Epson EM07ZS1647F User Manual page 27

Total Drop Line Length
The total drop line length is the total distance of all drop lines on one network.
Terminating
Resistor
In the figure above, the total drop line length is 17 m.
The maximum total drop line length is restricted by baud rate as shown in the table below.
The cable thickness is not related to the restriction.
Cable Current Capacity
The current-carrying capacity of the DeviceNet network cable is restricted as shown below:
Current Capacity
The following figures illustrate power supply configuration examples.
When an external power supply is installed on the network as shown in the figure below, the
current capacity is 11A and it exceeds the permissible current of the cable.
Terminating
Resistor
External Power
Supply 24 V DC
If the location of the external power supply is changed on the network as shown in the figure
below, the power supply can be used on the network because the current capacity on the left
side of the power supply tap is 5 A and that on the right side is 6 A.
Terminating
Resistor
Fieldbus I/O Rev.6
2 m
2 m
1 m
4 m
3 m
1 m
Baud Rate
500 kbps
250 kbps
125 kbps
Thick Cable
8A
Power Supply Tap
1A
1A 1A
Power Supply Tap
2A
External
Power Supply
1A
24 V DC
1A 1A
Trunk Line
Terminating
Resistor
4 m
Max. Total Drop Line Length
Trunk Line
Thin Cable
3A
Trunk Line
2A 2A
2A
2A
Trunk Line
2A 2A
2A
39 m
78 m
156 m
Drop Line (Unit: A)
4.57 / Drop Line Length (m) ≤ 3A
Terminating
Resistor
Terminating
Resistor
2. Installation
15