Toshiba TR PMIU, User Manual, Page: 5 / 182

General precautions
Purpose that TR series can be used
All TR series are a general-purpose industrial products. It is a system component and is used in conjunction
with other items of industrial equipment such as PLCs, Adjustable Speed Drives (such as inverter), etc. TR
series are designed and produced carefully enough, but it is necessary to note it when using it for the following
usages.
・ TR series is not designed to be used for the systems which can endanger human life (equipment used to
medical treatments, such as life-support system, surgical equipment, etc). Do not use TR series for those
usages.
・ If you intend to use TR series for a special application which involves human life or has great influence on
the public function (the system that needs very advanced reliability or safety-critical system such as
control/safety system of nuclear power plant or nuclear facility, the operation control system of mass
transportation system, the equipment/ system related to aerospace, the equipment/system used in very
severe environment), please consult us.
These system needs special consideration (fail safe design, fool proof design, redundant design, etc.) for the
design, operation, and the maintenance.
For the safety design of your system/machine
Safety is the most important for all systems/machine. Even if it is used on the assumed worst condition, it is
necessary to prevent the system/machine from endangering the person. To protect the user, the third party,
and the property, please note following items at the system design.
・ Protect user and third party from a hazardous locations and the part (movable part, sharp part, where
voltage or heat is applied, etc.) as much as possible with cover and safety devices.
・ When carelessly resetting systems/machine after emergency stops, movable part might begin to move
suddenly. When network communications is used, there is a possibility that data and the command become
improper because of a noise and an incorrect operation, or the communication is not done for some
reasons. Measures not to become a hazardous situation are necessary even if these occur. It is necessary
to design interlock that all the movable parts are locked until safety is confirmed, and control shifts to a
local mode when communication device is not possible to communicate, etc.
・ Never use TR units to perform emergency stop mechanism. Compose the safety system of not relying on
TR series. Even if TR series or a part of the system/device break down, system/machine should be able to
be stopped safely.
・ Even if the system/machine has the improvement and modification, do not let the above-mentioned
function be lost.