Problems

    (3) Output signal problems Condition Possible causes of Investigation method and location of Countermeasures of problem problem possible causes - Are the input specifications of an An analog Use an external device whose external device connected to the output specifications match those of the Signal mismatch analog output consistent with the signal is...

  • Page 47: Flow Rate Display Problem

    (4) Flow rate display problem Condition Possible causes of Investigation method and location of Countermeasures of problem problem possible causes The digital flow Connect the wiring correctly by - Is the wiring connected correctly? monitor referring to “10-4. (4) Wiring between Wiring defect - Is there any broken or short-circuited does not...

  • Page 48: Led Indication And Error Measures

    14-3. LED indication and error measures Based on the LED colour, turning ON and flashing of the power supply LED and the error LED at the top of the product, the product status can be confirmed. －Normal operation－ Name Power supply Error LED Description Measures...
  • Page 49 －Error generation－ Name Power Error LED Description Measures supply LED Reset the signal. Alternatively, turn on the Switch input is ON at the end of main power supply again the analog input operation. Switch input when the analog input is error ⇒Turns off current to the linear set to 1 VDC (4 mA) or...
  • Page 50 －Error reset－ If an error occurs, the product turns off current to the motor and closes the valve. After taking measures described in “Measures” reset the error following the method below. (1) Reset the signal Turn off the analog input INA and the switch input IN1 for at least 1 sec. (2) Turn on the main power supply again Turn off the main power supply (for at least 1 sec) and turn it on again.

  • Page 51: Handling Precautions

    15. Handling Precautions 15-1. Design and selection precautions Warning (1) Be sure to read the Operation Manual. Do not handle the product in a way not described in the Operation Manual or use it outside the specifications because doing so may lead to damage or malfunction of the product. No damage attributable to the handling of the product in a way not described in the Operation Manual or to use of the product outside the specifications will be compensated.

  • Page 52: Handling Precautions

    be insufficient or the product may malfunction or may not satisfy the specifications. (5) If the fluid on the IN side (inlet) of the product is turbulent, accurate measurement may not be possible. If a valve, etc. is used on the IN side (inlet) of the product, flow turbulence may be caused due to changes in the effective area, resulting in an error in the flow rate measurement.
  • Page 53 getting burned. (2) Do not perform operations or configure settings with wet hands. This may cause an electric shock. (3) Do not use a damaged product or a product with missing parts. Failing to do so may cause an electric shock, fire, or injury. (4) Perform mounting, piping, wiring, or inspection work after checking the voltage using a tester, etc.

  • Page 54: Mounting

    Outside of the controllable range, the flow rate may be low, flow rate control may be unstable, the product temperature may be high and so on. (7) Make sure that the pressure on the IN (inlet) and OUT (outlet) sides will not fluctuate. If the pressure on the IN side or the OUT side varies, the flow rate may vary.

  • Page 55: Power Supply

    (9) If there is a risk of foreign matter entering the fluid, install a filter or mist separator on the IN side (inlet). Failing to do so may cause failure or malfunction. In addition, accurate measurement and control may no longer be available. (10) Do not mount a lubricator on the IN side (inlet) of the product.

  • Page 56: Grounding

    If a power supply with inrush current prevention specification is used, a voltage drop may occur during flow rate control. (3) Take measures against lightning surges. Isolate the grounding of the surge absorber for lightning from the grounding of the product and its peripheral devices. 15-5.
  • Page 57 noise and surge from entering the signal line from power lines or high voltage cables. (5) Check the wiring before using the product. Miswiring will lead to product damage or malfunction. Make sure that there is no miswiring before starting operation. (6) Do not pull the cables or lead wires with excessive force.

  • Page 58: Operating Environment

    15-7. Operating environment Warning (1) Do not use the product in an atmosphere where flammable gas, and explosive or corrosive gas are present. Failing to do so may lead to fire, explosion, and corrosion. (2) Do not use the product in a place where dust, water, chemicals, or oil scatter or in a oil vapor atmosphere.

  • Page 59: Maintenance

    Installation of an air dryer for removing drainage and water is recommended. Also avoid abrupt temperature changes even within the specified temperature range. (10) When mounting the products arranged close to each other, the product temperature may rise, causing failure or malfunction. Mount the products providing a space of at least 20 mm between each other.
  • Page 60 In case of any abnormalities, such as a device or equipment not operating normally, stop the operation. Otherwise, safety may not be ensured due to an unexpected malfunction of such a device or equipment. - 59 -...
  • Page 61 Revision history 4-14-1, Sotokanda, Chiyoda-ku, Tokyo 101-0021 JAPAN Tel: + 81 3 5207 8249 Fax: +81 3 5298 5362 https://www.smcworld.com Note: Specifications are subject to change without prior notice and any obligation on the part of the manufacturer. © 2023 SMC Corporation All Rights Reserved...

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