Rockwell Automation Allen-Bradley SynchLink 1756-DM Series Design Manual page 72

7-4
Publication 1756-TD008A-EN-P - August 2002
· The total length of the fiber optic cable should not exceed 300m.
· In a star configuration, 300m is the maximum for any of the
following cable segments:
– between time master and base block
– between time slave and splitter block
– between base block of one hub and splitter block of another
hub
· In a daisy chain or ring configuration, 300m is the total length of
cable between two adjacent nodes. If bypass switches are used,
the maximum length is the sum of lengths of three cables, as
shown in Figure 7.1.
Figure 7.1
B
Bypass 1
A
Node 1
A + B + C < 300m
For more information on hubs and bypass switch blocks, refer to the
publications listed in Table 7.2. These documents are available at The
Automation Bookstore (www.theautomationbookstore.com).
Table 7.2
Publications Related to the Hubs and Bypass Switch Blocks
Publication Title:
SynchLink Base Block Installation Instructions
SynchLink 4-port Splitter Block Installation
Instructions
SynchLink Bypass Switch Block Installation
Instructions
Bypass 2
C
Node 2
Catalog
Number:
1751-SLBA
1751-SL4SP
1751-SLBP
Publication
Number:
1751-IN001
1751-IN002
1751-IN003