The 1756-LSP is part of the 5570 GuardLogix Programmable Automation Controller (PAC). This module is a safety partner module which acts as a co-processor for safety functions. It is a chassis-based module with integrated memory that corresponds to the memory of the installed primary control. This memory may be a 1MB-3.75MB safety memory. It is installed beside the primary controller and draws current from the backplane amounting to 1200 milliamperes @ 5.1 Volts DC and 14 milliamperes @ 24 Volts DC.