Example Grounding Work - Toshiba V Series User Manual

Chapter 3 Installation & Wiring
3.4.4

Example Grounding Work

3
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Figure 3-15 shows example grounding work.
L3 controller
console
To the field
equipment
(4)
(5)
Insulator
Concrete floor
Class-D grounding
exclusive for
L3 controllers
(Serial grounding)
(Note 2)
(Note 1): If electromagnetic induction is anticipated, isolate the transmission line, and
install metal sheath to protect the line. If damage to cable (physical influence)
is anticipated, also install metal sheath for protection. For other cases, install
rigid PVC sheath.
(Note 2): L3 controller consoles (1) and (2), and (4) and (5) are grounded in series, and
L3 controller console (3) is grounded independently.
Figure 3-15 Example Grounding of L3 Controller Consoles
Serial-grounding cable must be laid along the transmission line, as
isolated from power supply line and cable that can electromagnetic
induction. Where these cables are in parallel, each cable must be
spaced from others.
Distribution board for power
control equipment
L3 controller
console
Cables in each
console must be
isolated from
each other.
Power
Ethernet control LAN
supply line
transmission line
Sheathing
(Note 1)
Grounding for power
control equipment
model 3000 Loop Controller L3 User's Manual - Basic Hardware -
Ethernet
L3 controller
control LAN
console
transmission
line
Insulator
(2)
(1)
Channel base
Steel
Insulator
floorboard
Ethernet control LAN Grounding
transmission line conductor
L3 controller
console
(3)
Concrete floor
Insulator
Class-D grounding Class-D grounding
exclusive for exclusive for
L3 controllers L3 controllers
(Independent grounding) (Serial grounding)
(Note 2) (Note 2)