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model 2000 DeviceNet Module Manual (DN611/DN611A)
Chapter 8 Installation and Wiring
8
Source: Guideline for the Environment of Installing Microcomputer-applied
Instrumentation and Control Devices (by the [Japan Electric Measuring Instruments
Manufacturers' Association])
In case of using a cable duct, place a steel-made separator in a cable duct and separate
the power cables from the trunk cables as shown below.
Figure 8-1 Example of Cabling through a Duct
In installing cables in a pit, use a separator as used in cabling through a duct.
Figure 8-2 Example of Cable Installation in a Pit
(5) Cabling routes
The order of desirability in choosing a route for transmission cable installation is as
follows:
• Route exclusive to the transmission cables
• Route exclusive to computer system cabling
• Route exclusive to general instrumentation cabling
• Route exclusive to plant control cabling
8.4.2
Cabling inside the cubicle
Observe the following in installing the DeviceNet drop cables.
(1) Wiring route
Use the weak signal route in the cabinet to lay the DeviceNet drop cables.
Keep them at least 50 cm away from the power cables, in particular.
(2) Clamping the cables
Use clamps so that the weight of the cables will not bear on the connectors. Don't
bend the cables in circles smaller the minimum bending radius.
(3) Ask the cable manufacturer for the allowable cable bending radius and other physical
characteristics.
(4) Avoid installing cables at a place where it is hot, moist, dusty, or has oil vapor.
Transmission cables
Power cables
(Instrumentation power
cable, solenoid valve,
operating signal line, etc.)
Metal duct
Separator
Signal cables
Power cables
Separator (steel-made)
Grounding (Class D)