Ordering Information

Specifications Current
Product name Accessories Model Standards
Functions No. of ports Failure detection consumption (A)
Quality of Service (QoS): 3 NO W4S1-03B
Industrial EtherNet/IP control data priority · Power supply connector UC, CE
5 NO W4S1-05B
Failure detection: 0.22
Switching Hubs Broadcast storm and LSI error detection · Power supply connector
10/100BASE-TX, Auto-Negotiation 5 YES · Connector for informing error W4S1-05C CE

Summary of Functions Dimensions (Unit: mm) Industrial Switching Hubs

W4S1-03B W4S1-05B W4S1-05C W4S1-03B
No. of ports (RJ45) 3 5 5
Ethernet standards
Auto MDI/MDI-X
IEEE 802.3 10BASE-T,100BASE-TX
Supported Supported Supported
78 25
1.2 W4S1-
Auto Negotiation Supported Supported Supported
Store-and-Forward system Supported Supported Supported
Buffer 80 KB Provides the environmental resistance and

25°
MAC addresses 2,000
SW-LSI and microcomputer
functionality required in factory automation

90
Not supported Not supported Supported

25°
error detection

65.6
Broadcast storm detection Not supported Not supported Supported
built around Industrial Ethernet communications.

44.6
25°
QoS for EtherNet/IP Supported Supported Supported

23.6
SNMP Not Supported Not Supported Not Supported

25°
8
VLAN Not Supported Not Supported Not Supported

5.1
13.5
STP Not Supported Not Supported Not Supported 82.6
MOVING POSITION
IGMP Snooping Not Supported Not Supported Not Supported 2.72
Port mirroring Not Supported Not Supported Not Supported
W4S1-05B
Specifications W4S1-05C
78 48
Power supply voltage 24 VDC ±5% 10.3 10.3
1.92 W max, (WS41-03B)
Power consumption
2.88 W max, (WS41-05B/WS41-05C)
Inrush current lp = 1.42 A
Switching capacity 3-port model: 500 Mbps

25°
(Switching fabric) *1 5-port model: 700 Mbps
Throughput *2
90

148,800 pps

25°

65.6
1 mA at 250 VAC for 1 minute

44.6
Dielectric strength (Between LAN connectors, between error output connectors,
25°
and between FG and power supply connectors)

23.6
EMI and EMS EN: 61000-6-4 2007 and EN: 61000-6-2 2005
25°
8

5.1
Vibration and shock resistance Complies with JIS C60028-2-6 and JIS C60068-2-27

13.4
82.6
Setting method Settings are made in the Switching Hub. MOVING POSITION
6.9
Ambient operating environment No corrosive gas
23
Ambient operating temperature 0 to 55°C (with no icing and no condensation)
13.72
Ambient operating humidity 10% to 90% (with no condensation)
Ambient storage temperature -20 to 75°C (with icing and no condensation)
International standards (See note.) EC Directives
Note: Contact your OMRON representative for further details and applicable conditions for these standards.
*1. Switching capacity per Unit.
*2. Maximum throughput for 64-byte data at 100 Mbps.
Throughput per port. There is no difference between the models (3-port and 5-port models).

The application examples provided in this catalog are for reference only. Check functions and safety of the equipment before use.
Never use the products for any application requiring special safety requirements, such as nuclear energy control systems, railroad systems, aviation systems, medical equipment, amusement
machines, vehicles, safety equipment, or other application involving serious risk to life or property, without ensuring that the system as a whole has been designed to address the risks, and
that the OMRON products are properly rated and installed for the intended use within the overall equipment or system.

Warranty and Limitations of Liability LIMITATIONS OF LIABILITY

OMRON SHALL NOT BE RESPONSIBLE FOR SPECIAL, INDIRECT, OR CONSEQUENTIAL
WARRANTY DAMAGES, LOSS OF PROFITS, OR COMMERCIAL LOSS IN ANY WAY CONNECTED WITH
OMRON's exclusive warranty is that the products are free from defects in materials and THE PRODUCTS, WHETHER SUCH CLAIM IS BASED ON CONTRACT, WARRANTY,
workmanship for a period of one year (or other period if specified) from date of sale by NEGLIGENCE, OR STRICT LIABILITY.
OMRON. In no event shall the responsibility of OMRON for any act exceed the individual price of the
OMRON MAKES NO WARRANTY OR REPRESENTATION, EXPRESS OR IMPLIED, product on which liability is asserted.
REGARDING NON-INFRINGEMENT, MERCHANTABILITY, OR FITNESS FOR PARTICULAR IN NO EVENT SHALL OMRON BE RESPONSIBLE FOR WARRANTY, REPAIR, OR OTHER
PURPOSE OF THE PRODUCTS. ANY BUYER OR USER ACKNOWLEDGES THAT THE BUYER CLAIMS REGARDING THE PRODUCTS UNLESS OMRON'S ANALYSIS CONFIRMS THAT THE
OR USER ALONE HAS DETERMINED THAT THE PRODUCTS WILL SUITABLY MEET THE PRODUCTS WERE PROPERLY HANDLED, STORED, INSTALLED, AND MAINTAINED AND
REQUIREMENTS OF THEIR INTENDED USE. OMRON DISCLAIMS ALL OTHER WARRANTIES, NOT SUBJECT TO CONTAMINATION, ABUSE, MISUSE, OR INAPPROPRIATE MODIFICATION
EXPRESS OR IMPLIED. OR REPAIR.

Note: Do not use this document to operate the Unit.

OMRON Corporation Industrial Automation Company Authorized Distributor:

Tokyo, JAPAN
Contact: www.ia.omron.com
Regional Headquarters
OMRON EUROPE B.V. OMRON ELECTRONICS LLC
Wegalaan 67-69-2132 JD Hoofddorp One Commerce Drive Schaumburg,
The Netherlands IL 60173-5302 U.S.A.
Tel: (31)2356-81-300/Fax: (31)2356-81-388 Tel: (1) 847-843-7900/Fax: (1) 847-843-7787

OMRON ASIA PACIFIC PTE. LTD. OMRON (CHINA) CO., LTD. © OMRON Corporation 2009-2013 All Rights Reserved.
No. 438A Alexandra Road # 05-05/08 (Lobby 2), Room 2211, Bank of China Tower, In the interest of product improvement,
Alexandra Technopark, 200 Yin Cheng Zhong Road, specifications are subject to change without notice.
Singapore 119967 PuDong New Area, Shanghai, 200120, China Printed in Japan
Tel: (65) 6835-3011/Fax: (65) 6835-2711 Tel: (86) 21-5037-2222/Fax: (86) 21-5037-2200 Cat. No. V227-E1-03 0413 (1008)
Environmentally Resistant and Highly Reliable
Ethernet Communications for Production Sites
The W4S1 Switching Hub from OMRON is a low-cost, unmanaged switch that does not require software settings to maintain superior
reliability and consistent control data performance on an Ethernet/IP network. It can be used with confidence because it carries a brand
name well known at production sites and because it is backed by OMRON’s total support package for products ranging from PLCs to
switching hubs.

Environmentally Resistant Full Line of Products

Perfect Fit for Factory Automation Environments The 3- or 5-port Product Variation Ensures
Tough environmental resistance assures users that the W4S1 Switching Hub can perform in any
environment where PLCs and robots are found. Add to this simple DIN track mounting and well-thought
the Right Product Choice
out cable mounting angles and the result is a significant reduction in the man-hours and space We offer a low-cost 3-port model
requirements for control panel installation. that can be used as easily as
a T-branch to let you select
Tempe
rature the best model for your
application.
Noise
Vibratio
n

DIN tra
ck mou
24 VDC nting 3-port model 5-port model

Static e
lectricit Maintaining EtherNet/IP Performance
y

Highly Reliable
Quality of Service (QoS) without Support Software
The QoS (packet prioritization control) for EtherNet/IP ensures high-speed delivery
Enhanced Network Reliability of control data even if it is dispersed among images and similar data-intensive
applications. And complex software settings are eliminated because QoS can be
The W4S1 Switching Hub is an unmanaged switch that is fully capable of failure detection and broadcast enabled with a DIP switch setting.
storm detection. It improves network reliability by notifying users immediately via contact outputs and
LED indicators when an error occurs to quickly pinpoint the location of the error.
Control data Image data

Failure Notification Node 1

LED in
LED indicators and dicators Prioritizes and sends
control data.
external outputs notify
users when an SW-LSI or
microcomputer error has
Error d
occurred. etectio Industrial Switching Hubs
n

Broadcast Storm Detection and Suppression

Node 2 Node 3
The W4S1 Switching Hub detects and suppresses broadcast storms that occur
when switches are accidentally connected in a loop.

LED in
No Support Software required.
dicators
Simply turn ON a DIP switch
pin to enable QoS.

Broadcast storms that

exceed the threshold are
detected and removed.

Company names and product names in this document are the trademarks or registered trademarks of their respective companies.
Environmentally Resistant and Highly Reliable
Ethernet Communications for Production Sites
The W4S1 Switching Hub from OMRON is a low-cost, unmanaged switch that does not require software settings to maintain superior
reliability and consistent control data performance on an Ethernet/IP network. It can be used with confidence because it carries a brand
name well known at production sites and because it is backed by OMRON’s total support package for products ranging from PLCs to
switching hubs.

Environmentally Resistant Full Line of Products

Perfect Fit for Factory Automation Environments The 3- or 5-port Product Variation Ensures
Tough environmental resistance assures users that the W4S1 Switching Hub can perform in any
environment where PLCs and robots are found. Add to this simple DIN track mounting and well-thought
the Right Product Choice
out cable mounting angles and the result is a significant reduction in the man-hours and space We offer a low-cost 3-port model
requirements for control panel installation. that can be used as easily as
a T-branch to let you select
Tempe
rature the best model for your
application.
Noise
Vibratio
n

DIN tra
ck mou
24 VDC nting 3-port model 5-port model

Static e
lectricit Maintaining EtherNet/IP Performance
y

Highly Reliable
Quality of Service (QoS) without Support Software
The QoS (packet prioritization control) for EtherNet/IP ensures high-speed delivery
Enhanced Network Reliability of control data even if it is dispersed among images and similar data-intensive
applications. And complex software settings are eliminated because QoS can be
The W4S1 Switching Hub is an unmanaged switch that is fully capable of failure detection and broadcast enabled with a DIP switch setting.
storm detection. It improves network reliability by notifying users immediately via contact outputs and
LED indicators when an error occurs to quickly pinpoint the location of the error.
Control data Image data

Failure Notification Node 1

LED in
LED indicators and dicators Prioritizes and sends
control data.
external outputs notify
users when an SW-LSI or
microcomputer error has
Error d
occurred. etectio Industrial Switching Hubs
n

Broadcast Storm Detection and Suppression

Node 2 Node 3
The W4S1 Switching Hub detects and suppresses broadcast storms that occur
when switches are accidentally connected in a loop.

LED in
No Support Software required.
dicators
Simply turn ON a DIP switch
pin to enable QoS.

Broadcast storms that

exceed the threshold are
detected and removed.

Company names and product names in this document are the trademarks or registered trademarks of their respective companies.
 Ordering Information
International Standards
• The standards are abbreviated as follows: UC: cULus and CE: EC Directives.
• Contact your OMRON representative for futher details applicable conditions for these standards.
Specifications Current
Product name Accessories Model Standards
Functions No. of ports Failure detection consumption (A)
Quality of Service (QoS): 3 NO 0.22 W4S1-03B
Industrial EtherNet/IP control data priority · Power supply connector UC, CE
5 NO W4S1-05B
Failure detection: 0.22
Switching Hubs Broadcast storm and LSI error detection · Power supply connector
10/100BASE-TX, Auto-Negotiation 5 YES · Connector for informing error W4S1-05C CE

Summary of Functions Dimensions (Unit: mm)

W4S1-03B W4S1-05B W4S1-05C W4S1-03B
No. of ports (RJ45) 3 5 5
Ethernet standards IEEE 802.3 10BASE-T,100BASE-TX 78 25

Auto MDI/MDI-X Supported Supported Supported 1.2

Auto Negotiation Supported Supported Supported

Store-and-Forward system Supported Supported Supported
Buffer 80 KB

25°
MAC addresses 2,000
SW-LSI and microcomputer

90
Not supported Not supported Supported

25°
error detection

65.6
Broadcast storm detection Not supported Not supported Supported

44.6
25°
QoS for EtherNet/IP Supported Supported Supported

23.6
SNMP Not Supported Not Supported Not Supported

25°
8
VLAN Not Supported Not Supported Not Supported

5.1
13.5
STP Not Supported Not Supported Not Supported 82.6
IGMP Snooping Not Supported Not Supported Not Supported MOVING POSITION
2.72
Port mirroring Not Supported Not Supported Not Supported
W4S1-05B
Specifications W4S1-05C
78 48
Power supply voltage 24 VDC ±5%
10.3 10.3
Power consumption 5.28 W max
Inrush current lp = 1.42 A
Switching capacity 3-port model: 500 Mbps
(Switching fabric) *1 5-port model: 700 Mbps

25°
Throughput *2 148,800 pps
1 mA at 250 VAC for 1 minute
90

25°
Dielectric strength (Between LAN connectors, between error output connectors,

65.6
and between FG and power supply connectors)

44.6
EMI and EMS EN: 61000-6-4 2007 and EN: 61000-6-2 2005 25°

23.6
Vibration Resistance JIS C60068-2-6 conforming, 5 to 8.4Hz, 3.5mm amplitude, 8.4 to 150 Hz, acceleration 9.8m/s2
25°
8

Shock Resistance JIS C60068-2-27 conforming, 196m/s2

5.1
13.4
Setting method Settings are made in the Switching Hub. 82.6
MOVING POSITION
Ambient operating environment No corrosive gas 6.9

Ambient operating temperature 0 to 55°C (with no icing and no condensation) 23

Ambient operating humidity 10% to 90% (with no condensation) 13.72

Ambient storage temperature -20 to 75°C (with icing and no condensation)

International standards (See note.) EC Directives
Note: Contact your OMRON representative for further details and applicable conditions for these standards.
*1. Switching capacity per Unit.
*2. Maximum throughput for 64-byte data at 100 Mbps.
Throughput per port. There is no difference between the models (3-port and 5-port models).
The application examples provided in this catalog are for reference only. Check functions and safety of the equipment before use.
Never use the products for any application requiring special safety requirements, such as nuclear energy control systems, railroad systems, aviation systems, medical equipment, amusement
machines, vehicles, safety equipment, or other application involving serious risk to life or property, without ensuring that the system as a whole has been designed to address the risks, and
that the OMRON products are properly rated and installed for the intended use within the overall equipment or system.

Warranty and Limitations of Liability LIMITATIONS OF LIABILITY

OMRON SHALL NOT BE RESPONSIBLE FOR SPECIAL, INDIRECT, OR CONSEQUENTIAL
WARRANTY DAMAGES, LOSS OF PROFITS, OR COMMERCIAL LOSS IN ANY WAY CONNECTED WITH
OMRON's exclusive warranty is that the products are free from defects in materials and THE PRODUCTS, WHETHER SUCH CLAIM IS BASED ON CONTRACT, WARRANTY,
workmanship for a period of one year (or other period if specified) from date of sale by NEGLIGENCE, OR STRICT LIABILITY.
OMRON. In no event shall the responsibility of OMRON for any act exceed the individual price of the
OMRON MAKES NO WARRANTY OR REPRESENTATION, EXPRESS OR IMPLIED, product on which liability is asserted.
REGARDING NON-INFRINGEMENT, MERCHANTABILITY, OR FITNESS FOR PARTICULAR IN NO EVENT SHALL OMRON BE RESPONSIBLE FOR WARRANTY, REPAIR, OR OTHER
PURPOSE OF THE PRODUCTS. ANY BUYER OR USER ACKNOWLEDGES THAT THE BUYER CLAIMS REGARDING THE PRODUCTS UNLESS OMRON'S ANALYSIS CONFIRMS THAT THE
OR USER ALONE HAS DETERMINED THAT THE PRODUCTS WILL SUITABLY MEET THE PRODUCTS WERE PROPERLY HANDLED, STORED, INSTALLED, AND MAINTAINED AND
REQUIREMENTS OF THEIR INTENDED USE. OMRON DISCLAIMS ALL OTHER WARRANTIES, NOT SUBJECT TO CONTAMINATION, ABUSE, MISUSE, OR INAPPROPRIATE MODIFICATION
EXPRESS OR IMPLIED. OR REPAIR.
Note: Do not use this document to operate the Unit.

OMRON Corporation Industrial Automation Company Authorized Distributor:

Tokyo, JAPAN
Contact: www.ia.omron.com
Regional Headquarters
OMRON EUROPE B.V. OMRON ELECTRONICS LLC
Wegalaan 67-69-2132 JD Hoofddorp One Commerce Drive Schaumburg,
The Netherlands IL 60173-5302 U.S.A.
Tel: (31)2356-81-300/Fax: (31)2356-81-388 Tel: (1) 847-843-7900/Fax: (1) 847-843-7787

OMRON ASIA PACIFIC PTE. LTD. OMRON (CHINA) CO., LTD. © OMRON Corporation 2009-2013 All Rights Reserved.
No. 438A Alexandra Road # 05-05/08 (Lobby 2), Room 2211, Bank of China Tower, In the interest of product improvement,
Alexandra Technopark, 200 Yin Cheng Zhong Road, specifications are subject to change without notice.
Singapore 119967 PuDong New Area, Shanghai, 200120, China CSM_5_1_1015 Printed in Japan
Tel: (65) 6835-3011/Fax: (65) 6835-2711 Tel: (86) 21-5037-2222/Fax: (86) 21-5037-2200 Cat. No. V227-E1-03 0413 (1008)