AHF2 SMALL, HIGHLY RELIABLE TIP SENSOR CONTAINING A PHOTO SENSOR TIP (AHF2) SWITCHES FEATURES TYPICAL APPLICATIONS * Realizes miniaturization of equipment and spaces saving. Size of body: 9.5x9.5x9.3 mm .374x.374x.366 inch * The contact type is equivalent to normally closed contacts, which satisfies the PL Act. * The internal sphere can be used over an operation angle of 360 degrees in the circumferential direction. * There are three standard terminal profiles which can be selected according to the mounting direction of the PCB. * The terminals are tin-plated for longterm solderability. * Gas heaters * Electric fans * Water vallet * Infrared treatment device * Electric pots with warming function ORDERING INFORMATION Mounting direction Part No. Vertical mounting AHF21 Horizontal mounting AHF22 Reverse mounting AHF23 PCB mounting condition Remark: Standard Packaging: Tube 50 pcs. CONTACT TYPE BASIC CHARACTERISTICS Normally closed type (The photo transistor is ON when the sensor is being used.) For Ta = 25C 77F and applicable circuit conditions 1) Operation characteristics (Operation speed 6 degrees/second) * Operation angle (Output: VOL VOH): 25 to 60 degrees * Return angle (Output: VOH VOL): Min. 20 degrees APPLICABLE CIRCUIT Refer to the dimensional diagram for the terminal Nos. * VCC = 5 V * R2 = 100 k * Forward current, IF, of the LED: 19 mA (VCC = 5 V, R1 = 200 ) * Forward voltage, VF, of the LED: Typ = 1.2 V R2 Terminal No. 3 VO IF Tip switch Terminal No. 1 R1 (VCC) 144 R tion Output characteristics H VCC Terminal No. 2 O Operat a n g le ion a Output characteris ngle R eturn tics L g le n a a ng rn le etu ra pe Terminal No. 4 2) Output (VO) characteristics (The sphere must be stationary.) * VOL (photo transistor ON): Max. 1.0 V (horizontal) * VOH (photo transistor OFF): Min. 4.0 V (inclined at an angle of at least 60 degrees) AHF2 SPECIFICATIONS Item Specificaitons Min. 105 (Using the applicable circuit) At 6 cpm; Opening and closing position: 0 deg. 90 deg. (The internal shpere must be stationary for at least 500 ms at angles of 0 and 90 deg. respectively.) 10 to 400 Hz acceleration 2.9 m/s2 applied for 7 days 5 to 10 Hz at half amplitude of 5 mm, 5x105 cycles 588 m/s2 applied 3 times in each of 6 directions Min. 9.8 N (each direction) Three times from height of 100 cm Leave for 500 hours at 85C 185F and 85% RH (No freezing at low temperature) Leave for 500 hours at 85C 185F Leave for 500 hours at -25C -13F (No freezing at low temperature) Subject to 100 cycles each consisting of 30 minutes at -25C -13F and 30 minutes at 85C 185F. Leave for 500 hours in an atmosphere containing 3 ppm of hydrogen sulfide at 40C 104F and 75% RH. Leave for 500 hours in an atmosphere containing 10 ppm of sulfur dioxide at 40C 104F and 95% RH Leave for 96 hours in an atmosphere containing 3% of ammonia gas at normal temperature and humidity. Mix with 2 kg/m3 talcum powder or fly ash and leave to stand for 8 hours -20 to +80C -4 to +176F (No freezing nor condensation at low temperature) Electrical and mechanical life Vibration resistance Shock resistance Terminal strength Dropping individual part High temperature, high humidity storage ability High temperature storage ability Low temperature storage ability Shock and heat resistance Resistance to hydrogen sulfide Resistance to sulfur dioxide gas Resistance to ammonia gas Resistance to dust Ambient temperature Notes: 1.Without any indications, specifications are measured at following conditions * Temperature: 15 to 35C 59 to 95F * Humidity: 25 to 85% RH * Atmospheric pressure: 86 to 106 kpa. 2.The evaluation criteria for performance are as follows: Basic characteristics - Ta = 25C 77F and applicable circuit conditions 1) Operation characteristics (operation speed 6 degrees/sec.) * Operation angle (Output: VOL VOH): 25 to 60 degrees * Return angle (Output: VOH VOL): 20 degrees min. 2) Output (VO) characteristics (The sphere must be stationary.) * VOL (photo transistor ON): 1.2 V max. (horizontal) * VOH (photo transistor OFF): 3.8 V min. (inclined at an angle of at least 60 degrees) DIMENSIONS mm inch * Horizontal mounting type PC board pattern (Bottom view) Terminal No. 1 (LED: Anode) Terminal No. 2 (LED: Cathode) 9.5 dia. .374 dia. Terminal No. 4 (Photo transistor: Emitter) 1.3 dia. .051 dia. Terminal No. 4 (Photo transistor: Emitter) Horizontal datum line PC board Terminal No. 1 (LED: Anode) 6.55 9.3 .258 .366 1.75 3.7 .069 .146 3.0 .118 4.0 .157 7.9 .311 9.5 .374 11.5 .453 2.6 .102 5.10.1 .201.004 3.10.1 .122.004 Terminal No. 3 (Photo transistor: Collector) Terminal No. 3 (Photo transistor: Collector) 11.90.1 .469.004 Terminal No. 2 (LED: Cathode) Horizontal datum line C0.3 .012 3.1 C0.3 .122 0.9 .012 .035 5.1 .201 9.5 .374 * Vertical mounting type PC board pattern (Bottom view) Terminal No. 1 1.3 dia. (LED: Anode) .051 dia. PC board Terminal No. 1 11.50.5 .453.020 2.6 .102 Terminal No. 2 5.10.4 .201.016 0.9 .035 Terminal No. 4 Terminal No. 3 Terminal No. 2 (LED: Cathode) 5.10.1 .201.004 3.10.1 .122.004 11.90.1 Terminal No. 4 .469.004 Terminal No. 3 (Photo transistor: Emitter) (Photo transistor: Collector) 3.10.4 .122.016 145 AHF2 * Reverse mounting type mm inch PC board pattern (Bottom view) Terminal No. 2 Terminal No. 1 Terminal No. 4 5.10.5 .201.020 Terminal No. 3 11.50.7 .453.028 2.6 .102 3.10.5 .122.020 0.9 .035 PC board [Internal circuit and applicable circuit] Terminal No. 1 Terminal No. 2 (LED: Anode) 1.3 dia. (LED: Cathode) .051 dia. 3.10.1 5.10.1 .201.004 .122.004 11.90.1 .469.004 Terminal No. 3 Terminal No. 4 (Photo transistor: Emitter) (Photo transistor: Collector) VCC Terminal No. 2 R2 Terminal No. 3 VO IF Tip switch Terminal No. 1 11.9 .469 R1 Terminal No. 4 (VCC) NOTES 1. Handling 1) In the enent that a voltage or current that exceeds the maximum rating is applied to, or passed between the terminals, the photo-transistor will no longer function normally. In such a case, do not reuse the photo-transistor but discard it. 2) Be careful not to apply an excessively large load to the terminals because this may damage the photo-transistor. 2. Soldering 1) When soldering by hand, use a 18W soldering iron that has a temperature regulator (iron tip temperature must be no more than 350C 662F) and apply the tip to the joint for no more than 3 seconds. 2) When performing automatic soldering, ensure that the board does not remain in the solder bath for more than 10 seconds at 260C 500F, or more than 3 seconds at 350C 662F. 3) Be careful not to move the terminals for one minute after soldering them. 3. Environment This product is a non-contact type tip detection switch containing a photo-interrupter. It is intended for installation in equipment. Because of the nature of a semiconductor, if this product is used continuously for a long period in a high temperature, low temperature and/or humid environment, according to the optic quan- 146 tities decrease of luminescent diode output characteristics may be significantly affected. In such a case, take suitable measures, such as inserting a comparator at the output side, to provide a greater degree of margin with respect to change in the output characteristics, and thereby improve the reliability of the product. 4. Preventing a malfunction 1) The tip sensor uses an internal sphere, hence chattering occurs if it is subjected to vibration or shock. To prevent chattering, continuously read pulses of 30 ms max. using a microprocessor, and set the microprocessor so that the switch goes L (ON) or H (OFF) if the output level exceeds 500 ms continuously. Also, take steps to keep induction and RF noise away from the sensor. Output of Tip switch Max. 30 ms continuous H for 500 ms or more Transistor OFF Transistor ON Judgement of switch OFF state 2) The switch should be mounted keeping away from the vibration generator such as motor. Fix the PC board firmly in order to prevent resonance with the vibration generator, or the contact chattering of a switch may occur by the movement of a ball inside. The allowable vibration level which the chattering does not occur would be less than {0.3G} at 10 to 260Hz and 320 to 400Hz. The range 260 to 320Hz may have a resonance point and the level should be less than 0.1G. 5. Others 1) Depending on the circuitry and the environmental conditions, solder migration may occur and short a circuit. Please confirm that the insulation distance is large enough in the actual application. 2) To prevent a malfunction, the switch should be kept away from the direct sunlight and any other light sources. 3) The noises caused by electrostatics, surge voltage and inductives may break the photo-interruptor. 4) The reflow soldering and cleaning are not allowed. 5) The switch should be mounted with the tolerance 3 degree. 6. Confirmations in the actual use. Each items in this spec sheet was tested and confirmed independently at a certain duration. To get a higher reliability of the equipment, please confirm the switch quality with the actual load and environmental conditions before using.