7.13.3
Other Diagnostic Monitors
•
Channel configuration at startup and at online load time is verified and a diagnostic is issued when an error occurs.
•
Cold Junction sensors are monitored for healthy range and are marked unhealthy and a diagnostic alarm is issued when
they are out of range.
•
Factory calibration data is validated and a diagnostic alarm is issued if the data is missing or corrupted (indicating
product is not running with applied factory calibration).
7.14
Replacement
Attention
Replacement of the terminal board requires full reconfiguration of the changed
component using the ToolboxST application. For this reason, it is generally preferable
to replace only the I/O pack unless the terminal board is known to be the point of
failure.
7.14.1
Replace YUAA I/O Pack with Another YUAA I/O Pack
YUAA I/O packs are hot-swappable, where a pull and replace may occur with power supplied to the power connector. It is
online repairable, with no IONet disturbance due to removal or insertion of the I/O pack. It also supports auto-reconfiguration
for I/O pack replacement (not terminal board replacement).
➢
➢
To replace a YUAA I/O pack
1.
Follow all applicable site safety procedures and the Cautions and Warnings published in the chapter
Maintenance and
Replacement
.
2.
Verify that the replacement I/O pack is compatible with one being replaced by comparing the model numbers.
3.
Remove the power connector from the I/O pack.
4.
Unplug the IONet cable(s) from the I/O pack, and mark the positions of the removed cables (if using dual IONets).
5.
Remove the two mounting screws that hold the I/O pack onto the terminal board.
6.
Unplug the I/O pack.
7.
Plug in the replacement I/O pack. Make sure the I/O pack connector is fully seated on all sides, then properly tighten the
mounting screws to 2.15 nm (19 in lb) torque to firmly hold the new I/O pack onto the terminal board.
8.
Plug the Ethernet and power cables back into the I/O pack.
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