M4RTU/M4 I/O User’s Guide
83
UPGRADING RAM
AND FLASH EEPROM
OVERVIEW
If the M4RTU/M4 I/O does not have a “1 MB RAM Installed” sticker, you can expand the M4RTU/M4 I/O RAM
from 256 KB to 1 MB. You can also expand the flash EEPROM from 256 KB to 1 MB. To do such an upgrade,
it is necessary to remove and disassemble the M4RTU/M4 I/O base unit to access the processor board where
the RAM and flash EEPROM chips are located. You can also use this process to upgrade the processor board
with flash chips containing new enhanced boot loaders supporting new primary host communication hardware
(e.g., fiber or Ethernet).
To disassemble the M4RTU/M4 I/O, follow these instructions:
1.
Turn off the power to the M4RTU/M4 I/O.
2.
Disconnect the incoming electrical power from the power supply.
3.
Remove the four screws located on the top cover of the unit. Take off the top cover. Disconnect the field
wiring plug connectors.
4.
Remove any communication port connectors and/or M4RTUXCAB cables.
* Do not change this jumper.
Figure E-1: Locations of Jumpers and Chips on the M4RTU/M4 I/O
APPENDIX E
Summary of Contents for Modular M4RTU
Page 6: ...6 M4RTU M4 I O User s Guide TABLE OF CONTENTS...
Page 74: ...74 M4RTU M4 I O User s Guide FIELD WIRING...
Page 80: ...80 M4RTU M4 I O User s Guide PRODUCT SPECIFICATIONS...
Page 82: ...82 M4RTU M4 I O User s Guide ADDRESS JUMPER CONFIGURATION...
Page 86: ...86 M4RTU M4 I O User s Guide UPGRADING RAM AND FLASH EEPROM...
Page 89: ...M4RTU M4 I O User s Guide 89 WORKSHEETS Figure F 3 M4RTUX I O Extender I O Module Worksheet...
Page 91: ...M4RTU M4 I O User s Guide 91 WORKSHEETS Figure F 5 Field Wiring Worksheet Example 2...
Page 94: ...94 M4RTU M4 I O User s Guide WORKSHEETS...
