c oles quality open frame instrument rotary switch provides low contact resistance (.005w), very high contact reliability, smooth action with positive positioning, precision design, and trouble free construction of glass epoxy insulators and silver conductors. rated for 100,000 cycles minimum, the contact mechanism is a bifurcated brush, promising 100% redundancy and avoidance of contact failure. in addition, it has been designed and manufactured to meet or exceed all applicable requirements of mil-s-3786, mil-t-945, qq-p416, mil-s-13282, mil-std-202, mil-a-8625, and mil-std-167. all open frame series switches are available pre-wired to terminal boards or connectors. coles open frame switches are ideal for high voltage, high current, and low resistance applications. open frame series open frame instrument switches iso9001 certified
open frame series open frame series open frame instrument switches 2650 south croddy way p.o. box 25063 santa ana, california 92799-5063 usa phone 714.556.3100 sales fax 714.241.9061 www.cole-switches.com iso9001 certified open frame series/page 2 notes: open frame - .250 shaft dia., 2.25 inch. square deck, (see page 4). open frame - .250 shaft dia., 2.75 inch. square deck, (see page 3). open frame 2.25 inch. square deck (see page 4) open frame 2.75 inch. square deck (see page 3) very low electrical resistance, very stable electrical contacts, 64 positions max
open frame series open frame series open frame instrument switches 2650 south croddy way p.o. box 25063 santa ana, california 92799-5063 usa phone 714.556.3100 sales fax 714.241.9061 www.cole-switches.com iso9001 certified open frame series/page 3 very low electrical resistance, very stable electrical contacts, 64 positions max features * solid silver and silver plated conductors. * bifurcated brush contacts for high reliability. * very low resistance (.005w). * 13+ decks as special order. * high current capacity. * up to 12 decks as standard. * user adjustable stop. * 8 poles maximum available. * pre-wired option for ease of installation. * 64 positions maximum available. * glass epoxy as strong stable insulator. contact silver detail rear view front view side view
open frame series open frame series open frame instrument switches 2650 south croddy way p.o. box 25063 santa ana, california 92799-5063 usa phone 714.556.3100 sales fax 714.241.9061 www.cole-switches.com iso9001 certified terminal board side view mounting plate with terminal board - front view front view side view rear view ordering information sample code switch shown in the sample code is a 2-1/4 square, 2 poles per deck, shorting, 11-1/4 detent, 31 positions per pole, 3 decks, adjustable stop, terminals to rear. options the following options can be added to the standard switch. when ordering, simply add the letters after the basic part number. a = adjustable stops. d = screwdriver slot. f = fixed stop between the frst and last position on a full- turn switch. g = rfi-emi shielding. l = low level. p = panel and shaft seals. s = shorting (available in all confgurations). y = optional .432 non-turn washer. screw terminals available (contact factory for special part number). open frame series/page 4
open frame series open frame series open frame instrument switches 2650 south croddy way p.o. box 25063 santa ana, california 92799-5063 usa phone 714.556.3100 sales fax 714.241.9061 www.cole-switches.com iso9001 certified instrument series switch selection guide - positions available for maximum rotation notes: series size: 14=1-1/2 square. 16=1-3/4 square. ns=non-shorting. 22=2-1/4 square. 26=2-3/4 square. s=shorting. open frame series/page 5 ? position listed are maximum available, full rotation, within confguration parameters. ? non-shorting contacts will be furnished unless other - wise specifed. ? refer to series confguration specifcations for complete details and proper identifcation. ? larger deck sizes, detent spacing variation available for special applications.
open frame series open frame series open frame instrument switches 2650 south croddy way p.o. box 25063 santa ana, california 92799-5063 usa phone 714.556.3100 sales fax 714.241.9061 www.cole-switches.com iso9001 certified simultaneous paralleling switch *where it is required to have no open circulating between positions, including the independent contact when the switch is rotated, use these shorting basic i.d. numbers. function: the typical schematic left, is 24 positions, 15 degrees, 23 of the positions are shorted together by 23 fnger brushes connected in common to one collector ring. the 24th posi - tion is contacted by an entirely separate fnger brush which is connected to a separate collector ring. as the switch is rotated, the separate brush makes contact with each switch position while simultaneously all other positions are shorted together. no second one pole deck is required to perform this function, thus overall length is reduced and wiring time costs are reduced. one piece finger brushes: no mechanically or solder joined sections in the solid, stress- free one piece fnger brush assembly. solid fne silver fnger brush contacts, stator contacts and col - lector rings. binary coding or position selection: paralleling decks singly or in tandem are used for binary coding or position selection allowing minimum amount of interconnecting circuit and remote control. application examples: 1) low voltage signal testing. 2) multiple circuit cable testing, both continuity and voltage breakdown. 3) current testing circuits to ground or common. 4) solid state testing where it is desirable to connect all circuits to eliminate transients causing erroneous test data. 5) one or more paralleling decks can be included in a standard multi-deck switch to meet all types of requirements. simultaneous paralleling open frame series/page 6
open frame series open frame series open frame instrument switches 2650 south croddy way p.o. box 25063 santa ana, california 92799-5063 usa phone 714.556.3100 sales fax 714.241.9061 www.cole-switches.com iso9001 certified progressively paralleling (shorting) switch maximum rotation: 180 degrees. function: the one piece fnger brush assembly progressively connects (or shorts) together the switch positions sequentially as the switch is rotated. one piece finger brushes: no mechanically or solder joined section in the solid, stress- free one piece fnger brush assembly. solid fne silver fnger brush contacts, stator contacts and collector rings. application examples: this type of switch is utilized for paralleling capacitors in capaci - tance decade units, for varying capacity values in multiple fxed frequency generators, receivers, transmitters, etc. it is used in many resistance bridge, strain gage and transducer applications, syncro systems, remote controlling, and computer systems. one or more progressively parallel - ing decks can be included in a standard multi-deck switch to meet all types of requirements, providing it does not rotate over 180 degrees. notes current rating: 1 1/2 amp with standard fnger brush. resistance: 0.005 ohms. progressively paralleling open frame series/page 7
open frame series open frame series open frame instrument switches 2650 south croddy way p.o. box 25063 santa ana, california 92799-5063 usa phone 714.556.3100 sales fax 714.241.9061 www.cole-switches.com iso9001 certified specification unit value note: military specifications mil-s-3786 continuous (non-switching) current carrying capacity amps 15 at 28 vdc, with max. contact temperature rise of 20 ? c switching current capacity at 28 vdc resistive amps 5 switching current capacity at 115 vac resistive amps 5 switching current capacity at 28 vdc inductive (2.8 h.) amps 3 switching current capacity at 28 vdc lamp load amps 3 low level max. capacity ma 10 at 30 millivolts dc max. dielectric strength, min. vrms 1,500 contact resistance, max. (initial) milliohms (m ?) 0.5 contact resistance, max. (after life) milliohms (m ?) 20 insulation resistance, min. (initial) megaohms (m ?) 100,000 at 100 va c insulation resistance, min. (after life) megaohms (m ?) 50,000 at 100 va c switching life, min cycles 25,000 at rated loads, sea-level, 25 ? c, 68% relative humidity mechanical life, min cycles 100,000 rotational torque, min. inch pounds 24 rotational torque, max. inch pounds 80 stop strength, max. inch pounds 50 mounting ferrule strength inch pounds n/a w ithstanding shaft push force pounds 200 weight grams 140 2 inch. square molded parts glass epoxy- mil p 18177 contact surfaces pure, solid silver gold plate is an option altitude feet 80,000 typical pressure at 80,000 feet: 0.4 psi temperature, min. degrees celsius -55 temperature, max. degrees celsius 125 vibration tested meets per mil-s-3786, mil-std-202, method 204, test condition "b", vibration grade 3 impact shock, medium meets mil-std 202; method 213 impact shock, high meets at 100g, mil-std 202, method 207 moisture resistant no salt spray resistant no explosion proof no immersion no emi/rfi meets mil-s-3786, 2 ohms shaft to ground max. capacitance, min picofarad (pf) 2-1/2 measured between contacts and between ring and contacts capacitance, max picofarad (pf) 4 measured between contacts and between ring and contacts open frame technical data at atmospheric pressure with 85 ? c and at reduced barometric pressure with 25 ? c open frame series/page 8
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