WM-A10 - Thumb Throttle and Switch Unit

Product Brand: Williams Controls

The WM-A10 provides an electronic thumb throttle and switch solution for a wide range of applications including All-Terrain Vehicles (ATV) or Personal Recreational Vehicles (PRV)


  • Non-contacting throttle with Hall-effect switches
  • Dual-redundant-output throttle signals
  • Up to two return-to-center, 3-position switches
  • Safety assured: each throttle circuit has dedicated 5V and ground supply connections
  • Switch circuits powered by third set of 5V and ground supply connections
  • Up to 4 LEDs for driver indication
  • Integrated connector or flying lead
  • Environmentally sealed to IP67
  • Custom tooling service for a wide range of applications

The WM-A10 provides an electronic thumb throttle and switch solution for a wide range of applications including All-Terrain Vehicles (ATV) or Personal Recreational Vehicles (PRV).

The throttle utilises two fully-independent non-contacting Hall-effect sensors to provide a dual-redundant-output architecture, with the second signal being a fixed relation to the main drive signal. A vehicle’s Electronic Control Unit (ECU) can therefore perform comparisons between the throttle’s two outputs, in order to ensure it is operating correctly. Both outputs are linear and are directly proportional to absolute sensor shaft rotation. In addition, each throttle sensor circuit has its own 5V and ground supply connections, thereby implementing a truly dual-redundant system.

Non-contacting sensing is also employed in design of the switches, which are momentary, center-off types and typically used to operate functions such as transmission shifting. Each switch has two outputs which are both at 5V in the center position, with one or the other switching to ground dependent left or right operations. To provide a further level of safety, the switch circuits have a third set of 5V and ground supply connections.

The design of the WM-A10 means it is exceptionally robust against many different environmental conditions, including: water immersion, pressure washing, salt spray, a variety of chemicals, dust and mud; while connection to the unit is via an industry-stand integrated connector or flying lead.

In addition to the control inputs, the throttle unit can house up to four LEDs, which can be used to indicate the status of vehicle functions to the driver.

The unit illustrated above is based on a customer-specific design, but Curtiss-Wright’s teams of experienced engineers are on hand to provide a custom service to meet the individual requirements of vehicle OEMs. Please contact your Curtiss-Wright representative for further details.

WM-A10 - Thumb Throttle and Switch Unit
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