1756-LSP Product datasheet   

1756-LSP Functional Description   

The Allen-Bradley 1756-LSP is a GuardLogix safety partner controller designed for use with primary controllers such as the 1756-L61S, 1756-L62S, and 1756-L63S. This module is intended to enhance safety functions, supporting SIL 3 (Safety Integrity Level) and Performance Level (e) applications. As a redundant co-processor, the 1756-LSP provides an isolated safety control channel to ensure system reliability. It is installed beside the primary controller in a ControlLogix chassis and occupies one slot. Together, the primary and safety partner controllers use two slots in total.

The 1756-LSP GuardLogix Processor Module does not have its own user memory for standard tasks. Its safety memory is dependent on the primary controller’s memory: 1MB for the 1756-L61S and 1756-L62S, and 3.75MB for the 1756-L63S. It draws 1200mA at 5.1V DC and 14mA at 24V DC, with a power dissipation of 3.5W and thermal dissipation of 11.9 BTU/hr. It operates within a temperature range of 0°C to 60°C and can withstand non-operating temperatures from -40°C to 85°C. The module has a shock rating of 30g while operating, and 50g in non-operating conditions.

The 1756-LSP Contrologix Module also features an RS-232 communication port, though it relies on the primary controller for key switching and communication functions. It includes a CompactFlash card for non-volatile memory storage and offers LED status indicators for real-time monitoring. To meet SIL 3 standards, the 1756-LSP is a GuardLogix safety partner controller  must be installed next to the primary controller in the chassis. The module is compatible with various ControlLogix chassis and power supplies, making it a versatile choice for safety-critical applications.