Chapter 1 0BIntroduction System planning 2 Master Slave 1 Control panel Control panel Over 100 meters Concentration point Concentration point 1-7 Sixty-three racks at most Slave 1 (The remote I/O system is Rack 1 (eight-slot main backplane) in use.) Digital Digital Digital Digital Digital Digital Power Remote input input input output output output supply slave module module module module module module Slave 1 Rack 2 (eight-slot extension backplane) Analog Analog Analog Analog Analog Analog module Serial Power communication input input input output output output supply module module module module module module Eight racks at most Power supply Remote slave Digital input module Digital input module Digital input module Digital output module Digital output module Digital output module Power supply Analog input module Analog input module Analog input module Analog output module Analog output module Analog output module Serial communication module