Quantum ＋ ePAC Level 20 redundant processor convenient ordering package, including: 2 * BMEH4040 controller; 2 * RJ45 electrical port SFP synchronous cable adapter 490NAC0100; 2 * 4-slot Ethernet, X-Bus dual bus backplane BMEXBP0400; 2 * 17W 24V DC power supply module BMXCPS2010; 1 * Ethernet straight-through cable 490NTW00002U; 2 * Ethernet communication module BMENOC0301