Rockwell Automation 1771-DB BASIC MODULE - Manual (Page 59)

Chapter
Installing and Replacing Components 3
3 -7
Use a chip insertion tool with memory modules that have no carrier.
SKT2
(PROMs without Carriers)
20373–M
Important: Make sure you line up the
index mark on the PROM with the index
mark on the socket.
Index Mark
Important: Make sure that none of
the pins on the PROM are bent and
that all the pins are aligned in the
socket correctly.
6. Reassemble the BASIC module. If you need further instructions to
complete this step, see page 3 -11.
7. Set jumper JW2 to configure the BASIC module for the circuitry of
your memory module. If you have an Allen-Bradley memory module
refer to the table on page 3 -5. If not, refer to the Memory Module
Configuration Jumper on page 1 -4.
8. Set jumper JW3 (CPU Speed Select Jumper, page 1 -5) to set the
speed of your BASIC module CPU. If you have an Allen-Bradley
memory module refer to the table on page 3 -5. If not set jumper
JW3 according to the speed of your memory module:
Memory speed JW3 setting
150 ns – 91 ns
Normal
90 ns or faster
Turbo
slower than 150 ns not allowed
9. Replace the BASIC module into the I/O chassis. If you need further
instructions to complete this step, see page 1 -12.