- Discontinued GuardLogix controller with 2 MB standard and 1 MB safety memory
- One local RS-232 port and no embedded communication port
- 1756-L71S is the manufacturer-listed functional replacement
1756-L61S is a GuardLogix safety controller for legacy ControlLogix safety systems.
Its replacement is a controlled safety-system activity because the controller, safety project, communication architecture and validation record are interdependent.
Verify the approved migration plan before using the functional replacement.
Availability, condition, price, and shipping time for 1756-L61S are confirmed during quotation.
Allen-Bradley 1756-L61S GuardLogix Controller Manuals, Product Family, Links
Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.
- Use the listed 1756-L71S functional replacement only with an approved migration plan
- Preserve the validated safety application and safety partner arrangement
- Revalidate the complete safety function after controlled migration
- Account for the absence of an embedded communication port
- Identify the installed RS-232 and external network architecture
- Do not assume a replacement retains the original network path
- Record firmware and safety-project revision before controller removal
- Identify any 1784-CF64 or 1784-CF128 card and its handling procedure
- Maintain independent verified application backups
- SIL 3 and Performance Level e machine-safety control using a matched 1756-LSP safety partner
- GuardLogix emergency-stop and protective-device safety functions
- Distributed CIP Safety systems using compatible remote safety I/O over supported networks