W4S1-03B - Omron

3-port basic ethernet switch, with QoS for EtherNet/IP..

W4S1-05C - Omron

5-port advanced ethernet switch, with QoS for EtherNet/IP and error/storm detection..

W4S1-05B - Omron

5-port basic ethernet switch, with QoS for EtherNet/IP..