User manual - ATR121 - 7
tation systems.
Only qualified personnel should be allowed to use device
and/or service it and only in accordance to technical data
listed in this manual.
Do not dismantle/modify/repair any internal component.
Device must be installed and can operate only within the
allowed environmental conditions. Overheating may lead
to risk of fire and can shorten the lifecycle of electronic
components.
1.1
Organization of safety notices
Safety notices in this manual are organized as follows:
Safety notice Description
Danger!
Disregarding these safety guidelines and
notices can be life-threatening.
Warning!
Disregarding these safety guidelines
and notices can result in severe injury or
substantial damage to property.
Information!
This information is important for preventing
errors.
1.2
Safety Precautions
This product is UL listed as open type process
control equipment.
Danger!
If the output relays are used past their life
expectancy, contact fusing or burning may
occasionally occur.
Always consider the application conditions and
use the output relays within their rated load and
electrical life expectancy. The life expectancy
of output relays varies considerably with the
output load and switching conditions.
Danger!
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