Transfer modules. Pre-assembled cable, PAC, LiYY cable, 0.25 mm². The pre-assembled PAC cables establish the electrical and logical connection between the PLC and the PLC interfaces. These cables consist of the following elements: Manufacturer's PLC connection. Multi-pole LIYY or LY YCY (shielded) cable with a cross-section of 0.14 mm² or 0.25 mm². SubD or RSV connectors for connection to the interface. The cables are automatically tested for continuity and insulation to ensure their specific functionality for which they were designed.