JR Merritt

Master Switch

NSO-0 Rotary Switch

NSO-0 Rotary Master Switch features the same rugged design components and versatility as the NSO series of Joysticks.


• Rugged construction with brass bearings and square steel operating shaft.

• High design flexibility with combination of custom programmable contacts, detents, spring return, potentiometers and electronics.

• Precise step control with up to 7-0-7.

Output Options
  • • AC Contacts

  • • Potentiometer

  • • Encoder

  • • 4-20mA

  • • Transformer

Switch Action
  • • Spring Return

  • • Maintained

  • • Friction Brake

Mounting Style
  • • Panel (From Below)

Compatible Handles
  • • Tear Drop

  • • Pistol Grip

  • • Ball

Compatible Handles


The NSO-0 provides directional, precise proportional speed and step control of AC drives and electro-hydraulic valves. Typical applications include:

• In-plant process control

• Mining vehicles

• Conveyor and lift systems

• Steel & aluminum rolling mills

• And more


General Data

Output Options

Contacts, Potentiometer, Encoder, 4-20mA & Transformer

Handle Action

Spring Return, Friction Brake or Maintained

Handle Travel

+/- 36 degrees each axis

Max of Steps

Up to 7-0-7 or 0-16 positions

Handle Compatibility

Teardrop, pistol grip & chrome steel ball lever


10 million cycles


Aluminum body and nickel chronium yoke.

Est. Shipping Weight

4 lbs.

Est. Shipping Dimensions

10 in. x 10 in. x 10 in.

Mounting Data

Mounting Style

Panel (from below)

Mounting Footprint

2.84" x 2.84" 
See literature for additional mounting specifications

Environmental Data

IP Rating

Up to IP66 / Nema 4x (with cast enclosure & round nameplate)

Operating Temperature

-13 to +158 degrees F [-25 to +70 degrees C]

Storage Temperature

-40 to +158 degrees F [-40 to +70 degrees C]

Electrical Data

Contact Specifications

Switch Type: 
Double Pole Snap-In Contact Blocks 

Max. Number: 
Up to 10 contact blocks (20 circuits) 

Max. Switching Capacity: 
Making - 100 amps Breaking - (0.7PF) 240V 80 amps 

Rating (AC): 
Continuous 16 amps @ 240V 
Resistive 8 amps @ 240V 
Inductive 6 amps @ 240V 

Captive Saddle Clamp 

Max. Wire Size: 
12 AWG

Additional Specifications

Reference product literature for additional specifications

Technical Drawings



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