1 stage performance 2 stage performance Multistage Ejector Series ZL112/212 Series ZL112/212 Energy saving, large flow rate, 3 stage diffuser construction Suction flow rate Maximum increased 250% and air Air consumption suction flow rate l/min (ANR) l/min (ANR) consumption reduced Q1 Q2 Q3 20% with 3 stage diffuser ZL112 Q1 Q2 Q3 100 63 construction 3 stage ZL212 200 126 performance (Versus ş1.3, one stage model) Suction 250 % suction flow flow rate rate increase NEW NEW Series ZL212 Diffusers stacked and integrated Compact size and large flow rate (twice the flow rate of the ZL112) Series ZL112 valve option now available (ZL112 only) Release valve Release flow rate Supply valve adjustment needle Exhaust port options One-touch fitting feature Built-in silencer Makes piping work easy (ZL112 only) Vacuum pressure sensor With digital vacuum pressure switch SMC PRESSURE SWITCH SMC PRESSURE SWITCH SMC PRESSURE SWITCH Port exhaust UNIT RESET RESET RESET SET SET SET LCD display/ZSE4 LCD display with LED display/ZSE4E back light/ZSE4B With vacuum With vacuum adapter pressure gauge � Series variations Vacuum pressure sensor options Exhaust port With valve Digital vacuum pressure switch Vacuum Maximum Air Vacuum Series suction flow rate consumption With pressure With Built-in Port supply valve/ adapter ZSE4E ZSE4B ZSE4 l/min (ANR) l/min (ANR) gauge silencer exhaust supply valve release valve ZL112 100 63 ZL212 200 126 Features Vacuum pressure Multistage Ejector Series ZL112 How to Order Without valve ZL1 12 With valve ZL1 12 K1 5M Z E 25 Lead wire length Nozzle diameter ş1.2mm 0.5m 12 Nil L 2.9m Exhaust specifications Digital vacuum pressure switch specifications Nil Built-in silencer Port exhaust P For E (ZSE4) EB (ZSE4B) 25 NPN output Lead wire length 0.5 (2.9)m Lead wire length 0.5 (2.9)m 26 Analog output Exhaust port thread specification Lead wire length 0.5 (2.9)m 65 PNP output (port exhaust only) For EE (ZSE4E) 27 NPN output Lead wire length 0.5 (2.9)m Rc1/2 Nil 26 Analog output Lead wire length 0.5 (2.9)m G1/2 F 67 PNP output Lead wire length 0.5 (2.9)m N 1/2-14NPT ∗ Not required for nil, vacuum adapter (GN) and T 1/2-14NPTF vacuum pressure gauge (G). Supply valve/Release valve combination Vacuum pressure sensor With supply and release valves K1 Nil None With supply valve K2 GN Vacuum adapter Rc1/8 G With vacuum pressure gauge E With digital vacuum pressure switch ZSE4 Rated voltage EB With digital vacuum pressure switch ZSE4B DC specifications EE With digital vacuum pressure switch ZSE4E 5 24VDC 6 12VDC V 6VDC Manual override S 5VDC Nil Non-locking push type R 3VDC D Slotted locking type AC specifications (50/60Hz) 1 100VAC 2 200VAC Light/Surge voltage suppressor 3 110VAC [115V] Without light/surge voltage suppressor Nil 4 220VAC [230V] With surge voltage suppressor S With light/surge voltage suppressor Z With light/surge voltage suppressor (non-polar type) U Electrical entry Note 1) Type U is 24 or 12VDC only. G Lead wire length 0.3m Grommet Note 2) Since surge voltage is prevented by a rectifier in H Lead wire length 0.6m the case of AC, there is no "S" type. L Lead wire length 0.3m L type plug LN Without lead wires connector LO Without connector Lead wire length 0.3m M M type plug Without lead wires MN connector Without connector MO 1 Series ZL Ejector Specifications Standard ZL112 Model Nozzle diameter ş1.2mm Maximum suction flow rate 100l/min (ANR) Air consumption 63l/min (ANR) Maximum vacuum pressure –84kPa Maximum operating pressure 0.7MPa Supply pressure range 0.2 to 0.5MPa Standard supply pressure 0.4MPa Operating temperature range 5 to 50°C With valve Supply/Release Valve Specifications Part Number SYJ514-��� Type of valve actuation N.C. Fluid Air 0.2 to 0.5MPa Operating pressure range Internal pilot type Ambient and fluid temperature 5 to 50°C Note 1) Response time (for 0.5MPa) 25ms or less Maximum operating frequency 5Hz Manual operation Non-locking push type, Slotted locking type With vacuum pressure gauge Pilot valve individual exhaust type, Pilot exhaust type Main valve/Pilot valve common exhaust Lubrication Not required Mounting position Unrestricted Note 2) Impact/Vibration resistance 150/30m/s² Enclosure Dust proof Note 1) Based on JIS B8374-1981 dynamic performance test. (coil temperature 20°C, at rated voltage, without surge voltage suppressor) Note 2) Impact resistance: No malfunction when tested with a drop tester in the axial direction and at a right angle to the main valve and armature, one time each in both energized and deenergized states. (initial value) Vibration resistance: No malfunction when tested with one sweep of 8.3 to 2000Hz in the axial direction and at a right angle to the main valve and armature, one time each in both energized and Adapter deenergized states. (initial value) Note 3) Refer to CAT.E143-B "SYJ300/500/700" for details on valves. Option Specifications Vacuum pressure gauge specifications Part number GZ30S Fluid Air Pressure range –100 to 100kPa Scale range (angular) 230° Accuracy ± 3% F.S. (full span) Class Class 3 Port exhaust Operating temperature range 0 to 50°C Material Housing: Polycarbonate/ABS resin Symbol Standard P V 2 Multistage Ejector Series ZL Option Specifications Digital vacuum pressure switch specifications With digital vacuum pressure switch Part number ZSE4-00-��-X105 ZSE4B-00-��-X105 ZSE4E-00-��-X105 (ZSE4) Display LCD LCD with back light LED –101 to 10KPa {–760 to 75mmHg} Pressure setting range Maximum operating pressure 200KPa Operation indicator light OUT1: Green Green (lights up when ON) OUT2: Red Response frequency 200Hz (5ms) Hysteresis mode Variable (3 digits or more) Variable (can be set from 0) Hysteresis Window comparator mode Fixed (3 digits) Fluid Air, Non-corrosive gas Temperature characteristics ±3% F.S. or less Repeatability ±1% F.S. or less Operating voltage 12 to 24VDC (ripple ±10% or less ) –26, –27: 50mA or less Current consumption 45mA or less 25mA or less –67: 60mA or less Pressure indication 3 1/2 digits (character height 8mm) Note 1) Self diagnostic function (Over current ), Over pressure, Data error, Presence of pressure at 0 clear Operating temperature range 0 to 50°C (with no condensation) Noise resistance 500Vp-p, Pulse width: 1µS, Start up: 1nS Withstand voltage Between external terminal batch and case: 1000VAC 50/60Hz for 1 min. Insulation resistance Between external terminal batch and case: 2MΩ (at 500VDC) 2hrs. each in X, Y, Z directions at smaller of 10 to 500Hz Vibration resistance with amplitude 1.5mm, or acceleration 10G 100G in X, Y, Z directions, 3 times each Impact resistance Note 1) Not available on analog output type. ∗ Refer to CAT.E824-A "Pressure Switch" for details on switches. Output specifications –25 (L) 1 output NPN open collector 30V, 80mA or less ZSE4 –26 (L) Analog output (1 to 5V) ZSE4B –67 (L) 1 output PNP open collector 80mA or less –26 (L) Analog output (1 to 5V) ZSE4E –27 (L) 2 outputs NPN open collector 30V, 80mA or less –67 (L) 2 outputs PNP open collector 80mA or less ∗ Refer to CAT.E824-A "Pressure Switch" for details on switches. 3 Series ZL Construction Without valve With valve Parts list Replacement parts No. Description Part No. No. Description Material Part No. Note Suction cover 1 9 Sound absorbing material B PVF ZL112-SP01 Front cover 2 Without valve 10 Sound absorbing material A PVF (set no. for 9, 10 &11) 3 End cover 11 PE Suction filter Body 4 ∗ When ordering a vacuum pressure gauge or a digital vacuum pressure switch separately, use the part numbers shown in the option specifications on page 3. Vacuum sensor unit 5 6 Nozzle Diffuser 7 Detent plug P397110 Other than vacuum switch 8 Lead wire cover P397176 Vacuum switch specifications Front cover B 12 With valve Valve plate 13 With valve 14 Needle With valve Supply valve (N.C.) 15 SYJ514 With valve Release valve (N.C.) 16 SYJ514 With valve 4 Multistage Ejector Series ZL Dimensions/Series ZL112 (without Valve) 2-ş5.4 50 117 Mounting hole Label Scale: 40% Exhaust with silencer P Standard V ZL112 166 4.5 56 Exhaust port 35 Rc1/2 P V Port exhaust ZL112P 14 Exhaust with silencer 2-ş5.4 Vacuum pressure gauge Mounting hole P With vacuum V pressure gauge ZL112-G Exhaust with silencer 2-ş5.4 7 Vacuum adapter Rc1/8 Mounting hole P With vacuum adapter V ZL112-GN 61 Exhaust with silencer 2-ş5.4 Mounting hole Vacuum pressure switch P With digital vacuum V pressure switch ZL112-E Approx. 500 (L: Approx. 2900) Section A Pressure supply port Vacuum port 2-ş5.4 One-touch fitting ş6 One-touch fitting ş12 Mounting hole Label MULTISTAGE EJECTOR 166 36 4.5 Section A 175 with digital vacuum pressure switch ZL112-E ZL112-EB (ZSE4B) (ZSE4) ZL112-EE (ZSE4E) 4-M4 x 0.7 Thread depth 8 (mounting hole) 59 85 5 59 56 28 20 8.5 RESET SET 30 59.5 (1.6) (2) Series ZL Dimensions/Series ZL112 (with Valve) With supply valve and release valve Scale: 40% ZL112-K1�L��-E25 (L) P 2-ş5.4 13.5 50 117 Mounting hole Manual override Vacuum pressure switch Exhaust with silencer Release valve P V V Supply valve 19 166 4.5 Circuit diagram Release flow rate adjustment needle Pressure supply port 2-ş5.4 One-touch fitting ş6 Manual override Mounting hole Vacuum port 500 One-touch fitting ş12 (L: 2900) Label MULTISTAGE EJECTOR 166 4.5 17 216 36 85 59 4-M4 x 0.7 Thread depth 8 (mounting hole) With supply valve ZL112-K2�L��-E25 (L) P Blank plate assembly (SYJ500-10-2A) P V V Supply valve Circuit diagram MULTISTAGE EJECTOR 6 66.5 35.7 RESETSET RESETSET 8.5 30 28 59.5 20 -+ -+ + - Multistage Ejector Series ZL212 Standard How to Order ZL2 12 Nozzle diameter Lead wire length 12 ş1.2mm Nil 0.5m L 2.9m With vacuum pressure gauge Exhaust specifications Nil Built-in silencer P Port exhaust Digital vacuum pressure switch specifications For E (ZSE4) EB (ZSE4B) Vacuum pressure sensor 25 NPN output Lead wire length 0.6 (3.0)m Nil None 26 Analog output Lead wire length 0.6 (3.0)m GN Adaptor Rc1/8 65 PNP output Lead wire length 0.6 (3.0)m G With vacuum pressure gauge For EE (ZSE4E) With digital vacuum pressure switch Lead wire length 0.6 (3.0)m E With digital vacuum pressure switch ZSE4 27 NPN output Lead wire length 0.6 (3.0)m EB With digital vacuum pressure switch ZSE4B 26 Analog output Lead wire length 0.6 (3.0)m EE With digital vacuum pressure switch ZSE4E 67 PNP output ∗ Not required for nil, vacuum adapter (GN) and vacuum pressure gauge (G). Ejector Specifications Model ZL212 Nozzle diameter ş1.2mm x 2 With adaptor Maximum suction flow rate 200l/min (ANR) Air consumption 126l/min (ANR) Maximum vacuum pressure –84kPa Maximum operating pressure 0.7MPa Supply pressure range 0.2 to 0.5MPa Standard supply pressure 0.4MPa Operating temperature range 5 to 50°C ∗ Refer to pages 2 and 3 for vacuum pressure gauge and digital vacuum pressure switch specifications. Port exhaust Symbol Standard P V 7 Series ZL Construction Replacement parts Parts list No. Description Part No. Note No. Description Material Part No. Sound absorbing material A PVF 1 Suction cover 9 P397114 2 Front cover A 10 Sound absorbing material PVF P397230 3 End plate ∗ When ordering a vacuum pressure gauge or a digital vacuum pressure switch separately, use the part numbers shown in the option specifications on page 3. 4 Body 5 Vacuum sensor unit 6 Nozzle 7 Diffuser Detent plug P397110 Other than vacuum switch 8 P397176 Vacuum switch specifications Lead wire cover 8 Multistage Ejector Series ZL Dimensions/Series ZL212 Scale: 40% Vacuum port Rc3/4 Pressure supply port Rc1/8 Exhaust with silencer 76 P Standard V ZL212 54 125 Label 188 61 P Port exhaust V ZL212P Exhaust port Rc1 25 Vacuum pressure gauge Exhaust with silencer P With vacuum V pressure gauge ZL212-G Vacuum adapter Rc1/8 Exhaust with silencer 7 P With vacuum adapter V ZL212-GN Vacuum pressure switch Exhaust with silencer With digital vacuum P pressure switch V ZL212-E Approx. 500 (L: approx. 2900) Section A 2-ş4.4 Mounting hole MULTISTAGE EJECTOR 5 178.5 4.5 (40) Section A with digital vacuum pressure switch ZL212-E ZL212-EB (ZSE4B) (ZSE4) ZL212-EE (ZSE4E) 4-M5 x 0.8 Thread depth 6 (mounting hole) 73 87 9 76 8 27 40 RESETSET 52 (1.6) (2) Series ZL Safety Instructions These safety instructions are intended to prevent a hazardous situation and/or equipment damage. These instructions indicate the level of potential hazard by labels of Note 1) "Caution", "Warning" or "Danger". To ensure safety, be sure to observe ISO 4414 , Note 2) JIS B 8370 and other safety practices. Operator error could result in injury or equipment damage. Caution : Operator error could result in serious injury or loss of life. Warning : In extreme conditions, there is a possible result of serious injury or loss of life. Danger : Note 1) ISO 4414 : Pneumatic fluid power -- Recommendations for the application of equipment to transmission and control systems. Note 2) JIS B 8370 : General Rules for Pneumatic Systems Warning 1. The compatibility of pneumatic equipment is the responsibility of the person who designs the pneumatic system or decides its specifications. Since the products specified here are used in various operating conditions, their compatibility for the specific pneumatic system must be based on specifications or after analysis and/or tests to meet your specific requirements. 2. Only trained personnel should operate pneumatically operated machinery and equipment. Compressed air can be dangerous if an operator is unfamiliar with it. Assembly, handling or repair of pneumatic systems should be performed by trained and experienced operators. 3. Do not service machinery/equipment or attempt to remove components until safety is confirmed. 1. Inspection and maintenance of machinery/equipment should only be performed after confirmation of safe locked-out control positions. 2. When equipment is to be removed, confirm the safety process as mentioned above. Cut the supply pressure for this equipment and exhaust all residual compressed air in the system. 3. Before machinery/equipment is restarted, take measures to prevent shooting-out of cylinder piston rod, etc. (Bleed air into the system gradually to create back pressure.) 4. Contact SMC if the product is to be used in any of the following conditions: 1. Conditions and environments beyond the given specifications, or if product is used outdoors. 2. Installation on equipment in conjunction with atomic energy, railway, air navigation, vehicles, medical equipment, food and beverages, recreation equipment, emergency stop circuits, press applications, or safety equipment. 3. An application which has the possibility of having negative effects on people, property, or animals, requiring special safety analysis. 10 Series ZL Vacuum Equipment Precautions 1 Be sure to read before handling. Selection Air Supply Warning Warning 1. Confirm the specifications. 4. Types of air The products appearing in this catalog are designed for use only Do not use compressed air containing chemicals, synthetic oil in compressed air systems (including vacuum). which includes organic solvents, salt, corrosive gases, etc., as this Do not use outside the specified ranges of pressure, temperature, may cause damage or malfunction. etc., as this may cause damage or faulty operation. (Refer to specifications.) Consult with SMC if fluids other than compressed air (including Operating Environment vacuum) are to be used. Warning Mounting 1. Do not operate in locations having an atmos- phere of corrosive gases, chemicals, sea Warning water, fresh water or water vapor, or where 1. Read the instruction manual carefully. there will be contact with the same. The product should be mounted and operated with a good under- standing of its contents. Also, keep the manual where it can be 2. In locations which receive direct sunlight, the easily referred to at any time. sunlight should be blocked . 2. Ensure space for maintenance. 3. Do not operate in locations where vibration Ensure the necessary space for maintenance activities. or impact occurs. 3. Be sure to tighten screws with the proper 4. Do not operate in locations near heat sources torque. where radiated heat will be received. When mounting, tighten screws with the recommended torque. Piping Maintenance Caution Warning 1. Preparation before piping 1. Maintenance should be performed in accor- Before piping is connected, it should be thoroughly blown out with dance with procedures in the instruction air (flushing) or washed to remove chips, cutting oil and other debris from inside the pipe. manual. Improper handling may cause damage or malfunction of equip- 2. Wrapping of pipe tape ment or machinery. When screwing together pipes and fittings, etc., be certain that chips from the pipe threads and sealing material do not get inside 2. Maintenance work the piping. Improper handling of compressed air is dangerous. Therefore, in Further, when pipe tape is used, leave 1.5 to 2 thread ridges addition to observing the product specifications, replacement of exposed at the end of the threads. elements and other maintenance activities should be performed by personnel having sufficient knowledge and experience pertain- Air Supply ing to pneumatic equipment. 3. Drain flushing Warning Drainage should be flushed from air filter and other drains on a regular basis. (Refer to specifications.) 1. Types of fluid This product is designed for use with pressurized air. Consult with 4. Pre-maintenance inspection SMC if a different fluid is to be used. When removing this product, turn off the electric power and be Consult SMC regarding products to be used with general purpose certain to shut off the supply pressure and exhaust the com- fluids, to confirm which fluids may be used. pressed air in the system. Proceed only after confirming that all pressure has been released to the atmosphere. 2. When there is a large amount of drainage 5. Post maintenance inspection Pressurized air containing a large amount of drainage can cause the malfunction of pneumatic equipment. An air dryer or Drain After installation, repair or reconstruction, reconnect pressurized Catch should be installed upstream from filters. air and electric power, and then perform inspections for proper operation and air leakage. If the sound of air leakage can be 3. Drain management heard, or if the equipment does not operate properly, stop opera- If the air filter drains are not flushed regularly, the drainage will tion and confirm that it is mounted correctly. flow downstream from the drains and this may lead to the mal- 6. Disassembly and alteration prohibited. function of pneumatic equipment. Do not disassemble the unit or make any alterations to it. In cases where the management of drain flushing will be difficult, the use of filters with automatic drains is recommended. For details on the qualities of compressed air, refer to SMC's "Air Cleaning Equipment” catalog. 11 Series ZL Vacuum Equipment Precautions 2 Be sure to read before handling. Design & Selection Mounting Warning Warning 1. Create a safe design, which addresses the 1. Do not obstruct the exhaust port of the ejector. possibility of accidents resulting from a drop If the exhaust port is obstructed when mounted, a vacuum will not be generated. in vacuum pressure due to power failure or Piping trouble with the air supply, etc. If vacuum pressure drops and there is a loss of vacuum pad adsorp- tion force, work pieces being carried may fall, causing a danger of Caution human injury and/or damage to machinery. Safety measures should 1. Avoid disorganized piping. be implemented, such as the installation of drop prevention guides. Piping which is direct and of the shortest possible length should 2. Use vacuum specifications for vacuum be used for both the vacuum and supply sides, and disorganized switching valves and vacuum breakers. piping should be avoided. Unnecessary length increases the pip- ing volume, and this increases the response time. If valves which do not meet vacuum specifications are installed in vacuum piping, vacuum leakage will occur. Be certain to use vacu- 2. Use piping having a large effective section- um specification valves. al area on the exhaust side of the ejector. 3. Select ejectors which have a suitable suction If the exhaust piping is restrictive, there will be a decline in the flow rate. ejector's performance. the piping due to damage or bending. If the ejector's suction flow rate is too low, this will cause poor adsorp- tion. Operating Environment The adsorption response time will increase due to the increased vol- ume of the piping. Warning Select ejectors with a suitable suction flow rate by referring to their technical data. 1. Do not operate in locations having an atmos- phere of corrosive gases, chemicals, sea 4. If the suction flow rate is too high, setting of water, water or steam, or where there will be vacuum switches will become difficult. contact with the same. In the case of adsorption on a small work piece of only a few mil- limeters, if an ejector is selected which has a high suction flow rate, 2. Do not operate in locations having an explo- the pressure difference when adsorbing and releasing the work sive atmosphere. piece is small. Since setting of the vacuum switch may become dif- ficult, an appropriate ejector should be selected. 3. Do not operate in locations where vibration 5. When two or more pads are piped to one ejec- or impact occurs. tor, if one pad releases its work piece, the Confirm the specifications for each series. other pads will also release. 4. In locations which receive direct sunlight, When one pad is removed from its work piece, there is a drop in vac- provide a protective cover, etc. uum pressure which causes the other pads to release their work pieces also. 5. In locations near heat sources, block off any 6. Use piping with an adequate effective sec- radiated heat. tional area. 6. In locations where there is contact with Select piping for the vacuum side which has an adequate effective water, oil or welding spatter, etc., implement sectional area, so that the ejector's maximum suction flow rate can suitable protective measures. be accommodated by the piping. Also, make sure that there are no unnecessary restrictions or leaks, 7. In cases where the vacuum unit is surround- etc., along the course of the piping. ed by other equipment or it is energized for The piping on the air supply side must be designed so that it corre- sponds to each ejector's air consumption. The effective sectional an extended time etc., implement measures area of tubing, fittings and valves, etc., should be sufficiently large, to radiate excess heat so that temperatures and the pressure drop reaching the ejector should be kept to a min- remain within the range of specifications. imum. Further, design of the air supply should be performed while taking into consideration the ejector's maximum air consumption and the air Maintenance consumption of other pneumatic circuits. Caution Warning 1. For information on related items, such as 1. Clean suction filters and silencers on a regu- directional control equipment and drive equip- lar basis. ment, refer to the caution sections in each The performance of ejectors will deteriorate due to clogging in fil- respective catalog. ters and silencers. Large capacity filters should be used, espe- cially in dusty locations. 12 SeriesZL Electronic Pressure Switch Precautions 1 Be sure to read before handling. Design & Selection Wiring Warning Warning 1. Use with the specified voltage. 1. Confirm wire colors and terminal numbers Use with voltage outside of the specifications can cause malfunc- when wiring is performed. tion or switch damage, as well as electrocution and fire hazard, Since incorrect wiring can lead to breakage or failure of the switch etc. as well as malfunction, perform wiring after confirming wiring col- ors and terminal numbers with the instruction manual. 2. Never use a load which exceeds the maxi- mum load capacity. 2. Avoid repeatedly bending or stretching lead This may damage a switch or reduce its service life. wires. Broken lead wires will result from applying bending stress or 3. Do not use a load that generates surge volt- stretching force to the lead wires. In the event that lead wires are age. damaged creating a possibility of malfunction, replace the entire Although surge protection is provided at the output side of a product. (For cases in which the lead wires cannot be replaced switch, damage may still occur if the surge is applied repeatedly. through grommets.) When a load, such as a relay or solenoid, which generates surge 3. Confirm proper insulation of wiring. is directly driven, use a type of switch having a built-in surge absorbing element. Be certain that there is no faulty wiring insulation (contact with other circuits, ground fault, improper insulation between terminals, 4. Be sure to confirm the fluid specifications. etc.). Damage may occur due to excess current flow into a switch. Since switches do not have explosion-proof construction, do not 4. Do not wire with power lines or high voltage use flammable gases or fluids. This may cause a fire or explosion. lines. 5. Be certain to observe the regulating pres- Wire separately from power lines or high voltage lines, avoiding sure range and maximum operating pres- parallel wiring or wiring in the same conduit with these lines. sure. Control circuits containing switches may malfunction due to noise from these other lines. Operation at a pressure outside of this range can cause failure. In addition, the switch will be broken if operated above the maxi- 5. Do not allow short circuiting of loads. mum operating pressure. Use caution, as switches will be damaged instantly if a load is short circuited. Be especially careful not to reverse the power sup- ply line (Brown) and the output line (Black). Mounting Pressure Source Warning 1. Do not use if equipment does not operate Warning properly. Verify correct mounting by suitable function and leakage inspections 1. Observe the fluid and ambient temperature after air and power are connected following mounting, maintenance ranges. or conversions. The fluid and ambient temperatures are 0 to 60°C. Since moisture 2. Do not drop or bump. in circuits can freeze at 5°C or below, causing damage to O-rings and malfunction, take measures to prevent freezing. The installa- Do not drop, bump or apply excessive impact (1000m/s²) when tion of an air dryer is recommended to remove drainage and mois- handling. Even if the switch body is not damaged, the switch may ture from circuits. Furthermore, even though the ambient temper- suffer internal damage that will lead to malfunction. ature range remains within specifications, do not operate in loca- 3. Hold the product from the body side when tions where there are abrupt temperature changes. handling. 2. Vacuum pressure switches The tensile strength of the power cord is 49N, and pulling it with a There will be no change in performance if a pressure of 0.5MPa force greater than this can cause failure. Hold by the body when or less is applied for 1 second or less (when releasing a vacuum), handling. but care should be taken that pressures of 0.2MPa or more are not applied on a regular basis. 4. Turn the setting trimmer gently using a watchmakers screw driver. Turn the setting trimmer gently using a watchmakers screw driver. Do not turn beyond the stoppers located at both ends. If the trim- mer is broken, adjustment will be impossible. 5. Pressure port Do not insert wire, etc., from the pressure port. This will damage the pressure sensor, making it impossible to obtain normal opera- tion. 13 SeriesZL Electronic Pressure Switch Precautions 2 Be sure to read before handling. Operating Environment Maintenance Warning Warning 1. Never use in an atmosphere of explosive 1. Perform maintenance regularly and confirm gases. normal operation. The structure of pressure switches is not intended to prevent It may otherwise not be possible to assure safety due to unex- explosion. Never use in an atmosphere with an explosive gas pected malfunction or misoperation, etc. since this may cause a serious explosion. 2. When used in an interlock circuit 2. Do not use in locations with sources of When used in an interlock circuit, provide multiple interlock circuits surge generation. as a precaution against failure, and also perform regular inspec- tions to confirm normal operation. When equipment that generates a large amount of surge (sole- noid type lifters, high frequency induction furnaces, motors, etc.) 3. Cleaning the case is located in the area around a pressure switch, there is a danger Use a soft cloth to clean the case. In case of heavy soiling, first of deterioration or damage to the switch's internal circuit elements. soak the cloth in a neutral detergent diluted with water and wring Therefore, implement surge countermeasures at the sources, and it out thoroughly. Finish up by wiping with a dry cloth. avoid the mixing and touching of lines. 3. Operating environment Since the electronic pressure switch is basically an open type, avoid use in locations where there is splashing of water or oil, etc. 14 Series ZL Specific Product Precautions 1 Be sure to read before handling. Refer to pages 10 through 14 for safety instructions, vacuum equipment precautions and electronic pressure switch precautions. Piping Caution 1. Connect the compressed air supply piping separately to the solenoid valves and ejector valves. Also, connect pip- ing to the ejector valve stations. Operation of Ejector Valves Caution 1. When the pilot valve for air supply is turned ON, the main valve switches, and vacuum is generated by the flow of compressed air from the nozzle to the diffuser. When the pilot valve for vacuum release is turned ON, the main valve switches, and the vacuum is quickly released as air pass- es through the release flow adjustment needle and flows to the vacuum port. Environment Caution 1. Operate away from direct sunlight. Solenoid Valves (Series ZL112/ZL212) Caution 1. For specific product precautions on solenoid valves (Series ZL112), refer to the solenoid valve (Series SYJ500) cata- log CAT.E143-B. 15