Page 315 - CITS - Electronic Mechanic - TT - 2024
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ELECTRONICS MECHANIC - CITS
The PLC panel consists of the main breaker switch, bus bar, circuit breakers, relays, contactors, PLC, fuses,
SMPS, terminal boards, utility sockets, and earthing points. A typical cabling scheme that collects and distributes
signals to and from the field devices.
A Field Junction Box Is used to concentrate the signals into multi-conductor homerun cables or main cables.
Wiring of PLC include below system:-
The homerun cables then terminate in a remote or marshalling cabinet where the signals are marshalled (reorga-
nized) as necessary to efficiently terminate at the I/O interface of the DCS or PLC system
300
CITS : E & H - Electronics Mechanic - Lesson 180 - 187
