SD101201

Gear Tooth Speed and Direction Sensor SD101201 Sensors Circuit protected, flange mount Hall Effect gear tooth speed and direction sensor Description The SD101201 has two Hall Effect sensors; one detects speed and the other detects direction of movement of gear teeth. The outputs are open collector transistors. The Speed output goes low (ON) when sensing the leading edge of a tooth and high (OFF) at the trailing edge of the tooth when run against a standard target (see diagram). The Direction output goes low (ON) for clockwise rotation and high (OFF) for counterclockwise rotation (as seen in the diagram); it is latched in that state as long as there is movement detected. The state of the Direction output always leads the rising edge of the Speed output – correct Direction sensing will occur faster after start-up than correct Speed sensing. An external pull-up resistor is required. Features       Separate digital outputs for speed and direction From near zero speed up to 15 kHz sensing capability Plastic flange-mount sensor rated to 125 ⁰C RoHS compliant IP67 Typical air gap of 1.5 mm (0.06”)* Typical Applications     Wheel speed and direction Hoist speed and direction Transmission speed and direction Industrial feedback and control Environmental Specifications Vibration Maximum Speed Detection Operating Temperature Storage Temperature Ingress Protection Sinusoidal, 3.3 g max from 20 Hz to 1 kHz 15 kHz -40 ⁰C to 125 ⁰C (-40 ⁰F to 257 ⁰F) -40 ⁰C to 125 ⁰C (-40 ⁰F to 257 ⁰F) IP67 Electrical Specifications Operating Supply Voltage Maximum Input Voltage Maximum Reverse Voltage Supply Current Output Sink Current Typical Operating Time Recommended Pull-Up Resistor 4.75 to 24 VDC 30 VDC 30 VDC 20 mA max 20 mA max 5 µs See chart Mechanical Specifications Housing Material Maximum Installation Torque Limit Operating Air Gap / Sensing Distance* * With recommended target type; see drawing Sensor Orientation Glass Reinforced Thermoplastic 5.65 Nm (50 in lb) on threads 1.5 mm (0.06") Sensitive; see drawing Products Part Number SD101201 Connector** Delphi Metri-Pak 150 ** Mates to Delphi 12162833 connector, 12124075 terminal Note: An external pull-up resistor is required, the value of which is dependent on the supply voltage. The resistor should be connected between the output and Vcc. Refer to the wiring diagram for lead colors or pin numbering as applicable. www.cherryswitches.com Page 1 of 2, Last saved by 2014-10-29, Specifications subject to change without notice. Recommended External Pull-Up Resistor Volts DC Ohms 5 1k 9 1.8k 12 2.4k 15 3k 24 4.8k Open Collector Sinking Block Diagram PIN A Direction Output PIN B Speed Output PIN C Power PIN D Ground Dimensions mm (inches) Installation For best results, we recommend targets made from low carbon cold rolled steel. Other factors that influence sensor performance include gear tooth height and width, space between the teeth, shape of the teeth and thickness of the target. As a general guideline, consider a target with minimum parameters as shown below. Note that smaller dimensions may work, but testing for the application is required. Tooth Height 5.0 mm (.200") Tooth Width Distance between Teeth 2.5 mm (.100") 10 mm (.400") www.cherryswitches.com Page 2 of 2, Last saved by 2014-10-29, Specifications subject to change without notice. Target Thickness 6.35 mm (.250")