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FOR AIR
Digital Flow Switch
Large Flow Rate Type
Instruction Manual
PF2A7 H Series
URL http://www.smcworld.com
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CONTENTS Thank you for purchasing the SMC PF2A7 H Series Digital Flow Switch. Please read this manual carefully before operating digital flow SAFETY 2 switch and understand digital flow switch, its capabilities and limi- tations. Please keep this manual handy for future reference. Model Indication Method 4 Name and Functions of Individual Parts 5 Installation 6 Example of Internal Circuit and Wiring 8 Setting 10 OUT1 Output Specifications 11 Function Setting 13 Other Functions 18 OPERATOR Specif
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SAFETY The Digital Flow Switch and this manual contain essential information NOTE for the protection of users and others from possible injury and Follow the instructions given below when handling your flow property damage and to ensure correct handling. switch. Otherwise, the switch may be damaged or may fail, thereby Please check that you fully understand the definition of the following resulting in malfunction. messages (signs) before going on to read the text, and always follow Do not drop it
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Model Indication Method Names and Functions of Individual Parts Display Part PF2A7 H Output(OUT1)Lamp : Lit when OUT1 is ON. Unit Specification Flickers when an overcurrent error occurs. No Symbol: Unit selection function provided Flow display : Instantaneous flow, integrated flow and set value are -M: SI units fixed displayed. Lead Wire Specification Flow check display : Flickering interval varies depending on the flow. No Symbol: Lead wire with connector 3m Unit display : Selected unit is
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Installation Before you mount a flow switch, read "SAFETY" and "Installation" Piping connections described in this chapter carefully to obtain safe and correct Observe the specified tightening torque when connecting pipes. measurement. Refer to the following table for the appropriate torque values. Mounting Appropriate tightening torque Use this flow switch under the specified operating pressure Nominal size of screws (N m) range. Rc 1 36 to 38 Use this flow switch under the specified operating
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Example of Internal Circuit and Wiring Output Specification PF2A7 H- -28/68 5 20 Output 1 to 5V When the Lead wire with connector provided by SMC corporation is used the color of wire (Brown, white, Black, Blue) shown on PF2A7 H- -29/69 circuit diagram will be applied. Output 4 to 20mA 28, 29 1 4 NPN open collector 1 output + Analog output Max. 30V,80mA Internal voltage drop : 1V or less Min. measured flow Max. measured flow Instantaneous flow [ min ] / Brown 1 Max. measured flow Min. measu
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Setting OUT1 Output Specifications Setting Procedure:Check installation condition and wiring Instantaneous switch output (oU1_0) and set as below See "Flow rate setting mode" to input setting value. Pressing button at each Normal Hysteresis mode mode of F_0 to F_7, returns to mode previous mode, pressing ON Yes button moves a mode ahead. MODE Instantaneous ▼ OFF SET flow note2) n_2 n_1 1. Initial setting mode n MODE Window comparator mode n_1 n_2 SET 2. Display selecting mode H H ON MODE Instant
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OUT1 Output Specifications (continue) Function Setting Integration switch output (oU1_1) 1. Initial setting mode See "Flow rate setting mode" to input setting value. note2) Initial setting Note 1) ON n Display mode(Instantaneous flow/Integrated flow), OFF Integrated display unit and output specification are set. n_3 flow Output mode ON Flow rate setting Note 2) OFF Integrated Input the flow set value to start switch output. P P_3 flow Integration Pulse output(oU1_2) Output mode selecting not
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Function Setting (continue) 2. Display selecting mode 5. Output method selecting mode Select the display from instantaneous flow or Set OUT1 output mode. Reverse output and integrated flow. Press button to select desired flow, then non-reverse output mode are available for output. press button. Press button to select the mode from reverse output or d_1 means instantaneous flow, d_2 integrated flow. non-reverse output. And press button is to set. oU1_n indicates reverse output mode, oU1_P is
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Function Setting (continue) 7. Flow rate setting mode Integration switch output (oU1_1) 3 3 3 Input set value. Input method depends on OUT1 output specification. The value can be set up to 9999[m 10 ], 999[m ], 999[ ]. It does not go into Flow rate setting mode when the integration pulse 1. Press button to input the set value in the digit of [ ]. output is selected as OUT1. The set value and P_3(or n_3) appears in turn, L an "OUT" and "L" flicker. OUT Instantaneous switch output (oU1_0) Press
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Other Functions Flow display check Initialize the Set Value All the setting can be initialized to values at shipment. Check integrated flow when instantaneous flow is selected Press button and button for longer than 2 sec. during initial Integrated flow is displayed only during button is pressed. setting mode F_0 . Press button after F_00 appears. (Returns to instantaneous flow when releasing button.) Setting is not initialized but switched to F_0 if pressing 3 The unit of integrated flow is c
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Specification Model PF2A703H PF2A706H PF2A712H Model PF2A703H PF2A706H PF2A712H Flow Rate Indication/Ra Dry air [NPN open collector] Max. load current : 80mA, Internal voltage drop : 1V or less (At load current Flow rate indication range 125 to 3025 250 to 6050 550 to 12050 80mA), Max. input voltage : 30VA ( /min) Switch output Set flow rate range [PNP open collector] Max. load current : 80mA, 125 to 3025 250 to 6050 550 to 12050 ( /min) Internal voltage drop : 1.5V or less (At load current 80mA
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Full View with Dimensions (in mm) D B E FLOW SWITCH 60 C 2-G (42.2) Flow direction 4-I Thred depth J 40 Thred G PF2A703H Rc1, NPT1, G1 PF2A706H Rc1 1/2, NPT1 1/2, G1 1/2 PF2A712H Rc2, NPT2, G2 Model No. A B C D E F H I J PF2A703H 55 160 40 92 67 55 36 8 M5 0.8 PF2A706H 65 180 45 104 79 65 46 M6 1 9 PF2A712H 75 220 55 114 89 75 56 M6 1 9 22 H F A 55
