TIM foils or otherwise known as graphite sheet have been introduced in use in ACS800 R7i &
R8i industrial air-cooled modules as part of normal continuous improvements in the ACS800
product family. Benefits of using TIM foils in comparison to thermal grease are easier installa
tion and more durable heat transferring properties for longer periods of time. Durability par
ticularly improved in a cyclic application.
Where and how to use
TIM foils are used to transfer the heat generated in the IGBT’s to the heatsink. Full instruc
tions on how to install TIM foils is described in document delivered with TIM IGBT spare part
kits. In R8i module it’s possible to use a mix of IGBT’s with thermal grease and TIM foils. In
parallel connected R8i modules it’s also possible to use a mix of modules using TIM foils and
thermal grease.
Features and benefits
• 16 channels for 24 V d.c. inputs with current sinking
• Two isolated groups of 8 with voltage supervision
• Input status indicators
The input voltage range is 18 to 30 volt dc and the input current
source is 6 mA at 24 V. The inputs are divided into two individualy
isolated groups with eight channels and one voltage supervision
input in each group. Every input channel consists of current limiting
components, EMC protection components, input state indication
LED and optical isolation barrier. The process voltage supervision
input give channel error signals if the voltage disappears. The error
signal can be read through the ModuleBus.
The process voltage supervision input give channel error signals if
the voltage disappears. The error signal can be read through the
ModuleBus. The outputs are current limited and protected against
over temperature. If the outputs are overloaded the output current
wi l be limited.
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