1756-LSP | Allen-Bradley Safety Partner Modules
The Allen-Bradley 1756-LSP is a GuardLogix 5560 safety partner module designed for SIL 3 and Performance Level e (PL e) applications within the ControlLogix platform. Functioning as an isolated redundant co-processor alongside a primary GuardLogix controller, it provides a dual-channel architecture required to execute safety-critical logic. The module occupies a single chassis slot, connects directly via the backplane, and relies on the primary controller for configuration and key-switch operation.
Redundant Processing and Safety Memory Structure
The 1756-LSP operates as the secondary processing channel, mirroring safety tasks executed by compatible primary controllers, including the 1756-L61S, 1756-L62S, and 1756-L63S. It contains no standard user memory or independent task execution capability; its safety memory capacity dynamically scales based on the paired primary controller, providing 1 MB when paired with a 1756-L61S or 1756-L62S, and 3.75 MB when paired with a 1756-L63S.
Chassis Installation and Power Requirements
To meet SIL 3 requirements, the module must be installed in the slot immediately adjacent to the right of the primary controller, forming a two-slot controller pair. The module draws 1200 mA at 5.1 VDC and 14 mA at 24 VDC from the 1756 chassis backplane, dissipating 3.5 W of power. It incorporates 30 V continuous basic insulation with type-testing to 720 VDC for 60 seconds from the RS-232 port to the system backplane.
Parameter | Specification
| Parameter | Specification |
|---|---|
| Model | 1756-LSP |
| Brand | Allen-Bradley |
| Product Type | Safety Partner Modules |
| Product Line | GuardLogix 5560 |
| Compatible Primary Controllers | 1756-L61S, 1756-L62S, 1756-L63S |
| Safety Integrity Level | Up to SIL 3 / PL e |
| Backplane Current Draw | 1200 mA @ 5.1 VDC, 14 mA @ 24 VDC |
| Power Dissipation | 3.5 W |
| Thermal Dissipation | 11.9 BTU/hr |
| Isolation Voltage | 30 V continuous (720 VDC for 60 s type-tested) |
| Slot Requirement | 1 slot (2 slots total for primary and partner pair) |
| Replacement Battery | 1756-BA2 (0.50 g lithium) |
| Compatible Chassis | 1756-A4, 1756-A7, 1756-A10, 1756-A13, 1756-A17 |
| Operating Temperature | 0 to 60 deg C |
| Storage Temperature | -40 to 85 deg C |
| Relative Humidity | 5 to 95% (non-condensing) |
| Weight | 1.50 lbs (0.68 kg) |
Frequently Asked Questions
Q: Can the 1756-LSP run standalone standard automation programs without a primary controller? A: No, the 1756-LSP is strictly a safety partner module that contains no standard user memory and must be paired with a primary GuardLogix controller (1756-L61S, 1756-L62S, or 1756-L63S) to function.
Q: Where must the 1756-LSP module be installed inside the ControlLogix chassis? A: It must be installed in the slot immediately to the right of the primary GuardLogix controller to satisfy hardware pairing and SIL 3 functional safety requirements.
Q: How is the safety memory capacity determined for the 1756-LSP? A: Memory allocation depends entirely on the paired primary unit: it provides 1 MB of safety memory when paired with a 1756-L61S or 1756-L62S, and 3.75 MB when paired with a 1756-L63S.
1756-LSP | Allen-Bradley Safety Partner Modules
1756-LSP | Allen-Bradley Safety Partner Modules
The Allen-Bradley 1756-LSP is a GuardLogix 5560 safety partner module designed for SIL 3 and Performance Level e (PL e) applications within the ControlLogix platform. Functioning as an isolated redundant co-processor alongside a primary GuardLogix controller, it provides a dual-channel architecture required to execute safety-critical logic. The module occupies a single chassis slot, connects directly via the backplane, and relies on the primary controller for configuration and key-switch operation.
Redundant Processing and Safety Memory Structure
The 1756-LSP operates as the secondary processing channel, mirroring safety tasks executed by compatible primary controllers, including the 1756-L61S, 1756-L62S, and 1756-L63S. It contains no standard user memory or independent task execution capability; its safety memory capacity dynamically scales based on the paired primary controller, providing 1 MB when paired with a 1756-L61S or 1756-L62S, and 3.75 MB when paired with a 1756-L63S.
Chassis Installation and Power Requirements
To meet SIL 3 requirements, the module must be installed in the slot immediately adjacent to the right of the primary controller, forming a two-slot controller pair. The module draws 1200 mA at 5.1 VDC and 14 mA at 24 VDC from the 1756 chassis backplane, dissipating 3.5 W of power. It incorporates 30 V continuous basic insulation with type-testing to 720 VDC for 60 seconds from the RS-232 port to the system backplane.
Parameter | Specification
| Parameter | Specification |
|---|---|
| Model | 1756-LSP |
| Brand | Allen-Bradley |
| Product Type | Safety Partner Modules |
| Product Line | GuardLogix 5560 |
| Compatible Primary Controllers | 1756-L61S, 1756-L62S, 1756-L63S |
| Safety Integrity Level | Up to SIL 3 / PL e |
| Backplane Current Draw | 1200 mA @ 5.1 VDC, 14 mA @ 24 VDC |
| Power Dissipation | 3.5 W |
| Thermal Dissipation | 11.9 BTU/hr |
| Isolation Voltage | 30 V continuous (720 VDC for 60 s type-tested) |
| Slot Requirement | 1 slot (2 slots total for primary and partner pair) |
| Replacement Battery | 1756-BA2 (0.50 g lithium) |
| Compatible Chassis | 1756-A4, 1756-A7, 1756-A10, 1756-A13, 1756-A17 |
| Operating Temperature | 0 to 60 deg C |
| Storage Temperature | -40 to 85 deg C |
| Relative Humidity | 5 to 95% (non-condensing) |
| Weight | 1.50 lbs (0.68 kg) |
Frequently Asked Questions
Q: Can the 1756-LSP run standalone standard automation programs without a primary controller? A: No, the 1756-LSP is strictly a safety partner module that contains no standard user memory and must be paired with a primary GuardLogix controller (1756-L61S, 1756-L62S, or 1756-L63S) to function.
Q: Where must the 1756-LSP module be installed inside the ControlLogix chassis? A: It must be installed in the slot immediately to the right of the primary GuardLogix controller to satisfy hardware pairing and SIL 3 functional safety requirements.
Q: How is the safety memory capacity determined for the 1756-LSP? A: Memory allocation depends entirely on the paired primary unit: it provides 1 MB of safety memory when paired with a 1756-L61S or 1756-L62S, and 3.75 MB when paired with a 1756-L63S.
