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Basic Configuration
Typical applicable Sensors for Digital Inputs:
Typical applicable Pulse Generators for
Counter Inputs:
Mounting Restrictions
The CJ1W-CT021 High-speed Counter Unit is a Special I/O Unit that belongs to the CJ Series.
The CJ1W-CT021 High-speed Counter Unit can be mounted in an NJ-series CPU rack or NJ-series
Expansion Rack.
Note If you want the CJ1W-CT021 High-speed Counter Unit to generate interrupts to activate
external interrupt tasks in a CJ1-H CPU Unit, the Counter Unit must be in one of the five posi-
tions immediately to the right of the CJ1-H CPU Unit on the CPU Rack. If you want the High-
speed Counter Unit to generate interrupts to activate external interrupt tasks in a CJ1M CPU
Unit, the Counter Unit must be in one of the three positions immediately to the right of the
CJ1M CPU Unit on the CPU Rack.
No external interrupt tasks can be activated in CJ1-H or CJ1M CPU Units if the CJ1W-CT021
CJ-series High-speed Counter Units Operation Manual for NJ-series CPU Unit(W492)
Photo Electric
Sensor
Push Button
Limit Switch
Proximity Switch
Other Sensors
Incremental
Encoder
Proximity Sensor
Other P ulse
Generators
Typical applicable Actuators for Digital Outputs:
Relais
Lamp
Motor Interface
ON/OFF
High/Low Speed
Forward/Reverse
Brake ON/OFF
Other Actuators
1 Introduction
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