Half-Inch Diameter Process Sealed Rotaries Series MR Distinctive Characteristics Low profile body of MRF model accommodates space limitations required for PCB mounting. For the MRA and MRK bushing mount models, the range of behind panel body depths is .323” to .669” (8.2mm to 17.0mm). Positive detent mechanism for distinct feel and audible feedback. Metal bushing and housing construction increases durability. Adjustable stopper plate allows 2–12 position settings. High contact reliability achieved by the self-cleaning contact mechanism. Break-before-make contact timing with sliding contacts in MRA and rotary contactor disk in MRF and MRK models. Interior housing seal and molded-in PC terminals, plus shaft rubber o-ring on MRF and MRK and polyamide cover on MRF model, allow cleaning after automated soldering. Exterior rubber washer and double flatted bushing on MRA and MRK give protection in splashproof applications. Actual Size NKK Switches • email: [email protected] • Phone (480) 991-0942 • Fax (480) 998-1435 • www.nkkswitches.com 05-08 Half-Inch Diameter Process Sealed Rotaries Series MR General Specifications Electrical Capacity (Resistive Load) For MRA: 250mA @ 125V AC For MRF or MRK: Other Ratings Contact Resistance: Insulation Resistance: Dielectric Strength: Mechanical Life: Electrical Life: Range of Operating Torque: Contact Timing: Indexing: Materials & Finishes Shaft: Stopper Plate: Bushing/Housing: Movable Contacts: End Contacts & Terminals: Common Contacts & Terminals: Base: Environmental Data Operating Temperature Range: Humidity: Vibration: Shock: Installation Mounting Torque: Cap Installation Force: Processing Soldering Time & Temperature: Cleaning: Standards & Certifications UL Recognition or CSA Certification: 0.4VA maximum @ 28V AC/DC maximum (Applicable Range 0.1mA ~ 0.1A @ 20mV ~ 28V) Note: Find additional explanation of operating range in Supplement section. 10 milliohms maximum for MRA; 50 milliohms maximum for MRF & MRK 100 megohms minimum @ 500V DC 1,000V AC minimum for 1 minute minimum for MRA 500V AC minimum for 1 minute minimum for MRF & MRK 30,000 operations minimum 10,000 operations minimum 0.02 ~ 0.07Nm for MRA; 0.005 ~ 0.02Nm for MRF & MRK Nonshorting (break-before-make) MRA – self-cleaning, sliding contact; MRF & MRK – self-cleaning, rotary contactor disk 30° Brass with nickel plating Steel with zinc plating for MRA & MRK; polyamide cover with stopper for MRF Zinc alloy with zinc plating Copper with silver plating for MRA; phosphor bronze with gold plating for MRF & MRK Brass with silver plating for MRA; phosphor bronze with gold plating for MRF & MRK Brass with silver plating for MRA; phosphor bronze with gold plating for MRF & MRK Diallyl phthalate for MRA; fiberglass reinforced polyamide for MRF & MRK –10°C through +70°C (+14°F through +158°F) 90 ~ 95% humidity for 96 hours @ 40°C (104°F) 10 ~ 55Hz with peak-to-peak amplitude of 1.5mm traversing the frequency range & returning in 1 minute; 3 right angled directions for 2 hours 50G (490m/s2) acceleration (tested in 3 right angled directions, with 3 shocks in each direction) .686Nm (6.08 l b • in) 19.6 ~ 29.4N (4.41 ~ 6.61 lbf) for MRA & MRK Wave Soldering for MRA: See Profile A in Supplement section. Wave Soldering for MRF & MRK: See Profile B in Supplement section. Manual Soldering for MRA: See Profile A in Supplement section. Manual Soldering for MRF & MRK: See Profile B in Supplement section. Automated cleaning recommended. Stopper plate, as well as washers for MRA & MRK, must be in place to maintain automated cleaning. See Cleaning specifications in Supplement section. MRA, MRF, & MRK models have not been tested for UL recognition or CSA certification. These switches are designed for use in a low-voltage, low-current, logic-level circuit. When used as intended in a logic-level circuit, the results do not produce hazardous energy. NKK Switches • email: [email protected] • Phone (480) 991-0942 • Fax (480) 998-1435 • www.nkkswitches.com 05-08 Series MR Half-Inch Diameter Process Sealed Rotaries TYPICAL SWITCH ORDERING EXAMPLE MR A 206 ACTUATORS & TERMINALS A POLES & CIRCUITS KNOBS COLORS A Shaft Actuated with PC Terminals 112 SP with 2-12 Positions A Plain Black For Plain Knob F Low Profile Screwdriver Actuated with PC Terminals 206 DP with 2-6 Positions B Small Color Tipped 4P with 2-3 Positions C Large Color Tipped K Low Profile Shaft Actuated with PC Terminals 403 No Code Black For Color Tipped A Black B White C Red DESCRIPTION FOR TYPICAL ORDERING EXAMPLE E Yellow MRA206-A F Green G Blue H Gray Shaft Actuated with Plain Black Knob DP with 2-6 Adjustable Positions PC Terminals ACTUATORS & TERMINALS Shaft Actuated with PC Terminals 9 12 1 6 4 5 1 12 11 12 2 10 2 (2.3) .091 (3.15) Dia .124 (10.0) .394 Shaft (3.5) .138 (0.5) .020 Thk = (0.25) .010 Terminal 1C 89 23 10 Low Profile Shaft Actuated with PC Terminals K 7 11 Low Profile Screwdriver Actuated with PC Terminals F 10 11 A MR - 12 2 12 11 10 (3.5) .138 (0.8) .031 (3.15) Dia .124 (1.0) .039 Slotted for Screwdriver (0.5) .020 Thk = (0.25) .010 Terminal 11 10 9 M R - K 1 1 29 1 C (2.3) .091 12 11 10 (3.15) Dia .124 (3.5) .138 (10.0) .394 Shaft (0.5) .020 Thk = (0.25) .010 Terminal NKK Switches • email: [email protected] • Phone (480) 991-0942 • Fax (480) 998-1435 • www.nkkswitches.com 05-08 Series MR Half-Inch Diameter Process Sealed Rotaries POLES & CIRCUITS Pole SP DP 4P Model Number of Positions Stopper Settings Number of Terminals MRA112 2–12 2, 3, 4, . . . 12 1 COM, 12 LOAD MRF112 2–12 2, 3, 4, . . . 12 1 COM, 12 LOAD MRK112 2–12 2, 3, 4, . . . 12 1 COM, 12 LOAD MRA206 2–6 2, 3, 4, 5, 6 2 COM, 12 LOAD MRF206 2–6 2, 3, 4, 5, 6 2 COM, 12 LOAD MRK206 2–6 2, 3, 4, 5, 6 2 COM, 12 LOAD MRA403 2–3 2, 3 4 COM, 12 LOAD MRF403 2–3 2, 3 4 COM, 12 LOAD MRK403 2–3 2, 3 4 COM, 12 LOAD Schematics A 1 2 3 4 5 6 7 8 9 10 11 12 A 1 B 2 3 4 5 6 A 1 1 2 3 4 5 C B 2 3 1 2 3 1 6 D 2 3 1 2 3 POSITION SETTING FOR MRA, MRF, & MRK MODELS Each switch is supplied with the stopper set for the maximum number of positions allowed for that model. Prior to installation, the desired position setting should be made. Contact factory for continuous rotation. MRF Models Remove the protective cover from the switch body. Turn the shaft counterclockwise to the extreme left by using a screwdriver. Inside the cover is a magnifying lens which would be positioned over the number which is to be the maximum position used; when the cover is then snapped into the switch, the projection beside the lens fits into the correct hole for setting the stop. 23 12 2 1C Projection 10 11 1 6 4 5 89 MRK & MRA Models Lens 7 1. 2. 3. Protective Cover MR - 12 11 10 Standard Mounting Hardware Packaged Loose with Each Switch: 1. Using the actuator knob, turn the shaft counterclockwise to the extreme left. If the shaft is not turned counterclockwise to the extreme left, proper setting cannot be achieved. At this extreme position, the white line on the knob points to the number 1 position shown on the side of the switch. 2. Remove the knob from the shaft and loosen the nut far enough to allow raising the stopper plate, plus washer(s), for resetting to the desired position. Factory Assembled: 3. Note the position numbers on the side of the switch; these correspond to the terminal numbers and stopper holes. Insert the stopper in the hole numbered for the maximum desired number of stop settings. Satisfactory switch functioning cannot be assured if the stopper plate is not properly positioned. Metal Washer (MRA) Hex Face Nut Locking Ring Lockwasher Rubber Ring (MRK) Hex Nut Stopper Plate Rubber Washer 12 2 11 10 9 9 12 M R - K 1 1 29 1 C 11 10 12 11 10 2 1 4. Tighten the nut (beveled side up) firmly against the stopper plate. 12 NKK Switches • email: [email protected] • Phone (480) 991-0942 • Fax (480) 998-1435 • www.nkkswitches.com 11 10 05-08 Series MR Half-Inch Diameter Process Sealed Rotaries TYPICAL SWITCH DIMENSIONS 1 Pole (3.0) Dia .118 4 3 2 C A 3 1 2 6 3 D 2 1 2 3 5 1 5 6 7 8 4 2 1 5 6 A B 3 B 4 2 (3.0) Dia .118 2 1 (2.3) .091 Keyway (1.0) .039 (3.15) Dia .124 (6.0) .236 (10.0) .394 (16.0) Dia .630 (17.0) .669 (5.0) .197 p 30° Ty (9.5) Dia .374 (10.0) .394 30° Ty (9.5) Dia .374 p 30° Ty (9.5) Dia .374 p MRA112 MRF • PC Terminals (0.8) .031 1 Pole D 4 21 9 1 10 5 3 6 3 21 A 2 1 A Ty p 3 21 C 1 3 4 5 21 4 3 12 1 2 15ϒ B 2 1 yp 15ϒ T yp 15ϒ T (12.6) Dia .496 (12.6) Dia .496 30ϒ 3 3 30ϒ B 2 1 5 5 (8.2) .323 3 6 6 4 9 10 11 (0.5) Typ .020 (3.5) .138 (4.2) .165 30ϒ 7 ϒ 15 ϒ 15 ϒ 15 8 (12.0) Dia .472 (14.0) Dia .551 4 Pole (0.25) Typ .010 Cover 6 7 8 (12.6) Dia .496 MRF403 1 Pole 3 4 5 3 6 3 D 2 1 9 1 10 21 3 A 2 1 A 2 1 Ty p yp 15ϒ T 1 (12.6) Dia .496 (3.5) .138 Typ 15ϒ 15ϒ B 2 1 C 2 1 (10.1) .398 (5.5) .217 3 4 3 (10.0) .394 5 4 (0.5) Typ .020 (3.15) Dia .124 B 2 1 6 5 (2.3) .091 Keyway 6 30ϒ 7 30ϒ 8 (12.0) Dia .472 4 Pole ϒ 15 ϒ 15 (0.25) Typ .010 M6 P0.75 2 Pole 1 A MRK • PC Terminals 32 2 Pole A 2 1 (3.0) Dia .118 3 9 10 11 12 A 1 4 Pole 1 (0.8) Dia Typ .031 M6 P0.75 2 Pole 3 MRA • PC Terminals yp 15ϒ T (12.6) Dia .496 (12.6) Dia .496 MRK devices are designed to be panel mounted. Installation without panel mounting will affect reliability. MRK112 FOOTPRINTS 9 4 A 11 3 2 30 1 ϒ Ty p (9.5) Dia .374 12 1 6 4 4 A 5 3 30 1 ϒ Ty p (9.5) Dia .374 6 (1.0) Dia Typ .039 1 3 3 B 2 (1.0) Dia Typ .039 2 5 2 90ϒ 10 (3.0) Typ .118 1 (3.0) Typ .118 2 3 B C A 1 D 3 2 1 30ϒ Ty p 2 Double Pole MRF206 MRK206 Single Pole MRF112 MRK112 (9.5) Dia .374 7 6 5 8 B 9 10 4 3 3 (1.0) Dia Typ .039 (0.8) Dia Typ .031 15 11 12 (12.0) Dia .472 6 p (0.8) Dia Typ .031 2 3 5 4 4 3 2 1 A ϒ Ty 1 15 6 2 1 A ϒ Ty p Four Pole MRF403 MRK403 5 (12.0) Dia .472 B 15ϒTy p 8 Four Pole MRA403 30ϒTy p (3.0) Typ .118 180ϒ 7 6 5 Double Pole MRA206 30ϒTy p Single Pole MRA112 2 1 C 3 (0.8) Dia Typ .031 1 2 3 D 1 2 (12.0) Dia .472 3 3 15 2 1 A ϒ Ty p NKK Switches • email: [email protected] • Phone (480) 991-0942 • Fax (480) 998-1435 • www.nkkswitches.com 05-08 Series MR Half-Inch Diameter Process Sealed Rotaries KNOBS A AT433 Plain Black Material: Polyacetal Color: Black only AT4103 Small Color Tipped B Base Material: Polyester Base Color: Black (19.0) Dia .748 (11.0) Dia .433 (13.0) .512 Polyamide Tip Colors: A, B, C, E, F, G, H (9.5) .374 (0.5) .020 A Color Codes: B Black C White AT4104 Large Color Tipped C Base Material: Polyester Base Color: Black (16.0) Dia .630 (9.5) Dia .374 (14.3) .563 (18.0) Dia .709 (11.0) Dia .433 Polyamide Tip Colors: A, B, C, E, F, G, H (9.5) .374 (0.5) .020 (15.8) .622 (9.5) .374 (0.5) .020 E Red F Yellow Green G H Blue Gray PANEL CUTOUTS & MAXIMUM EFFECTIVE PANEL THICKNESS Nonsealed Panel With Keyway Without Keyway (6.35) Dia .250 (6.5) .256 With Standard Hardware on Nonsealed Panel: MRA .067” (1.7mm) MRK .087” (2.2mm) Sealed Panel (5.6) .220 (6.35) Dia .250 (0.6) .024 (2.2) Dia .087 (6.2) Dia .244 Without Locking Ring on Nonsealed Panel: MRA .098” (2.5mm) MRK .118” (3.0mm) (5.4) .213 With Standard Hardware on Sealed Panel: MRK .106” (2.7mm) STANDARD MOUNTING HARDWARE AT513M Metric Hexagon Nut AT507M Metric Locking Ring AT509 Lockwasher AT535 Rubber Ring Material: Brass, nickel plating 1 for MRA; 1 for MRK Material: Steel, chromate over zinc plating 1 for MRA; 1 for MRK Material: Steel, chromate over zinc plating 1 for MRA; 1 for MRK Material: Nitrile butadiene rubber 1 for MRK (6.0) Dia .236 M6 P0.75 (8.0) .315 (6.2) Dia .244 (12.0) Dia .472 (2.0) .079 (6.4) Dia (10.2) Dia .252 .402 (9.4) Dia .370 (5.5) .217 (9.0) .354 (1.5) .059 (1.7) .067 (0.5) .020 (0.8) .031 (1.3) .051 OPTIONAL SUPPORT BRACKET AT543 Support Bracket for MRK Material: Steel with tin plating (18.0) .709 (18.0) .709 (17.5) .689 (14.9) .587 (3.8) Typ .150 (0.5) Typ .020 (14.0) .551 (0.8) Typ .031 (17.2) .677 (1.2) Dia Typ .047 A support bracket is needed when the MRK is mounted only to a PC board and does not have the bushing through a panel. NKK Switches • email: [email protected] • Phone (480) 991-0942 • Fax (480) 998-1435 • www.nkkswitches.com 05-08