Control Network Newsletter
EISW Ethernet Switches Are UL Listed for Industrial Control Equipment
Contemporary Controls' EISW series of unmanaged switches provide robust and reliable performance even in demanding environments. The EISW switches are UL Listed as Information and Communication Technology Equipment under safety standard UL 62368-1 and can be installed in a UL 508A panels without invalidating the control panel listing.
UL 508A Standard covers industrial control panels intended for general industrial use, operating from a voltage of 1000 volts or less. This equipment is intended for installation in ordinary locations, in accordance with the National Electrical Code, ANSI/NFPA 70, where the ambient temperature does not exceed 40°C (104°F) maximum.
The EISW series consists of 5, 8, and 16-port 10/100 Mbps Ethernet switches that can be DIN-rail mounted in control panels and powered from a NEC class 2 limited energy power source. Available with five, eight, and sixteen ports, the EISW switches provide 10/100 Mbps performance on all ports to accommodate a range of control devices and workstations commonly found in automation projects. In addition, a wide operating temperature range of –40°C to +75°C makes them suitable for demanding outdoor applications.
The units feature dual power inputs with wide-ranging voltages (12-48 VDC or 24 VAC) and support two independent DC powering options for redundant back-up power schemes.
A fault relay monitors power for remote alarm triggering—a normally open (NO) fault relay contact held closed opens upon a P1 or P2 power failure.
The switches support plug-and-play operation and require no configuration. All ports automatically configure their data rate and duplex using auto-negotiation protocol. Depending on the capability of the link partner, communication is set at 10 or 100 Mbps and at either half- or full-duplex. Models are available with five, eight, or sixteen Auto-MDIX ports for attaching local devices. Each port has an LED that glows with an established link and flashes with activity which assists in troubleshooting connection issues. Each port on the 16-port switch also has a speed LED that glows amber for a 100 Mbps link.
These low-cost, compact units are encased in a rugged steel enclosure, with both DIN-rail and wall mounting installation. The durable, compact units are easy-to-install, operate, and maintain. The EISW5 and EISW8 models offer 1K MAC address support, and the EISW16 provides 16K MAC address and Jumbo Frame support to accommodate the requirements of next-generation networks.
Visit the EISW Switch Series product page to learn more.