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4 ControlLogix® Controller and Memory Board
Replace a Suspected Failed Controller
1. Cycle the power to the
chassis.
ControlLogix
CAT. NO./SERIES
1756-M...
ControlLogix
CAT. NO./SERIES
1756-L...
4. Install the battery.
series A
Publication
1756-IN101J-EN-P - November 2004
2. Make sure the OK LED is solid red.
If the OK LED is not solid red, the
controller does not require
replacement.
3. Match the catalog numbers of the
controllers and memory boards.
Catalog number of the memory board,
if one is installed
Catalog number of the controller
series B
42523
COMPACT
FLASH
1-DCD
DSR-6
2-RXD
RTS-7
3-TXD
CTS-8
4-DTR
N/C-9
5-GND
RS232
1
To
Insert 1
2
To Eject
1 + 2
1
2
UP
BATTERY
DATE
1
2
BATTERY
PORT
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