ALLEN BRADLEY 1756-LSP/B GuardLogix Safety Partner Module

OverviewALLEN BRADLEY 1756-LSP/B is the GuardLogix safety partner module for Rockwell ControlLogix platform, hardware revision B. ALLEN BRADLEY 1756-LSP/B cannot run independently as a main controller. It must be paired with 1756-L61S, 1756-L62S, 1756-L63S primary GuardLogix CPU in the same chassis to form dual safety execution architecture. It mirrors and cross-checks the safety task executed by the main controller, which supports SIL3 / PLe safety certification. It shares safety memory resources with the matched primary controller, and uses 1756-BA2 battery for data retention. This module has no built-in network ports, all communication relies on the paired GuardLogix processor. This unit was discontinued in June 2017, and its functional replacement is 1756-L7SP. In safety retrofit projects for press, automotive robot, burner management and oil & gas interlock systems, ALLEN BRADLEY 1756-LSP/B is a critical spare for legacy GuardLogix 5560 safety systems.

FeaturesALLEN BRADLEY 1756-LSP/B is installed in the ControlLogix backplane slot and synchronizes safety runtime data with the primary GuardLogix controller via chassis bus. The GuardLogix Safety Partner Module only executes safety logic and does not handle standard sequential control tasks. It continuously compares safety calculation results with the main processor; any mismatch will trigger the safety system into safe state. It supports comprehensive safety diagnostics, fault logging and safety I/O status verification. It is programmed together with the primary controller using RSLogix 5000 software. The module meets industrial shock, vibration and EMC standards, and works with Guard I/O, safety drives and safety network devices. ALLEN BRADLEY 1756-LSP/B must be matched with the corresponding GuardLogix 5560 safety CPU, and it is not compatible with standard ControlLogix processors.

SpecsALLEN BRADLEY 1756-LSP/B safety partner module. The GuardLogix Safety Partner Module catalog: 1756-LSP, revision B. Compatible primary CPU: 1756-L61S, 1756-L62S, 1756-L63S. Safety certification: SIL3, PLe, Cat.4. Power supply: 5.1V DC from chassis backplane. Backup battery: 1756-BA2. Network port: none. Mounting: ControlLogix chassis slot. Lifecycle: discontinued. Functional replacement: 1756-L7SP. It is stocked as safety partner spare.

Operating ParametersALLEN BRADLEY 1756-LSP/B ambient operating temperature: 0℃ ~ +60℃. The GuardLogix Safety Partner Module relative humidity: 5%~95% non-condensing. Protection class: IP20. EMC: comply with IEC industrial standards.

PrincipleALLEN BRADLEY 1756-LSP/B receives the same safety program and safety I/O data from the primary GuardLogix controller through the backplane. The GuardLogix Safety Partner Module runs safety logic in parallel and cross-validates output results with the main processor. If hardware failure, program mismatch, or safety channel fault is detected, ALLEN BRADLEY 1756-LSP/B will force the safety system to safe state and report fault codes to the controller. The safety partner architecture eliminates single point failure for safety tasks and maintains the required safety integrity level.

ApplicationsALLEN BRADLEY 1756-LSP/B is widely deployed in automotive production cells, stamping presses, packaging lines, burner management systems, oil and gas safety interlock and power auxiliary safety systems. The GuardLogix Safety Partner Module works together with the primary GuardLogix CPU to implement dual-channel safety logic verification, cooperating with Guard I/O and safety actuators. ALLEN BRADLEY 1756-LSP/B is a preferred spare for legacy GuardLogix 5560 safety system maintenance and replacement.