SMC Networks VFR4000 Series Operation Manual Download Page 6

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VFR4000-OMH0003-D 

 

Design / Selection 

 

 

3.Solenoid valve drive for AC with a solid state output 

(SSR, TRIAC output, etc.)

 

1) Current leakage 

When using a snubber circuit (C-R element) for surge 

protection of the output, a very small amount of electrical 

current will continue to flow even during the OFF state.   

This results in the valve not returning. In a situation where the 

tolerance is exceeded, as in the above case, take measures to 

install a bleeder resistor. 

2) Minimum allowable load amount (Min. load current) 

When the consumption current of a valve is less than the 
output’s minimum allowable load volume or the margin is small, 

the output may not switch normally. Please contact SMC. 

4.Surge voltage suppressor 

1) The surge voltage suppressor built into the valve is intended to 

protect the output contacts so that the surge generated inside 

valve does not adversely affect the output contacts. Therefore, if 

an overvoltage or overcurrent is received from an external 

peripheral device, the surge voltage protection element inside 

the valve is overloaded, causing the element to break. In the 

worst case, the breakage causes the electric circuit to enter 

short-circuit status. If energizing continues while in this state, a 

large current flows. This may cause secondary damage to the 

output circuit, external peripheral device, or valve, and may also 

cause a fire. So, take appropriate protective measures, such as 

the installation of an overcurrent protection circuit in the power 

supply or a drive circuit to maintain a sufficient level of safety. 

2) If a surge protection circuit contains nonstandard diodes, such 

as Zener diodes or varistor, a residual voltage that is in   

proportion to the protective circuit and the rated voltage will 

remain. Therefore, take into consideration the surge voltage 

protection of the controller. In the case of diodes, the residual 

voltage is approximately 1V.

   

5. Operation in low temperature conditions

 

It is possible to operate a valve in extreme temperatures, as low 

as 

–10°C. Take appropriate measures to avoid the freezing of 

drainage, moisture, etc., in low temperatures.

 

6. Operation for air blowing 

When using a solenoid valve for air blowing, use an external 

pilot type. Use caution because the pressure drop caused by 

the air blowing can have an effect on the internal pilot type 

valve when internal pilot type valves and external pilot type 

valves are used on the same manifold. Additionally, when 

compressed air within the pressure range of the established 
specifications is supplied to the external pilot type valve’s port, 

and a double solenoid valve is used for air blowing, the 

solenoids should be energized when air is being blown.

 

 

 

 

 

 

 

 

 

7. Mounting orientation 

Mounting orientation is free.

   

8. Initial lubrication of main valve 

The following initial lubricant has already been applied to the 

main valve. 

Rubber seal, spool valve: Grease 

Please consult with SMC, as there are some standard valve 

products that use fluorine grease for food processing 

equipment (NSF H-1). 

9. For the pilot EXH (PE) port 

If the solenoid valve and the manifold’s pilot EXH (PE) port is 

restricted extremely or blocked, abnormal operation of the 

solenoid valve may occur. 

Mounting 

 

 

 

1. Operation manual 

Install the products and operate them only after reading the 

operation manual carefully and understanding its contents. Also, 

keep the manual where it can be referred to as necessary. 

2. Ensure sufficient space for maintenance activities. 

When installing the products, allow access for maintenance. 

3. Tighten threads with the proper tightening torque. 

When installing the products, follow the listed torque 

specifications.

   

4. If air leakage increases or equipment does not 

operate properly, stop operation. 

Check mounting conditions when air and power supplies are 

connected. Initial function and leakage tests should be 

performed after installation. 

5. Painting and coating 

Warnings or specifications printed or affixed to the product 

should not be erased, removed or covered up. 

Please consult with SMC before applying paint to resinous 

parts, as this may have an adverse effect due to the solvent in 

the paint.

 

Piping 

 

 

1. Refer to the Fittings and Tubing Precautions (Best 

Pneumatics No.7) for handling One-touch fittings. 

2. Preparation before piping 

Before piping is connected, it should be thoroughly blown out 

with air (flushing) or washed to remove chips, cutting oil and 

other debris from inside the pipe.   

3. Winding of sealant tape 

When screwing piping or fittings into ports, ensure that chips 

from the pipe threads or sealing    material do not enter the 

piping.Also, if sealant tape is used, leave 1 thread ridge 

exposed at the end of the threads.   

4. Using closed center 

For closed center,   

check the piping to prevent   

air leakage from the piping   

between the valve and the cylinder. 

 

Caution 

Warning 

VFR4000 Series 

5 Port Solenoid Valve / Precautions 2

 

 

 

Be sure to read before handling.

 

 

Caution 

   

Summary of Contents for VFR4000 Series

Page 1: ...Doc No VFR4000 OMH0003 D PRODUCT NAME 5 Port Solenoid Valve MODEL Series VFR4000 Series...

Page 2: ...nstructions 2 3 Precautions on Design Selection 4 5 Mounting 5 Piping 5 6 Wiring 6 Lubrication 6 Air Supply 6 Operating Environment 7 Maintenance 7 Specific Product Precautions 8 to 11 Construction 12...

Page 3: ...quipment failure when configuring the equipment 2 Only personnel with appropriate training should operate machinery and equipment The product specified here may become unsafe if handled incorrectly Th...

Page 4: ...ailure of the product 3 Prior to using SMC products please read and understand the warranty terms and disclaimers noted in the specified catalog for the particular products 2 Vacuum pads are excluded...

Page 5: ...constant supply of vacuum Failure to do so may result in foreign matter sticking to the adsorption pad or air leakage causing the workpiece to drop 9 Ventilation Provide ventilation when using a valv...

Page 6: ...valves and external pilot type valves are used on the same manifold Additionally when compressed air within the pressure range of the established specifications is supplied to the external pilot type...

Page 7: ...ide the pilot valve causing malfunction or response delay So do not apply a large amount of oil When a large amount of oil needs to be applied use an external pilot type to put the supply air on the p...

Page 8: ...irst confirm that measures are in place to prevent workpieces from dropping run away equipment etc Then cut off the supply pressure and electric power and exhaust all compressed air from the system us...

Page 9: ...2 3 to 2 8 mm Type D Y 4 5 to 7 mm Applicable crimp terminal Type E T 1 25 3 1 25 3S 1 25Y 3N 1 25Y 3S Round shape or Y shape crimp terminal cannot be used for Type D DIN terminal block type VFR4 10...

Page 10: ...exhaust port leaving open How to Exchange Solenoid Valves Pilot Valve Assemblies How to exchange solenoid valves Loosen set screw and take solenoid valve out vertically otherwise it may cause damage...

Page 11: ...annot be used for intermediate stops of a cylinder because there is leakage from relief port on the regulator Type 01T with Terminal Block Remove junction cover of manifold exposing terminal block att...

Page 12: ...and COM Note 3 Station numbers are started from D side although connector is mounted on D or U Side Type 01F D sub Connector MIL standard type D connector Terminal 25 pins has wide exchangeability an...

Page 13: ...12 VFR4000 OMH0003 D VFR4000 Series Construction Be sure to read this before handling...

Page 14: ...13 VFR4000 OMH0003 D VFR4000 Series Construction Be sure to read this before handling...

Page 15: ...ly shifted 1 2 3 4 6 Coil splashed by water Low pilot pressure Intrusion of foreign matter Poor contact at contactor wire or connection part Low line voltage Higher voltage or wrong coil used Burnt co...

Page 16: ...n this case stop usig the valve immediately 15 Supply specified pressure to X port Single solenoid 3 position 0 2 to 0 9 MPa Double solenoid 0 1 to 0 9 MPa When a large quantity of drain is given and...

Page 17: ...1 Sotokanda Chiyoda ku Tokyo 101 0021 JAPAN Tel 81 3 5207 8249 Fax 81 3 5298 5362 URL https www smcworld com Note Specifications are subject to change without prior notice and any obligation on the p...

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