Joystick safety critical functions
For a system to operate safely it must be able to differentiate between commanded and uncommanded
inputs. Take steps to detect and manage joystick and system failures that may cause an erroneous
output.
For safety critical functions Danfoss recommends you use an independent momentary action system
enable switch. You can incorporate this switch into the joystick as an operator presence switch or can be
a separate foot or hand operated momentary switch. Disable all joystick functions that the joystick
controls when this switch is released.
Ensure the control system looks for the appropriate system enable switch input before the joystick is
displaced from its neutral position. Enable functions only after receiving this input.
Applications using CAN joysticks should continuously monitor for the presence of the CAN messages on
periodic basis. Messages are to be checked frequently enough for the system or operator to react if the
CAN messages lose priority or are no longer received.
Technical Information
JS120 Single Axis Fingertip Joystick
Product installation
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©
Danfoss | December 2016
520L0877 | BC00000075en-US0303