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2 Nomenclature and Installation
2-2
CJ-series PROFINET IO Controller Unit Operation Manual for NJ-series CPU Unit (W511)
2-1
Unit Components
The illustration below shows the Status indicators with 7-segment display (A), the Unit number
selector switch (B) and the PROFINET IO Ethernet connector (C) on the front side of the CJ1W-
PNT21 Unit. Each of these components is explained in the following sections.
The CJ1W-PNT21 PROFINET IO Controller Unit uses the following indicators:
•
Four status indicators
•
Two 7-segment displays to show extra information
•
Two dot indicators
2-1-1
Nomenclature and Functions
CJ1W-PNT21
Indicators