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3 Nomenclature and Functions
CJ2 CPU Unit Hardware User’s Manual
3-6 CJ-series Basic I/O Units
3
3-6-1 Basic I/O Units with Terminal Blocks
z Application Precautions
• Interrupt Input Units must be mounted in the locations described below.
When using a CJ2H-CPU6@-EIP CPU Unit, all Interrupt Input Units must be connected in any of the
four positions immediately to the right of the CPU Unit, i.e., slots 0 to 3 on the CPU Rack. When
using a CJ2H-CPU6@ CPU Unit or CJ2M-CPU@@ Unit, all Interrupt Input Units must be connected
in any of the five positions immediately to the right of the CPU Unit, i.e., slots 0 to 4 on the CPU
Rack. If an Interrupt Input Unit is connected in any other position on the CPU Rack or anywhere on
an Expansion Rack, and I/O setting error (fatal) will occur.
Example: CJ2H-CPU6@-EIP
• The Interrupt Input Units must be connected in the slot ranges specified above even when the I/O
tables are edited using the CX-Programmer. If the Interrupt Input Units are not connected in the cor-
rect positions, an error will occur when the I/O tables are generated from the CX-Programmer.
A401.10 will turn ON to indicate an I/O setting error and A405.08 will turn ON to indicate that an Inter-
rupt Input Unit is in the wrong position.
Note Even if a Unit is physically in one of the correct positions, a Dummy Unit can be registered in the I/O tables,
causing a Unit to be defined in a position different from its physical position.
• There are limits to the number of Interrupt Input Units that can be mounted. If these limits are
exceeded, a too many I/O points error (fatal error) will occur.
• The input response time cannot be changed for the CJ1W-INT01, and the related portions of the
Basic I/O Unit input time constants in the PLC Setup, and the setting status in A200 to A259 will not
be valid.
z Input Signal Width
Input signals must meet the following conditions.
Unit ON time OFF time
CJ1W-INT01 0.05 ms min. 0.5 ms min.
0 1 2 3 4 5 6 7 8 9
Power
Supply
Unit
CPU
Unit
Connect here.
Cannot be used.
ON OFF
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