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ZC-W355 Datasheet(PDF) 7 Page - Omron Electronics LLC |
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ZC-W355 Datasheet(HTML) 7 Page - Omron Electronics LLC |
7 / 8 page 7 ZC- @55 Safety Precautions Refer to Safety Precautions for All Limit Switches. Operating Environment • Seal material may deteriorate if a Switch is used outdoor or where subject to special cutting oils, solvents, or chemicals. Always appraise performance under actual application conditions and set suitable maintenance and replacement periods. • Install Switches where they will not be directly subject to cutting chips, dust, or dirt. The Actuator and Switch must also be protected from the accumulation of cutting chips or sludge. • Constantly subjecting a Switch to vibration or shock can result in wear, which can lead to contact interference with contacts, operation failure, reduced durability, and other problems. Excessive vibration or shock can lead to false contact operation or damage. Install Switches in locations not subject to shock and vibration and in orientations that will not produce resonance. • The Switches have physical contacts. Using them in environments containing silicon gas will result in the formation of silicon oxide (SiO2) due to arc energy. If silicon oxide accumulates on the contacts, contact interference can occur. If silicon oil, silicon filling agents, silicon cables, or other silicon products are present near the Switch, suppress arcing with contact protective circuits (surge killers) or remove the source of silicon gas. Dog Angle When operating the roller type, be sure to set the dog angle to less than 30 ° (even when operating at a low speed). Operating the model at a dog angle exceeding 30 ° will soon cause abrasion or damage. Do not apply a twisting force to the plunger. Set the OT to 70% to 100% of the specified value so that the actuator will not exceed the OT. Handling • When detaching the Terminal Protective Cover, insert a screwdriver and apply a force in the opening direction. Do not use excess force to remove the cover. Doing so may cause deformation in the fitting section and reduce the holding force. • When mounting the Terminal Protective Cover to the case, align the cover on the case and then press the cover down to mount it firmly. If the cover is pressed down in an inclined position, rubber packing will deform and thus affect the sealing capability. • A 8.5-dia. to 10.5-dia. cable can be applied as seal rubber for the lead wire outlet. (Use two- or three-core cable of VCT1.25 mm2.) • Use weather-proof rubber (chloroprene rubber) as seal rubber for the ZC-N22(21)55. Micro Load Models Contact failure may occur is a General-purpose Switch is used to switch a microload circuit. Use Switches within the areas shown in the following chart. Even when using Microload Switches within the area shown below, contact wear will become more extreme with loads that generate surge current when switching and durability will be adversely affected. If necessary, insert a contact protective circuit. Microloads are indicated by N standard reference values. This value represents the failure rate at a 60% ( λ60) reliability level. (JIS C5003) The equation λ60 = 0.5 × 10−6/operations indicates that a failure rate of 1/2,000,000 operations can be expected at a reliability level of 60%. Mounting • When mounting the Switch with screws on a side surface, fasten the Switch with M4 screws and use washers, spring washers, etc., to ensure secure mounting. • When mounting the Panel Mount- type Enclosed Switch (ZC-Q55, ZC- Q2255, or ZC-Q2155) with screws on a side surface, remove the hexagonal nuts from the actuator. Appropriate Tightening Torque A loose screw may result in a malfunction. Be sure to tighten each screw to the proper tightening torque as shown below. Operation With the ZC-Q22(21)55, an appropriate OT line is marked on the plunger. Set the OT so that it is between the two X-surface lines. Precautions for Correct Use Not Suitable Suitable Rubber packing Rubber packing Model ZC- @55-01 ZC- @55 Minimum applicable load 5 VDC 1mA 5 VDC 160mA No. Type Appropriate Tightening Torque (1) Terminal screw 0.78 to 1.18 N·m (2) Panel mounting screw 4.90 to 7.84 N·m (3) Side mounting screw 1.18 to 1.47 N·m Applicable area for General- purpose Models (ZC- @55) 30 24 12 5 0 1 10 100 1,000 Current (mA) 0.1 100 mA 1 mA 26 mA 0.8 W 100 mA 160 mA Not applicable Applicable area for Microload Models (ZC- @55-01) Two, 4.3-dia. or M4 screw holes 25.4±0.15 Mounting Holes 14.5+0.2 0 dia. Mounting Holes |
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