B-108

CJ1 SYSTEM POWER AND EXP ANSION

Power and Expansion Selection

This section provides tools to calculate the CJ1 system current consumption total needed to select

the power supply. When the number of modules or power requirements exceeds the capability of the

power supplies available, I/O expansion racks solve the problem. If the number of modules per rack

exceeds 10 or the current consumption is greater than the capacity of the power supply units, use the

CPU and expansion rack configuration.

A CJ1 system consists of a power supply, a CPU, and up to 10 basic I/O, special I/O and

CPU bus units, and an end cover. See page B-109.

What is the basic configuration?

The expansion I/O rack contains a power supply, an I/O interface module and the remaining

I/O modules. Each expansion rack requires a power supply, the I/O interface module and up

to 10 more modules.

Note: Order one CJ1W-IC101 I/O control module for the CPU rack and one CJ1W-II101 I/O

interface module for each I/O expansion rack. Connect the modules with a cable of

the appropriate length. Second and third I/O expansion racks connect between I/O

interface modules. See page B-117 for details.

What goes on expansion I/O racks?

All the current consumption ratings for the CPU, basic I/O, special I/O and CPU bus units

are collected in the tables on pages B-110 to B-111.

Where are ratings to calculate overall current consumption?

Compare the current consumption total of basic I/O, special I/O, and CPU bus units to

determine which power supply to use.

Note: If more than 10 modules are required or the current consumption exceeds the output

capacity of the power supplies, go to page B-109 for configuration of I/O expansion racks.

The same power supply units can be used for both CPU and I/O expansion racks.

Depending on the CPU chosen, the system can be expanded with up to three additional racks of

basic I/O, special I/O and CPU bus units.

Which power supply is right?

How many expansion I/O racks can be used?

Output rating

Output capacity

Power supply model

See page

5 A, 5 VDC

25 W max.

CJ1W-PD025

B-110

5 A, 5 VDC with 2 A RUN output

25 W max.

CJ1W-PA205R

B-110

2.8 A, 5 VDC

14 W max.

CJ1W-PA202

B-110

Maximum I/O modules

per CPU

Maximum I/O expansion

racks per CPU

CPU models

40

3

CJ1G-CPU44H

CJ1G-CPU45H

CJ1H-CPU65H

CJ1H-CPU66H

20

1

CJ1M-CPU13

CJ1M-CPU23

30

2

CJ1G-CPU42H

CJ1G-CPU43H

10

0

CJ1M-CPU12

CJ1M-CPU22

10

0

CJ1M-CPU11

CJ1M-CPU21

Input Voltage

100 to 240 VAC

24 VDC