The 1756-LSP GuardLogix Safety Partner Module from Rockwell Automation is a dedicated redundant safety co-processor used in early GuardLogix 5560 safety architectures.
It is designed to work only as a paired safety partner with primary GuardLogix controllers, providing deterministic safety validation and redundancy for SIL 3 / PLe functional safety systems. The LSP does not execute standalone logic; instead, it mirrors and verifies safety execution to eliminate single-point failure risks in critical automation systems.
This module is commonly found in legacy GuardLogix safety systems used in manufacturing, energy, and process industries, and has largely been replaced by newer L7SP and L8SP safety partner modules.
Technical Specifications (Including Size & Weight)
| Parameter | Specification |
|---|---|
| Model | 1756-LSP |
| Series | GuardLogix 5560 Safety Partner |
| Module Type | Safety Partner (No standalone control) |
| Supported CPUs | 1756-L61S / L62S / L63S |
| Safety Architecture | SIL 3 / PLe system redundancy |
| Memory | Mirrors primary controller safety memory |
| Communication | Backplane synchronization only |
| Slot Requirement | 2-slot configuration (with CPU pair) |
| Backplane Current (5.1V DC) | ~1.20 A |
| Backplane Current (24V DC) | ~14 mA |
| Power Dissipation | ~3.5 W |
| Isolation Voltage | ~30 V continuous |
| Operating Temperature | 0°C to 60°C |
| Storage Temperature | -40°C to 85°C |
| Humidity | 5%–95% non-condensing |
| Weight | ~0.25–0.50 kg |
Physical Dimensions
- Size (H × W × D): 145.2 × 34.55 × 136.6 mm
This compact single-slot module is installed directly adjacent to the primary GuardLogix CPU in a ControlLogix chassis, forming a tightly synchronized dual-processor safety system.
Recommended Related Models
The 1756-LSP is typically associated with legacy or migration systems such as:
- 1756-L61S / 1756-L62S / 1756-L63S GuardLogix CPUs
- 1756-L7SP (functional replacement for newer systems)
- 1756-L8SP GuardLogix 5580 safety partner module
- 1756-IB16S / 1756-OB16S safety I/O modules
- 1756-EN2T EtherNet/IP communication modules
Popular Allen-Bradley GuardLogix Models
Within the broader ecosystem, commonly used safety platforms include:
- 1756-LSP GuardLogix safety partner (legacy)
- 1756-L7SP GuardLogix 5570 safety partner (replacement)
- 1756-L8SP GuardLogix 5580 safety partner
- 1756-L73S / L72S / L71S GuardLogix safety CPUs
- 1756-L81ES / L82ES / L83ES GuardLogix 5580 safety CPUs
These modules represent the evolution of Rockwell’s functional safety architecture across multiple generations.
