User manual

For additional information, refer to NEMA ICS 1.1 (latest edition), “Safety Guidelines for the Application,

Installation, and Maintenance of Solid State Control”.

Do not use the unit as the only means of control for critical system functions such as motor start/stop or power

disconnect.

Do not use the unit as the only notification device for critical alarms, such as device overheating or

overcurrent.

Do not use the unit with aircraft control devices, aerospace equipment, central trunk data transmission

(communication) devices, nuclear power control devices, or medical life support equipment, due to the

reliability requirements of these industries.

In the event of backlight or other unit failure, it may be difficult or impossible to identify a function.

Emergency stop, fuel shutoff, or any function that may present a danger if not immediately executed must be

provided independently of the unit. In addition, the machine control system design should take into account

the possibility of the backlight failing and the operator being unable to control the machine, or making errors

in the control of the machine.

WARNING

LOSS OF CONTROL

• The designer of any control scheme must consider the potential failure modes of control paths

and, for certain critical control functions, provide a means to achieve a safe state during and

after a path failure. Examples of critical control functions are emergency stop and overtravel

stop.

• Separate or redundant control paths must be provided for critical control functions.

• System control paths may include communication links. Consideration must be given to the

implications of unanticipated transmission delays or failures of the link.

• Each implementation of the Magelis XBT OT must be individually and thoroughly tested for

proper operation before being placed into service. The machine control system design should

take into account the possibility of the backlight failing and the operator being unable to control

the machine, or making errors in the control of the machine

Failure to follow these instructions can result in death, serious injury, or equipment damage.