Specifications Common to All Basic I/O Units
4-2-2
TS Indicator
The TS indicator is a 2-color LED. The color of the TS indicator, and whether it
is lit or not, indicate the following:
Indicator
Color
TS
Green
Red
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Note The meanings of the TS indicator for Communications Units, differ
from those for I/O Units. For details, refer to page 200.
State
Lit
Normal communications
Lit
I/O Unit interface error
Not lit
Under initialization, or no power supplied
Section 4-2
Meaning
43