Overview
The Allen-Bradley 1756-LSP is a GuardLogix safety partner processor module designed for use within ControlLogix chassis-based systems. This safety partner controller provides redundancy as a second isolated channel for the system’s safety-related functions. The GuardLogix system is a full-function Logix processor that also provides safety control, using a primary controller and a safety partner to achieve SIL 3, PLe.
Key Features
- Safety Partner module for implementing safety functions compliant up to and including SIL 3 and Performance Level (e) applications
- Single project with safety and standard control together; 1oo2 safety architecture providing unmatched safety and ease of use
- Functions as a co-processor enabling a dedicated and isolated processor for safety functions, part of the 5560 GuardLogix product family
- Built-in serial port for communication with other devices; handles up to 250 controller connections
- Compatible with CompactFlash non-volatile memory card
- Status indicator LEDs for power and fault indication
Technical Specifications
- Current Draw: 1200 mA at 5.1V DC, 14 mA at 24V DC
- Power Dissipation: 3.5 W; Thermal Dissipation: 11.9 BTU/hr
- Isolation Voltage: 30V continuous (basic insulation, type-tested RS-232 port-to-system at 720V DC for 60 seconds)
- Operating Temperature: 0–60°C; Non-Operating Temperature: −40–85°C; Maximum Surrounding Air Temperature: 60°C; Non-Condensing Relative Humidity: 5–95%
- Operating Shock: 30 g; Non-Operating Shock: 50 g; Operating Vibration: 2 g at 10–500 Hz
- Mounting: Installed in immediate slot beside primary controller; occupies single slot but module pair occupies 2 chassis slots
- Safety Memory: 1 MB (with 1756-L61S/L62S) or 3.75 MB (with 1756-L63S)
- Certifications: UL, c-UL-us, CE, CSA, C-Tick, FM, ATEX, TÃœV-certified for Functional Safety
Typical Applications
The 1756-LSP is suited for industrial automation systems requiring functional safety architecture. Best suited for PLe and SIL 3 safety applications, meant to be used as the safety partner device within a complete GuardLogix system operating alongside a primary GuardLogix controller module. Common applications include emergency stop systems, safety interlocks, and hazard mitigation in machinery protection and process safety.
Compatibility & Replacements
Compatible for use with 1756-L61S, 1756-L62S, and 1756-L63S primary controllers. One 1756-LSP is required for each GuardLogix controller. The 1756-LSP was discontinued as of June 1, 2017; the functional replacement product is 1756-L7SP. For legacy ControlLogix safety deployments still in service, this Series B module remains available through authorized surplus channels and remains compatible with existing GuardLogix architectures.
