2.2.3 Precautions during Installation
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T
erminal Board Installation Direction
Install the DIN rail mountable terminal board in the direction shown in the following figure.
When installing the SBD2D in direction b or direction c, ensure that the following conditions
are met.
•
When the ambient temperature is less than 60 deg. C, the total current of the loads of all
channels must be lower than the specified limit (8 A).
• When the ambient temperature is at 70 deg. C, the total current of the loads of all chan-
nels must be lower than 6 A.
• When the ambient temperature is between 60 deg. C and 70 deg. C, more precise calcu-
lation for current limit can be figured out by reducing 0.2 A from 8 A per 1 degree incre-
ment from 60 deg. C.
DIN rail
Direction a Direction b Direction c
Figure 2.2.3-1 Terminal Board Installation Direction
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Restrictions When Installing the SBT4D
T
o maintain reference junction compensation accuracy, the terminal board must not be affec-
ted by ambient heat. When installing a heat source nearby, install the heat source above the
terminal board and terminal board wiring. If you must install the heat source next to or below
the terminal board, install a heat shield.
The reference junction compensation is accurate when the ambient temperature is stable. If
the ambient temperature changes, the measurements of the reference junction compensation
accuracy will be incorrect until the temperature becomes stable again.
<2.2 Installing a Terminal Board> 2-10
IM 32Q06C10-31E 4th Edition : Jan.30,2015-00
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