1、EIA 44b-3 81 W 3234600 00b8977 4 W -I - t CI) . ANSI/EIA RS-446-3 - 1981 APPROVED FEBRUARY 3,1981 EIA STANDARD Co d- ILLUMINATED AND NON-ILLUMINATED d- I PUSHBUTTON SWITCHES rn .750 SQUARE MOUNTING, - 1 AND 2 POLES, .o01 TO 10 AMPERES m RS =446 3 (Addendum No. 3 to RS-446) FEBRUARY 1981 , f 52 * o.
2、2 5 , ,. 060.010: 36.58 1 .u+ -I RECOMMENDED PANEL CUT-OUT I . I -T- I PANEL TIIICKNESS -Jul brl FIGURE 1 MOUNTING DIMENSIONS FOR TYPE 1 HOUSING 1 PROBLEM HARD EPY EIA 44b-3 BI 3234600 00bBBI b RC-446 Addendum 3 Page 2 I 20,322 O, 38 .800t, 015 15,24?0,25 KECObMENDED PANEL CUY-OUT NON-ILLUMINATED OR
3、 4 83 INCANDESCENT LAMP DISPLAY A- -19 L I I 1 I FIGURE II MOUNTING DIMENSIONS FOR TYPE II HOUSING PANEL THICK,NESS PROBLEM HARD C0PF- - e EIA 446-3 AL m 3234600 0068982 8 m RS-446 Addendum 3 Page 3 NOTES: (Applicable to Figures I and II) (1) Dimensions are denoted as follows: 0.0 = mm 0.00 = inches
4、 (2) Metric dimensions are based upon 1.0 inch = 25.4 millimeters (3) Rounding (inch to millimeter) of tolerances: Derived Millimeter Tolerances Rounded to the Nearest: Inch Tolerance Range + .O0016 to + .O016 - - 0.001 (3 decimal places) + .O016 to + .O16 0.01 (2 decimal places) - - + .O16 to - + .
5、16 - 0.1 (i decimal place) (4) Tolerances on all dimensions are - + .O31 inch (+ - .79 mm) unless otherwise specified. (5) Switch enclosure dimensions are shown in Figures I and II are common for the housing type detailed to all switches covered by this detail specification. The configuration is opt
6、ional within the specified dimensions. RS-446 Adderidum 3 Page 4 EIA 44b-3 1 m 3234600 00bA93 T m 1.0 SCOPE . The non-sensitive pushbutton switches covered by this detail specification: (a) Will snap-in mount in either a .75 inch (19.0 mm) square or a .75 inch (19.0 mm) x 1.141 (29.0 mm) rectangular
7、 panel cutout. Have a rated voltage not exceeding 250 Vac. (b) (c) Have a rated current not exceeding 10 amperes. (d) Have a logic load rating. (e) Are intended for use as power (line-disconnect) switches or control switches in various equipment including, but not restricted to office and business m
8、achines, instrumentation, vending machines, industrial controls, computer consoles, communications equipment, and appliances. 2.0 DEFINITIONS In addition to the definitions of EIA Recommended Standard RS-446, the following definitions shall apply: (a) Dead Front - When the lamp is not illuminated, t
9、he display screen is black. When the lamp is illuminated, a different color or a legend appears on the display screen. Projected Color - The color is projected from a color filter onto the display screen which is usually white when the lamp is not illuminated. Transmitted Color - The color of the di
10、splay screen is transmitted to the viewer. (b) IC) 3.0 DESIGN REQUIREMENTS The following design requirements supplement the design requirements of EIA Recommended Standard RS-446. 3.1 Dimensions 3.1.1 Terminal Dimensions The terminai dimensions shall be in accordance with Figures I, II and III. The
11、dashed lines in Figure I and II represent the maximum dimensions within which the terminals must be located. The terminal location within the specified envelope is optional. 3.1.2 Button Dimensions The button dimensions shall be in accordance with Figures I, II, and III. 3.2 Attitude The switches sh
12、all be so constructed as to insure proper operation when mounted in any direction. O O c EIA 446-3 8L 3234b00 0068984 L RC-446 Addendum 3 Page 5 FIGURE III TERMINAL TYPES 7,62 rt 0,76, .300 f .O30 0,508 rt: 0,lO y/+- .O20 f .GO4 2,794 j, 0,lS .110 f .O06 - Type I i/ Solder or Quick Connect 7,62+0,80
13、 .300_+. 031 O, 50f0,08 .020f. 003 Type IT. i/ Colder or Quick Connect - Type Ti1 2/ Wire Wrap or Printed Circuit - II i/ 2/ 3/ - 4/ The Quick Connect Terminals shall accept female connectors in accordance with 48C(Cecretariat)88. Printed circuit terminals comply with grid spacing requirements of IE
14、C Publication 97: Terminal Types I and III available for Electronic Control Switch only. Terminal Type II available for Power Switch only. - - - EIA 446-3 81 m 3234b00 0068785 3 m a RS-446 Addendum 3 Page 6 O FIGURE IV - BUTTON CI3 Power Switch Buttons c .25 4 B. C. er U*.- il- -.- Rectangular Full
15、Screen Neon Button - .- Electronic control witcli Buttons A Square Fui1 Screen C. Rectangular Full Screen D. Rectangular 2-Split Ho r i zon t a i .-.- EIA 44b-3 81 m 3234600 0068786 5 RS-446 Addendum 3 Page 7 8 3.0 DESIGN REQUIREMENTS (continued) 3.3 Workmanship The construction shall be of the unif
16、ormity and grade of workmanship practicable in a well-equipped factory. 3.4 Marking In addition to the marking requirements of RS-446, the applicable part number of Table IV shall be marked on the switch if space permits. If not marked on the switch, the part number shall be marked on the unit packa
17、ge for the switch. 4.0 PERFORMANCE REQUIREMENTS The performance requirements of ANSI/EIA RS-446 apply as follows: 4.1 4.2 4.3 4.4 4.5 4.6 4.7 4.8 4.9 4.10 4.11 4.12 4.13 Visual Inspection - Dimensional Examination - Operating Characteristics - Switch Resistance - Insulation Resistance - Voltage Proo
18、f - Temperature Rise - Capacitance - Actuator Strength - Strength of Mounting Means - Terminal Strength: Terminal Types I and II - Terminal Type III - Chromaticity - Transmittance (Luminance) - Marking per para 3.4 herein Per Figure I thru JY Per Table II .600 ohms maximum 1000 megohms minimum at 50
19、0 Vdc 1000 volts 5OoC maximum Not applicable 4.5 kilograms (10 lbs) Not applicable 2 kilograms (4.4 lbs) 2 kilograms (4.4 lbs) per ANSI/EIA RS-186-6, Type I Not applicable Not applicable EIA 44b-3 81 3234b00 00b8987 7 m RS-446 Addendum 3 Page 8 ,. 4.0 PERFORMANCE REQUIREMENTS (continued) 4.14 4.15 4
20、.16 4.17 4.18 4.19 4.20 4.21 4.22 4.23 4.24 4.25 Overload: Power Switch - Electronic Control: Rating Code A - Rating Code 6 - Electrical Endurance - Mechanical Endurance - High-Low Temperature Endurance - Temperature Shock - Effects of Soldering - Solderability - Vibration - Shock - Humidity - Corro
21、sion - Cant-act Bounce - Applicable Applicable Not applicable Per Table I Refer to High-Low Temperature Endurance Ratings 100,000 cycles at -4OOC and +65OC and at 60 cycles per minute., test units shall be equally divided between the two temperatures. The -4OOC and +85OC Not applicable Applicable to
22、 terminal types I, II, and III Type I (lOGs, 10-500 cps) Test Condition C (50Gs) Applicable Applicable Not applicable EIA 446-3 81 m 3234600 0068788 7 m Switch Type RS-446 Addendum 3 Page 9 Elec. Life (Cycles) TABLE I ELECTRICAL RATINGS AND LIFE Power Switch 10 amps, 125 or 250 Vac (60% Power Factor
23、) 25,000 250 watt lamp load 25,000 Electronic Control (Rating Code A) 2 amperes, 250 Vac (75% Power Factor) 3 amperes, 120 Vac (75% Power Factor) 2 amperes, 24 Vdc (Resistive) 25,000 25,000 25,000 Electronic Control (Rating Code 8) Cons truc tion Power Switch Two Level Maintained Action Power Switch
24、 Momentary Action Electronic Control Two Level Maintained Action Electronic Control Momentary Action 100 mA, 24 Vdc (Resisitive) 10 mA, 5 Vdc (Resistive) 1 mA, .5 Vdc (Resistive) 100,000 100,000 100,000 i Mech. Life (Cycles) 100,000 100,000 100,000 TABLE II OPERATING CHARACTERISITICS Character ist i
25、c Force to achieve Locking action Total Plunger Travel Total Plunger Travel Force to achieve Locking action Total Plunger Travel Total Plunger Travel Value 36 oz max (9.0 Newtons max) .ZOO - + .O20 inch (5.08 - + .508 mm) ,200 - + .O20 inch (5.08 - + .508 mm) 36 oz max (9.0 Newtons max) .190 - + .O2
26、0 inch (4.826 - + ,508 mm) I .ZOO - + .O20 inch (5.08 - + .508 mm) EIA 446-3 81 W 3234600 00b8989 O W RS-446 Addendum 3 Page 10 5.0 QUALITY ASSURANCE 1 Sample Group I Number of Samples I Test Groups I 5.1 Qualification Qualification shall be in accordance with RS-446, paragraph 7.1. lification Test
27、(for multiple product approvals) shall be as follows: TABLE IV Qualification Test for Multiple Product Approval I II III * 2 Samples Only for Dimensions Qua- Sample Group Description: Group I - Alternate action.pqwer switch with neon lamp and button. Group II - Momentary action electronic control sw
28、itch with housing Type I, Terminal Type I, Rating Code 8, with Led and button. Group III - Momentary action electronic control switch with housing Type II, Terminal Type III, Rating Code A, with full screen button. 5.2 Quality Conformance Inspection Quality Conformance Inspection shall be in accorda
29、nce with RS-446, paragraph 7.4. Major visual examination characteristics shall be: TABLE V Major Characteristics for Visual Examination I Proper Assembly Physical Damage Proper Attachment of Mounting Clips Proper Termination Button Retainer Tab Damage Base Module Properly Sealed and Expoxied D ./ -.
30、 i 4 e O O EIA 446-3 BL m 3234b00 006990 7 m RS-446 Addendum 3 Page 11 - 6.0 ORDERING INFORMATION 6.1 6.2 6.3 Standard Switch (Specify the part number from 6.3 which defines the required switch) Non- St andard Switch (Provide a precise description of the desired switch. It is preferred that this be
31、done via the selection of the part number per 6.3 which defines the nearest equivalent standard switch accompanied by a description of the desired deviations from the standard switch. Any limitations on the allowable deviations must be noted here). Part Number Each switch covered by this specificati
32、on sheet shall be assigned a discrete part number. A coded system for selection of the variables is incorporated, The part number is formed as illustrated by the following example: Power Switch Example: E - Button Code Lamp Code CircuitryfAction Code Housing Code Power Switch Designation Detail Spec
33、ification Number This (generic) Standard Number USA Supervising Inspectorate I EIA 446-3 BL W 3234600 00b99L 9 W l RS-446 Addendum 3 . Page 12 Electronic Control Switch Example: , a Terminal Type Button Colors Display Code -Button Code Lamp Code Circuitry/Action Code Rating Code Housing Code Electro
34、nic Control Switch Designation O Detail Specification Number This (generic) Standard Number USA Supervising Inspectorate EIA 44b-3 1 m 3234600 00b8992 O m W J a 2 a X W a I o 5 m 3 u- a a o m Ltl 0 E 4 o e e W W -I a 2 Q X W W -I O u- I- Z O o o O ai I- o W -1 W 2 RS-446 Addendum 3 Page 13 U6 %3* PR
35、OBLEM HARD COPY EIA 446-3 1 m 3234600 00b993 2 m I . Red KS-436 Addendum 3 Page 14 Forward Voltage Intensity Dominant ,020rnA. Volts 20rnA. rncd Wavelength, nrn 2.4 1.5 626 7.0 APPLICATION INFORMATION LED APPLICATION INFORMATION Internal resistors control the LED current to a nominal 20 mA on 5 and
36、15 Vdc devices. E-V fi$HERE: R- -i+ R. Series Resistance E = Supply Voltage V, - Forward Voltage o( LED l, = Circuit Current E- For those devices without internal current limiting resistors, suitable external control of the LED current must be provided. It is recommended that a minimum of 5 Vdc open
37、 circuit voltage with an appropriate series resistance be used to drive LED devices. This minimizes the effect of temperature (current variation) on forward voltage of the LED. The example illustrates a simple dc drive circuit and the equation used to determine the value of the series resistance. TY
38、PICAL LED CHARACTERISTICS Far Example: For E 5 volts R. E 5,0 - 2.4 ,30 .oco v, 2.4V01t.6 . I, .020amp If a diodeis added in series for reverse polarity protection then: R. E - Vi,- V,.” WHERE: V,., = Forward Voltage of Protection Diode For the 5 Vdc example above the required resistance is 5 - 2.4 - 0.7 then: R.- .020 950 , - I Yellow I 2.4 I 1.4 I 585 I
