2. Transportation, Storage and Installation
2-31
TI 32P01J10-01EN
Mar. 29, 2019-00
Conventions
The following shows the common abbreviations used and their explanations.
Abbreviations Explanations
SCU Safety Control Unit
NIU Node Interface Unit (for N-IO)
IOBP I/O Base Plate
IOBP_IS I/O Base Plate for Intrinsic Safety explosion protection
NIO node Consists of NIU and IOBP/IOBP_IS.
Unit Unit of 19 inch rack. 1 Unit = 44.45 mm
Side One of the front and the back of a cabinet. (e.g., side, one side)
Example of Mounting Multiple SCUs for N-IO in a Cabinet
Temperature conditions
In this example, the ambient temperature is assumed to be the following.
Cabinet ambient temperature 40 °C or less
Maximum numbers of units that can be mounted
Type Model Number of units that can be mounted per side
SCU
S2SC70D
S2SC70S
(Except for S2SC70-S)
Up to 4
Heat-generating devices other than the above shall not be mounted in the cabinet.
Mounting conditions
• SCU shall be mounted with a 3-unit or more space from the top-shelf mounting position of
the cabinet.
• A 1-unit or more space shall be provided between the fan unit of a SCU and the SCU on the
bottom shelf.
• Devices that block the convective air ow from the fan unit of a SCU or door fans to each
module shall not be mounted.
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