Design And Operating Procedure Examples; Design - Omron CJ Series Operation Manual

1-6 Design and Operating Procedure
Examples
1-6-1

Design

I/O Capacity
Establish the I/O correspondences for each Slave Unit. Determine how many Word and Bit Slave
Units are to be connected, and calculate the current consumption for the communications power
supply.
• Units Used
I/O capacity
16 inputs
16 inputs and
8 outputs
16 outputs
2 inputs × 2
2 outputs
Note 1 Refer to the CRT1-series CompoNet Slave Units and Repeater Unit Operation Manual (Cat. No. W456) for
the current consumption of the Slave Units.
2 When Bit Slave Units are used, the current consumption of the Bit Slave Units and the external I/O, such
as sensors and actuators, is supplied from the communications power supply that is connected to the
Master Unit through the Flat Cable. Therefore, the current consumption of the following external I/O must
be added to the total power consumption.
Sensor current consumption × 2, actuator current consumption × 2
3 Here, to allow for the voltage drop, the current consumption for 14 VDC is used in the calculation for the
maximum current consumption.
Word Slave Units × 3 nodes, Bit Slave Units × 3 nodes
At the same time, provide a 24-VDC power supply with an output current of at least 0.9 A for the
communications power supply.
CJ-series CompoNet Master Unit Operation Manual for NJ-series CPU Unit (Cat. No. W493)
Model (specifica-
Slave Unit type
Word Slave Units CRT1-ID16 (16 DC
inputs, NPN)
CRT1-ID16 (16 DC
inputs, NPN) + XWT-
OD08 (8 transistor out-
puts, NPN)
CRT1-OD16 (16 tran-
sistor outputs, NPN)
Bit Slave Units CRT1B-ID02S (2 DC
inputs, sensor connec-
tor type, NPN)
CRT1B-OD02S (2 tran-
sistor outputs, sensor
connector type, NPN)
Number
tions) of Units
1
1 of each
1
2
1
Total
1 Introduction
Current consumption (See
notes 1 and 3.)
85 mA
85 mA + 5 mA = 90 mA
85 mA
80 mA + I/O current consump-
tion 76 mA (Sensor example:
35 mA × 2 + input current 3
mA × 2) (See note 2.)
Note The total for two Units is
160 mA + 152 mA.
75 mA + I/O current consump-
tion 160 mA (actuator)
Example: 80 mA × 2 (See
note 2.)
495 mA + 312 mA for I/O =
807 mA
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