I got the Power!...
SpecialK87 said:
I have to replace batteries in multiple types of processors. Maybe this is a stupid question but do I need to remove power from the processor before replacing the battery? I have:
ControlLogix 1756-L61
CompactLogix 1769-L35e
MicroLogix 1100
SLC 5/05
ControlLogix L6x controllers:-
The official battery to use (1756-BA1 or -BA2) depends on which Series L6 controller you have...
36330 - Replacement Battery Options for 1756-L6x Processors
Access Level: TechConnect
The battery for any of the ControlLogix controllers may be fitted or replaced while the controller is powered ON...
44418 - ControlLogix: Battery replacement Guideline
Access Level: TechConnect
CompactLogix 1769 L3 controllers:-
You may also fit or replace the 1769-BA battery to the CompactLogix L3 controllers while powered ON...
38754 - Installing/replacing a 1769-BA battery in a CompactLogix controller
Access Level: TechConnect
NOTE: The technote officially states that the 17
47-BA is a different battery to the CompactLogix 17
69-BA and may damage the CompactLogix processor - OK Rockwell?
MicroLogix 1100 controllers:-
I do not have a specific technote to link to for the MicroLogix 1100 controller, and while the battery installation instructions in the User Manual do not mentioned the power status while replacing the 1763-BA battery, I do know that you may also fit or replace the battery while the controller is powered ON. The same can be said for the 1747-BA battery for the MicroLogix 1400, for which I do have a technote to link to and where you are advised to replace the battery while the controller is powered ON, so as not to lose the program in memory...
470370 - Battery Information on the MicroLogix 1400 controller
Access Level: TechConnect
SLC 5/05 controller:-
The original SLC 5/01 and 5/02 controllers have their battery compartment under the front cover and above the communications port. As the battery is accessible without removing the SLC processor module from the chassis, the 1747-BA battery may be removed or replaced while the controller is powered ON.
For the SLC 5/03, 5/04 and 5/05 controllers, there was a second communications port added to the module under the front cover. As a result, the battery compartment was moved to the side of the module's printed circuit board. This now means that to access the battery, the module must be removed from the chassis. Which also means that the controller must be powered OFF before removal. To be clear though, the only reason you must power these controllers OFF before fitting or replacing the battery is because of the physical restriction of the new battery compartment position. If there was still a way to access the battery on the side of the PCB without removing the module from the chassis, then fitting or replacing these batteries with the controller powered ON would still be possible.
To facilitate the removal of power while replacing a low battery in the SLC 5/03, 5/04 or 5/05 controllers, a 30 minute capacitor is provided to retain the program in memory...
39773 - SLC 5/01-5/05: Battery Replacement Procedure
Access Level: Everyone
For most all Allen Bradley controllers, where there is a readily accessible and replaceable battery, you are recommended to fit or replace them while the controller is powered ON. This way the controller is less likely to lose its program in memory while the battery is removed. When powered ON, we must remember that the battery is not holding the program in memory, so it is permitted to replace them while powered ON.
Interesting to read above how Rockwell tell us not to use a 1747-BA in a CompactLogix controller which "must" use a 1769-BA?
The specifications for the official, and quite expensive, 1747-BA, 1763-BA and 1769-BA batteries are identical and, in fact, they are all the very same part number: SANYO P/N CR14250SE
56602 - 1747-BA, 1763-BA and 1769-BA batteries capacity
Access Level: TechConnect
...&...
(NOTE: The below link directly downloads a WORD document, but it's safe)
16458 - All Product Battery Data and Cross-Reference
Access Level: TechConnect
Boo Rockwell...Go Mark!!
Regards,
George