Rockwell Automation T71xx Regent+Plus Processor Modules 110 VAC, 220/240VAC and 24VDC - Manual (Page 11)

Processor Modules (T7110, 11, 12, 20, 21, and 22)
P D - 7 0 0 0 S e p - 0 4 (Issue 1)
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Remove the new U42 EPROM from its packaging and inspect its
pins to make sure they are not bent.
Find the pin one index point (or notch) on the new EPROM.
Position the new EPROM in the chip socket so that the pin one
index point is facing the U42 label on the printed circuit board.
Carefully insert the new EPROM into the chip socket. It is often
easiest to align and partially insert the pins on one side of the chip
first, then align the other pins on the other side, and press the
EPROM carefully into place.
Before pressing the chip into place, check that all pins are properly
aligned in their respective holes. If the pins are not properly
aligned, carefully remove the chip and repeat the previous step.
Gently press the EPROM into the chip socket. As the EPROM is
pressed home the chip socket’s retaining clips will rotate inward to
secure the EPROM.
After fully inserting the EPROM, make a final check to ensure that
the pins are not bent, the pins are fully engaged and the EPROM
orientation is correct. If any pins are bent or the EPROM is not
oriented correctly, remove the EPROM and reinstall it.
If you install and apply power to a module with an EPROM
installed backwards the EPROM may be damaged. When the
EPROM is inserted backwards, power will be applied to incorrect
pins of the EPROM. If this happens, do not remove and re-insert
the same EPROM. Replace the incorrectly positioned EPROM
with a new EPROM.
Repeat the above steps for the U43 EPROM.
After installing the two new EPROMs in the main processor board,
rotate (or flip) the main processor board to one side to expose the
I/O processor board.
Locate the U19 EPROM on the I/O processor board and use the
steps described above to remove the old EPROM and install the
new EPROM.
Important!