Allen-Bradley 1756-CPR2 ControlLogix Redundant Power Supply Cable The 1756-CPR2 Redundant Power Supply Cable by Allen-Bradley is a specialized cable which comes with the ControLogix Redundant Power Supply Chasis module. It is a 0.91m (3ft) cable used for connecting the Chassis Adapter module to the redundant power supply module. The 1756-CPR2 has an operational temperature range between 0 and 60 °C (32 and 140 °F) and it weighs approximately 0.679 kg.