2. Installation
Maximum Network Length (Maximum Trunk Length)
The maximum network length is the longest distance either between terminating resistors or
between the two most distant nodes on the network.
Terminating
Resistor
Trunk Line
The longest distance is the maximum network length.
Terminating
Resistor
The maximum network length is restricted by the type of cable and the baud rate.
Maximum Network Length
Baud Rate
Thick Cable
Thin Cable
500 kbps
250 kbps
125 kbps
100 m
250 m
500 m
100 m
100 m
100 m
Both Thick Cable and Thin Cable can be combined and used for trunk lines. In this
case, the maximum network length is calculated using the following formulas.
Baud Rate
Maximum Network Length
500 kbps
Thick Cable Thin Cable Length
≤
100m
250 kbps
Thick Cable 2.5 × Thin Cable Length
≤
250m
125 kbps
Thick Cable 5.0 × Thin Cable Length
≤
500m
Drop Line Length
The drop line length is the distance from a branch on the trunk line to the end of that branch.
Trunk Line
2 m
4 m
3 m
1 m
1 m
Node 1
Node 2
Node 3
In figure above, each drop line length is as follows:
Drop Line to Node 1: 4 m
Drop Line to Node 2: 6 m
Drop Line to Node 3: 6 m
One drop line length should be 6m or less.
14
Fieldbus I/O Rev.6
Summary of Contents for EM07ZS1647F
Page 1: ...Rev 6 EM07ZS1647F EPSON RC Option Fieldbus I O ...
Page 2: ...E PSON RC Option Fieldbus I O Rev 6 ...
Page 8: ...vi Fieldbus I O Rev 6 ...
Page 12: ...Table of Contents x Fieldbus I O Rev 6 ...
Page 80: ...2 Installation 68 Fieldbus I O Rev 6 ...
Page 88: ...3 Operation 76 Fieldbus I O Rev 6 ...
Page 164: ...5 Maintenance Parts List 152 Fieldbus I O Rev 6 ...
Page 168: ...Appendix A applicomIO Upgrade 156 Fieldbus I O Rev 6 ...
