Thumb Wheel Preset Switches - Series 88
OVERVIEW
Series 88 is a PCB mountable Thumb Wheel Switch offering the most economical method of handsetting coded values. It eliminates wiring, requires minimum space and can be mounted horizontally or vertically to suit the application. 10 or 16 legend locations assure readability from top or side. Series 88 can be set by knurled wheel, screwdriver or optional extended shaft and the finished bezel allows front panel mounting. Optional stops, coloured rotors, or special making are available.
FEATURES:
» Direct PCB mountable.
» Allows front panel operation.
» Optional marking/colour available.
» Contacts insert moulded.
» Available in various Truth Tables/Codes.
» Occupies in small volume.
SPECIFICATIONS
| CONTACT RATING : | Switching 125mA max. Carrying : 0.5Amp continuous |
| OPERATING VOLTAGE : | 50mV to 28V DC or 120V AC. |
| CONTACT RESISTANCE : | Less than 150 milli ohms Initial @ 2-6V DC, 100mA. |
| INSULATION RESISTANCE : | 1000 Megohms min. |
| DIELECTRIC STRENGTH : | 500V RMS min @ sea level |
| ELECTRICAL LIFE : | 100,000 detent operations |
| OPERATING TEMP : | -25deg C to +70deg C |
| NO. OF POSITIONS : | 10 (stops available) |
MATERIALS & FINISHES
| BODY, WHEEL AND CAM : | Engineering Thermoplastics (Polycarbonate/ABS/Poly acetal) |
| WIPER CONTACT : | Hard Gold over Nickel on Copper Alloy |
| STATOR CONTACT : | Hard Gold over Nickel over Copper on Glass Epoxy laminated sheet to Nema FR4. |
| HARDWARE : | Steel, Zinc plated |
| DETENT SPRING : | Stainless steel wire |
| SIZE OF CHARACTER ON THE WHEEL : | 10 positions -5mm (Consult factory for non-standard printing). |
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