Introduction

　　The VMIACC-5595 is a managed hub designed to operate with the GE Fanuc Embedded Systems’ VMIxxx-5565 family of Reflective Memory real-time network products. The Reflective Memory hub can automatically bypass ports when it detects a loss of signal or the loss of valid synchronization patterns, allowing the other nodes in the network to remain operational. Since the optical ports are implemented with small form factor pluggable (SFP) transceivers, only the required ports need to be populated. The VMIACC-5595 SFP transceivers can be a combination of either multimode (short distance) or single-mode (long distance) transceivers. This feature permits a cost saving in small networks as well as system optimization. For larger networks, several VMIACC-5595 assemblies can be cascaded, permitting a managed hub array with up to 256 nodes. Each port regenerates the serial optical signal, eliminating the problems with insertion losses and cable attenuation. Signal regeneration also reduces jitter. The RS232 port gives you the ability to monitor and control your Reflective Memory network through a simple PC serial port. The Ethernet port feature allows you to monitor and control the hub from great distances through a local area network (LAN) or via a Web browser.

　　As an option, the VMIACC-5595 can be configured as a 19-inch 1U rack-mountable enclosure or as a desktop enclosure. The universal power supply permits operation with nearly any international power standard.

　　Product Overview

　　The VMIACC-5595 automatically bypasses ports when the absence of valid synchronization patterns is detected. Three LEDs, adjacent to each port, provide a visual indication of the port status. Additional status indications and modes of operation are available through either the serial port or the Ethernet port.

　　Status information includes the detection of installed transceivers, the detection of signal (light), the detection of valid synchronization patterns and the port operation speed (2Gb/s). Control registers allow the channel bypass to be based on the absence of a single valid synchronization pattern or multiple synchronization patterns. A bypass can also be based simply on the loss of a signal (light). In addition, each port can be manually forced either active or bypassed regardless of the status indicators.

　　An additional control register permits the transmitter of any port to be manually disabled.

　　Front panel manual switches include a recessed momentary reset switch and a Gang Select switch. The Gang Select switch configures the VMIACC-5595 ports as one loop of eight ports or two separate loops of four ports each.

　　Functional Characteristics

　　Multimode Port Wavelength: 830 to 860nm

　　Multimode Cable Length: 300m (maximum)

　　Single-Mode (10km) Port Wavelength: 1,300 to 1,335nm

　　Single-Mode (10km) Cable Length: 10km (maximum)

　　Single-Mode (80km) Port Wavelength: 1,540 to 1,570nm

　　Single-Mode (10km) Cable Length: 80km (maximum)

　　Dark on Dark: The Dark on Dark option turns off the board’s transmitter if the receiver does not detect a signal (available for firmware versions 02.00 and later).

　　Ethernet Controller: 10BaseT interface is compliant with Transmission Control Protocol/Internet Protocol (TCP/IP) standards. Each hub assembly will have a unique MAC address. The hub assembly can operate on either a LAN or a wide area network (WAN).

　　The VMIACC-5595 includes a remote user interface available through a standard Ethernet connection. The remote interface is controlled by the use of standard HTML-based Web browsers.

　　The user interface presents status data, such as “loss of signal” and “sync detect” information. Bypass mode, “Dark on Dark’ and the ability to force each port on/off or automatic are supported. These settings are retained in NVRAM.

　　Physical/Environmental Specifications

　　Desktop Assembly Dimensions: 16.73 inches wide by 10.0 inches deep by (1U) 1.72 inches high. Dimensions do not include nonskid self-adhesive feet.

　　Rack Mount Assembly Dimensions: The basic dimensions are the same as the desktop assembly, but include two 1U rack mount brackets for the standard 19-inch rack.

　　Front Panel Connectors: There are eight industry-standard SFP transceivers. The SFP receptacles not populated with transceivers contain EMI dust plugs. There is one RJ45 Ethernet connector and one 9-pin female D-subminiature RS232 connector.

　　Cabling: Each installed SPF transceiver requires either one Duplex LC-type fiber-optic cable or two Simplex LC-type fiber-optic cables. The Simplex cables are best suited for cascading hubs. The Duplex cables can be used for all other interconnectivity.

　　Rear Panel Connectors: The rear panel contains a power entry module that includes a power ON/OFF switch, a 4A/250V fuse, and a globally accepted IEC receptacle.

VMIACC-5595-208 350-805595-208J.pdf

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