Proface LT4300M - 5.7 Modular HMI + Control" - Manual (Page 7)

LT-4201TM/4301TM Installation Guide
7
English
1 For additional information, refer to NEMA ICS 1.1 (latest edition), "Safety Guidelines for
the Application, Installation, and Maintenance of Solid State Control" and to NEMA ICS 7.1
(latest edition), "Safety Standards for Construction and Guide for Selection, Installation and
Operation of Adjustable-Speed Drive Systems" or their equivalent governing your particular
location.
WARNING
LOSS OF CONTROL
 Consider the potential failure modes of control paths in the machine control system
design, such as:
 The possibility of backlight failure,
 Unanticipated link transmission delays or failures,
 The operator being unable to control the machine,
 The operator making errors in the control of the machine.
 Design outside the LT operations such as emergency stop, safety circuits, interlocks
that operate with opposing actions such as clockwise/counterclockwise rotation, and
circuits that prevent machine damage with positioning limits on top, bottom, and
movement.
 For important operations handled by switches, design your system to use a separate
hardware device. This is to reduce the occurrence of incorrect outputs or malfunctions.
 Observe all accident prevention regulations and local safety guidelines. 1
 Test individually and thoroughly each implementation of the equipment for correct
operation before service.
Failure to follow these instructions can result in death, serious injury, or equipment
damage.