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Teledyne API - Model T200H/T200M Operation Manual
7.1.4.3. Relay Board and Status LEDs
07270D DCN7141
The most important status LED on the relay board is the red I
labeled D1, which indicates the health of the I
left-most in LED row 1 in the center of the relay board when looking at the electronic
components. If D1 is blinking, then the other LEDs can be used in conjunction with the
DIAG menu I/O functions to test hardware functionality by manually switching devices
on and off and watching the corresponding LED go on or off.
Figure 7-4 illustrates the relay board layout including the two rows of LEDs,
Table 7-2 lists the individual LED functions, and the menu tree below shows how to
access the manual control of the I/O functions. Note that only some or the LEDs may be
functional in your analyzer model; the relay board layout is conceptualized for spare,
future functionality and is also common to many of the T-series analyzers.
Figure 7-4:
2
C communications bus. This LED is the
Relay Board PCA
Troubleshooting & Service
2
C Bus watch-dog LED,
221
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