Features:
- Provides three auto-negotiating 10/100BASE-TX RJ45 ports.
- Uses store-and-forward switching with an 80 KB frame buffer.
- Can prioritize EtherNet/IP implicit messages through selectable QoS.
The three ports of W4S1-03B form one unmanaged Ethernet switching domain for local automation devices.
Auto negotiation and Auto MDI/MDI-X remove manual speed and crossover-cable selection from each connection.
QoS changes the order in which queued frames leave the switch but does not add VLAN, SNMP or spanning-tree management.
The Omron W4S1-03B W4S1 3-Port Industrial Switching Hub may still be available for purchase and support from Apter Power beyond End-Of-Life (EOL) by the manufacturer (OEM).
Omron W4S1-03B W4S1 3-Port Industrial Switching Hub Manuals,Datasheets,Link
Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.
How Ethernet frames move between the three ports
- Learning table: Source addresses populate the MAC table so known destinations use the required port.
- Store and forward: A complete frame is buffered before it is transmitted to the destination port.
- Unknown traffic: Frames without a learned destination are forwarded to the remaining ports.
How EtherNet/IP traffic is moved ahead
- Implicit messages: Cyclic EtherNet/IP I/O traffic receives the highest documented priority.
- IGMP packets: Multicast-management traffic follows the EtherNet/IP control class.
- Other frames: Remaining Ethernet traffic stays in the lower queue when QoS is enabled.
What local indicators reveal
- PWR: The green LED distinguishes an energized switch from loss of 24 V DC power.
- L/A: The link/activity LED separates no link, established link and active frame transfer.
- 100: The speed LED identifies a 100 Mbit/s link instead of a 10 Mbit/s link.
Functions not implemented in the unmanaged model
- No VLAN: Ports cannot be divided into separate virtual LANs by the switch.
- No SNMP: Remote management counters and configuration are not exposed through SNMP.
- No failure output: W4S1-03B does not include the abnormal-output connector used on the W4S1-05C.