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Using the Unit Version Labels
Unit version labels are provided with the product. These labels can be attached to the front of previous
Controller Link Units to differentiate between Controller Link Units of different unit versions.
Unit Version Notation
The unit versions are indicated in this manual as follows:
Function Support by Unit Version
Note Use the CX-Net in CX-Programmer version 5.0 or later to set a data link area
in which the number of send and receive words exceeds 12,000 words, or to
set data link tables that allocate the same area for Area 1 and Area 2.
Unit Versions and Manufacturing Dates/Lot Numbers
Notation in product nameplate Notation in this manual Remarks
Ver.1.2 or later after the lot number CS/CJ-series Controller Link Units
with unit version 1.2 or later
Information for which no particular
version is specified applies to all
unit versions.
Blank after the lot number Pre-Ver. 1.2 CS/CJ-series Control-
ler Link Units
Functions Earlier version (Pre-Ver. 1.2) Unit version 1.2
CS1W-CLK21-V1
CJ1W-CLK21-V1
CS1W-CLK21-V1
CJ1W-CLK21-V1
Maximum number of data link
words (data link area for sending/
receiving that is created for a sin-
gle node in a single CPU Unit)
12,000 max. 20,000 max.
Data Link Area The same area cannot be allo-
cated for both Area 1 and Area 2.
The same area can be allocated
for both Area 1 and Area 2.
Maximum number of Units con-
nected to a single CPU Unit
4 Units 8 Units
Model Until August 2004 From September 2004
CS1W-CLK21-V1 Pre-Ver. 1.2 Unit version 1.2
(Lot No. 040901 and later)
CJ1W-CLK21-V1