Panasonic S-LINK V, User Manual

Page: 18 / 182

18
Chapter 1
Outline of Design
Connection of End Unit
Each system needs at least 1 SL-VEU end unit. If the SL-VEU unit is not connected, the system may
not operate properly.
If the cable lengths are the same, connect the end unit to the line having fewer nodes (units).
CAUTION
Be sure to connect 1
SL-VEU
end unit to the end of the main line.
If the branch line length exceeds 80% of the maximum transmission distance, connect 1
SL-VEU
unit to the end
of the branch line, too.
Up to 2
SL-VEU
end units can be connected for 1 system.
<If the branch line length is equal to the main line length>
Same length (Note 1)
SL-VEU
Connect the end unit to the line
having fewer nodes.
<If the branch line length is 80% of the main line length or more>
SL-VEU
80% of the main line length or more
Maximum transmission distance
Main line
Connect the end unit to the main line
and branch line, respectively.
Notes: 1) The maximum transmission distance depends on the cable conductor cross section and the number of nodes.
For the maximum transmission distance, refer to page 17.
2) Even if the cable lengths are the same, if both the main and branch line lengths exceed 80% of the maximum transmission dis-
tance, connect two SL-VEU end units.
Selection of Control Cable and Connector Link Cable
Control cable selection method:
(For use of SL-VCU1 only)
Check the distance from the SL-VCU1 to the PLC I/O connector, and then select the applicable control cable:
SL-VC1000 (1m long) or SL-VC2000 (2m long).
One control cable is needed for every 8 PLC I/O connectors.
Connector link cable selection method:
(For use of SL-VCU1 only)
The PLC I/O connector installation direction (vertical) and layout depend on the PLC manufacturers.
Check the connection distance of the PLC I/O connector, and then select the applicable connector link cable:
SL-VF70
(70mm),
SL-VF150
(150mm), or
SL-VF250
(250mm).
For a detailed description, refer to page 172.