UFC 3-535-01
17 November 2005
Figure 12-4. Computerized Control System using PLC Block Diagram
ONLY CONTROL CIRCUITS SHOWN
CONTROL TOWER
PRIMARY
ENGINE-GENERATOR
CONTROL
ROOM OR SHELTER
PANEL
AUTOMATIC
STANDBY
PROGRAMMABLE
POWER
POWER
LOGIC
TRANSFER
SYSTEM
CONTROLLER
6-PAIR #19AWG OR
FIBER OPTIC CABLE
LIGHTING VAULT
VISUAL
AIDS
SERIES
SECONDARY
REG
CONTROL
PANEL
SERIES LIGHTING
CIRCUIT
SERIES
REG
PROGRAMMABLE
PROGRAMMABLE
LOGIC
LOGIC
CONTROLLER
CONTROLLER
VISUAL
SERIES
AIDS
SELECTOR
SWITCH
MANUAL
CONTROL
MISC. LIGHTING
TRANSFER
CIRCUITS
UNIT
SERIES
REG
167
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