MRK112-BC-RO NKK Switches, MRK112-BC-RO Datasheet - Page 4

• Manufacturer Part Number: MRK112-BC-RO
• Description: Rotary Switches LO PRO SHFT 2-12 POS RED TIPPED
• Manufacturer: NKK Switches
• Type: Half-Inch Process Sealed Rotariesr

Specifications of MRK112-BC-RO

• Number Of Positions: 2 to 12
• Number Of Poles Per Deck: 1
• Number Of Decks: 1
• Index Angle: 30 deg
• Contact Style: Non Shorting
• Contact Form: SP
• Mounting Type: Panel
• Color: Black, Red
• Contact Material: Phosphor Bronze
• Contact Plating: Gold
• Dielectric Strength: 500 VoltsAC
• Voltage Rating: 28 VoltsAC/DC
• Current Rating: 0.4 Volt-Amp at 28 VoltsAC/DC
• Actuator: Shaft Actuated, Low Profile with Knob
• Cap Color: Black, Red
• Contact Rating: 0.4 Volt-Amp at 28 VoltsAC/DC
• Termination Style: PC Terminals
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 633-MRK112-BC MRK112-BC

Half-Inch Diameter Process Sealed Rotaries
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.
1. Remove the protective cover from the switch body.
2. Turn the shaft counterclockwise to the extreme left by using a screwdriver.
3. Inside the cover is a magnifying lens which would be positioned over the
1. Using the actuator knob, turn the shaft
2. Remove the knob from the shaft and
3. Note the position numbers on the side
4. Tighten the nut (beveled side up) firmly
Pole
DP
SP
4P
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.
counterclockwise to the extreme left. If
the shaft is not turned counterclockwise
to the extreme left, proper setting can-
not be achieved. At this extreme posi-
tion, the white line on the knob points
to the number 1 position shown on the
side of the switch.
loosen the nut far enough to allow rais-
ing the stopper plate, plus washer(s),
for resetting to the desired position.
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 func-
tioning cannot be assured if the stopper
plate is not properly positioned.
against the stopper plate.
MRA112
MRA206
MRA403
MRK112
MRK206
MRK403
MRF112
MRF206
MRF403
Model
MRK & MRA Models
Number of Positions
POSITION SETTING FOR MRA, MRF, & MRK MODELS
2–12
2–12
2–12
2–6
2–6
2–6
2–3
2–3
2–3
MRF Models
Stopper Settings
2, 3, 4, . . . 12
2, 3, 4, . . . 12
2, 3, 4, . . . 12
2, 3, 4, 5, 6
2, 3, 4, 5, 6
2, 3, 4, 5, 6
POLES & CIRCUITS
2, 3
2, 3
2, 3
1 C
11
12
www.nkk.com
Number of Terminals
1 COM, 12 LOAD
1 COM, 12 LOAD
1 COM, 12 LOAD
2 COM, 12 LOAD
2 COM, 12 LOAD
2 COM, 12 LOAD
4 COM, 12 LOAD
4 COM, 12 LOAD
4 COM, 12 LOAD
Packaged Loose with Each Switch:
Standard Mounting Hardware
Metal Washer (MRA)
Factory Assembled:
Rubber Ring (MRK)
Rubber Washer
Hex Face Nut
Stopper Plate
Locking Ring
Lockwasher
Hex Nut
Protective Cover
1 2 3 4 5 6 7 8 9 10 11 12
1 2 3 4 5 6 1
1 2 3 1
A
Series MR
1 C
A
12
Schematics
2 3 1
B
A
Lens
Projection
1
2 3 4 5 6
2 3 1
C
12
11
B
9
2 3
D
G19
G