Rockwell Automation T71xx Regent+Plus Processor Modules 110 VAC, 220/240VAC and 24VDC - Manual (Page 9)

Processor Modules (T7110, 11, 12, 20, 21, and 22)
P D - 7 0 0 0 S e p - 0 4 (Issue 1)
9
EPROM Replacement
EPROM replacement is necessary only when upgrading to a new
version of the TRIOS operating system.
Because processor modules with different EPROM sets cannot
operate together in the same system, replacing EPROMs in an
installed system will require shutting down the entire Regent
system.
To prevent damage to module components when replacing
EPROMs always follow proper electrostatic discharge prevention
procedures during disassembly and handling. This includes the use
of ESD mats and wrist straps.
Module Removal
Loosen the retaining screw at the top of the module. Open the two
module release levers by rotating them outward (toward you).
Carefully pull the module out of the controller chassis.
Replacing EPROMs
The three EPROMs in each module are labeled U42 and U43
(main processor) and U19 (I/O processor). Figure 4 shows the
locations of the EPROMs on each printed circuit board.
Important!
Important!