Chapter 2.
NAMES AND FUNCTIONS OF PARTS
2 - 1 Structure
The DCP551 consists of a main unit, console, case, and terminal base.
DCP551A model DCP551B model
2-1
Console
Provides 7-segment displays, LEDs, operation keys,
and a loader interface unit.
Terminal base
Provides terminals to connect a power supply,
input, output, event output, external switch input,
and auxiliary output (optional) , etc.
Case
Main unit
Console and electric circuit board, etc.
Terminal cover
Covers power supply and
prevents electric shock.