Installation Styles; Concentrated Installation; Figure 3-2 An Example Of Concentrated Installation - Hitachi HSC-2100 Hardware Manual

3 INSTALLATION AND MODULE MOUNTING

3.3 Installation Styles

3.3.1 Concentrated installation

Concentrated installation is a style of installing the programmable controller. As shown in
Figure 3-2, this installation style installs all of the CPU or LPU unit and I/O unit of a
programmable controller in one single cubicle. This installation style, commonly applied to
small-scale systems, enables the construction of a system relatively resistant to electric noise.
This is because the style confines all the interconnecting cables in the single cubicle.
2
2 mm or
more in size
Shield grounding
Cubicle ground
To control power source
2
5.5 mm or more in size
Grounding other than the
grounding for
programmable controller
NFB
NFB
Electrostatic-shielded
insulating transformer
Insulate the cubicle from the floor.
Grounding metal piece to ground the
programmable controller unit (this
metal piece must be insulated from the
cubicle's bottom)
The opening for cabling must be
closed up with putty.

Figure 3-2 An Example of Concentrated Installation

LPU or CPU unit
H
N
LG
I/O unit
H
N
LG
Terminal block (TB)
3-4
Mount base's frame
ground (FG) terminal
2
5.5 mm
Class D grounding for
programmable controller
2
2 mm or
more in size
Remote I/O
cable
or more in size