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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
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.
Verify that the replacement I/O pack is compatible with one being replaced by comparing the model numbers.
2.
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).
Remove the two mounting screws that hold the I/O pack onto the terminal board.
5.
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.
Plug the Ethernet and power cables back into the I/O pack.
8.
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GEH-6855_Vol_II
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.
GEH-6855_Vol_II Mark VIeS Functional Safety Systems Volume II
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