Omron CJ1W-EIP21 用户手册

If tag data links are being used, use 100Base-TX. Otherwise, 10Base-T can
be used, but this is not recommended.

Model number

CJ1W-EIP21

Type

100Base-TX (See note.)

Applicable PLCs

CJ-series PLCs

Unit classification

CJ-series CPU Bus Unit

Mounting location

CPU Rack or Expansion Rack

Number of Units that can be 
mounted

8 max. (including Expansion Racks)

Note Up to seven EtherNet/IP Units can be connected to a CJ2H-CPU

@@

-EIP CPU 

Unit. Up to two EtherNet/IP Units can be connected to a CJ2M CPU Unit.

CPU Unit 
words used

Allocated CIO Area 
words (CPU Bus 
Unit words)

25 words/Unit (one unit number’s words)

These words contain control bits and flags, the target node PLC’s operating and error 
information, Unit status, communications status, registered/normal target node infor-
mation, and FINS/TCP connection status.

Allocated DM Area 
words (CPU Bus 
Unit words)

100 words/Unit (one unit number’s words)

These words contain the IP address display/setting area.

User-set area

Any usable data area words

Target node PLC’s operating and error information, and registered/normal target 
node information

CPU Bus Unit Sys-
tem Setup

Not used.

Non-volatile memory within Ether-
Net/IP Unit (See note.)

The following settings are stored in the EtherNet/IP Unit’s non-volatile memory.

Note Unlike the regular Ethernet Units, the CPU Bus Unit Setup Area in the CPU 

Unit is not used for these settings.

1. Unit Setup (communications settings for the EtherNet/IP Unit, such as the IP ad-

dress, DNS server settings, host name, baud rate, FINS/UDP settings, and FINS/
TCP settings)

2. Tag data link settings (device parameters)

Transfer 
specifica-
tions

Media access 
method

CSMA/CD

Modulation method

Baseband

Transmission paths

Star form

Baud rate

100 Mbit/s (100Base-TX)

Transmission media

Shielded twisted-pair (STP) cable

Categories: 100 

Ω

 at 5, 5e

Transmission dis-
tance

100 m (distance between hub and node)

Number of cascade 
connections

There is no limitation when a switching hub is used.

Current consumption (Unit)

410 mA max. at 5 V DC

Weight

94 g max.

Dimensions

31 

×

 90 

×

 65 mm (W 

×

 H 

×

 D)

Other general specifications

Other specifications conform to the general specifications of the CJ-series.