Omron C-series - Manual (Page 27)

4-1 Section PC Link Systems
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4-1 PC Link Systems
It is necessary to use Link Adapters when 3 or more PC Link Units are connected
in a System.
A PC Link System can be connected using Link Adapter AL001 as shown in the
diagram below.
CPU Rack with
PC Link Unit CPU Rack with
PC Link Unit CPU Rack with
PC Link Unit CPU Rack with
PC Link Unit
Link Adapter
AL001
Link Adapter
AL001
RS-422 branch line
(10 m max.)
RS-422 branch line
(10 m max.)
RS-422 RS-422 RS-422
Link Adapters AL002-(P)E and AL004-(P)E can be used to insert optical links
between PC Link Units to extend transmission distance and provide superior re-
sistance to noise. Optical links connect only Link Adapters; they do not directly
connect to the PC Link Units themselves. In the diagram below, the straight lines
represent wire cables and the jagged lines represent optical fiber cables.
C-Series PC with
PC Link Unit
C-Series PC with
PC Link Unit
Link Adapter
AL004-(P)E
Link Adapter
AL004-(P)E
Link Adapter
AL004-(P)E
Link Adapter
AL004-(P)E
Link Adapter
AL004-(P)E
Link Adapter
AL004-(P)E
C-Series PC with
PC Link Unit
C-Series PC with
PC Link Unit
Optical fiber (APF/PCF)
Example 1
Example 2