196
Voltage
Electric current
about 20msec
Electric current and voltage waveform at valve excitation
at start-up
(power consumption: 2.2W)
at retention
(power consumption: 0.6W)
VacuumGenerator
VN
&ExternalVacuumController
VNP
Series
Before using the PISCO device, be sure to read the "Safety Instructions", "Common Safety Instructions for Products Listed in This Manual" on page 13 to 15 and "Common Safety Instructions for
Vacuum" on page 136.
DetailedSafetyInstructions
Warnings
Cautions
[Products Handling]
1. Do not step onto or place objects on the devices. These may cause falling accident, fall of devices, injuries from falling and malfunctions from device breakage.
2. Do not wash or paint the devises with solvent. Solvent or water use may cause breakage of resin parts and malfunction by port clogs.
[Products maintenance]
1. Carry out maintenance and checks of equipment only after turning power off, shutting air off and making certain that the residual pressure in the piping has dropped to zero.
2. When installing wiring and piping, be sure to switch off the power and make sure there is no miswiring and mispiping before applying power and air.
3. In tightening the screw, use the recommended tightening torque. The recommended tightening torque for installation of VN & VNP is 0.3 ~ 0.35N·m (0.22 ~ 0.26lbf·ft) for M3
thread, and for installation of pilot solenoid valve is 0.15 ~ 0.2N·m (0.11 ~ 0.15lbf·ft). Use of a torque other than the recommended level may cause air leakage, dropout or
breakage of the products.
[Products application]
1. For the operation of the solenoid valve, make certain that the leakage current is less than 1mA. Leakage current larger than that may cause malfunction.
2. Avoid applying excessive vibration or shocks to the devises. It may damage devises and lead to malfunction of solenoid valve.
3. Coil of pilot solenoid valve generates heat with the following ① to ③ conditions. It may lead to shorten the product life or operational malfunction by heat. Additionally, it may
cause burns on worker or inuence a peripheral device adversely. In such cases, please consult with Pisco.
① long continuous energization about 2 or more hours
② high cycle operation
③ When, even as for the intermittent energization, the total energization time is longer than the total of non-energization time within a day.
4. Long continuous power supply to the valve may raise the temperature of the coil. Heat may cause burns or affect the surrounding equipment adversely. Consult PISCO about
such applications.
5. Current limit circuit is adopted for the solenoid valve. It features the current drop when the coil is energized and retains current. Therefore, the use in the location having
vibration or shock greater than the specication must be avoided. It may cause valve malfunction.
[Products Handling]
1. Do not pull or bend lead wires of solenoid valve or vacuum switch excessively. Doing so may result in lead wires or connector components broken.
2. Compressed air contains plenty of drain (Water, oxidized oil, tar and foreign particles etc.). Since drain may cause performance drop, conduct air dehumidication by the after
cooler and drier, then improve of air quality.
3. Never supply lubricated air.
4. Rust and inow of foreign particles in piping cause malfunction and performance drop. Therefore, install a lter (ltration capacity: max. 5µm) just before the air supply port.
On top of it, Prior-to-use and periodic ushing is recommended.
5. Do not use the devises in the atmosphere of corrosive and ammable gas. In addition, do not use the gas as uid admitted. Since this product is not explosion-proof type, it
may cause re and explosion.
6. Do not use the devises in locations where they can be exposed to water drops, oil drops, dust, etc. Since this product is not drip or dust proof type, they may cause breakage
or performance drop.
7. The lead wire of solenoid valve is polarized. Therefore, the solenoid valve is not activated by wrong polarity.
[Products maintenance]
1. When replacing cartridge ttings for air supply (PS, PV) or vacuum (V) port, be sure to remove extraneous matter from the seal and x the fastening pin rmly in place.
2. The performance of silencer tted ejector unit and lter tted external vacuum controller may deteriorate due to dust trapped in the elements. Therefore, we recommend
cleaning well or replacing the elements freguently at just the right time.
[Products application]
1. In selecting the piping to the vacuum (V) port, save piping bore and length for enough effective sectional area. Insufcient effective sectional area may cause performance
drop in characteristics such as suction ow and blow-off airow.
2. In selecting the piping to the supply (PS, PV) port, save piping bore and length for enough effective sectional area. Insufcient effective sectional area may cause performance
drop due to short supply of compressed air and vacuum ow.
3. This product is not equipped with a vacuum lter. Therefore, use PISCO vacuum lter at the same time. If the lter is not used, dust or other particles are accumulated inside
the product and cause vacuum performance drop (vacuum generator) and solenoid valve malfunction such as air leakage. (vacuum generator and external vacuum controller)
(Recommended lter: VFU series and VFJ series)
4. As the series number of manifolds increases, there is limitation on the simultaneous activation-allowable series depends on the condition of the air supply (supply port size,
piping length, regulator processing ow rate and etc.) and/or air consumption (vacuum characteristics) of ejector and other such problems may possibly be encountered.
Consult PISCO sales ofce on this matter.
5. Although Vacuum Generator VN series manifold type is the open to air exhaust by individual unit, the exhaust air from a vacuum-generating unit or blow-off air may be
exhausted to the vacuum port of other non-activating units. If this is a matter, please consult PISCO sales ofce.
2011vacuum-4 11.8.4,3:39PM196
