Ethernet switch in PC/104 format

25 May 2011 Computer/Embedded Technology

Diamond Systems has unveiled Epsilon, a Layer 2 managed Ethernet switch module offering eight 10/100/1000 Mbps copper twisted pair ports on a PC/104 form-factor board.

Epsilon can be used standalone without any connection to a single board computer, or in conjunction with a host CPU. The module’s built-in microcontroller handles configuration and management. Onboard memory holds dual application images, boot code, MAC addresses and other parameters, and can also be used for program execution. An RS232 serial port enables communication between the module’s onboard management microcontroller and a host processor. Epsilon’s built-in microcontroller is also accessible via a web management interface over one of the Ethernet ports.

The board features a 176 KB onboard frame buffer; DSCP remarking for IPv4 and IPv6 frames; full-duplex flow control (IEEE 802.3X) and half-duplex backpressure, symmetric and asymmetric; multicast and broadcast storm control, as well as flooding control; multiple protocol support: IEEE 802.1D, IEEE 802.1w, IEEE 802.1s and IEEE 802.1X.

Epsilon provides a full PC/104 stackthrough bus interface, allowing it to be integrated into any PC/104 stack. However, the module does not interface to the PC/104 bus and does not require it for its operation. The PC/104 stackthrough connectors are not installed in the standard version, but are available as a special-order option.

Input power can be provided through the built-in 7–36 V d.c. power supply, enabling operation using industrial power sources. Alternatively, it can be powered from a 5 V d.c. source. To support the temperature extremes of fixed and mobile applications in both indoor and outdoor environments, the module supports fanless operation over -40°C to +85°C. Epsilon is supplied with all required firmware and drivers, enabling its immediate operation without any development effort. The included web interface provides an intuitive GUI for use in configuring and managing switch functionality.

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