Hitachi Energy 560NMD01 Managed Layer 2 Switch

Applications

The 560NMD01 Top Hat DIN-Rail Appliance is a managed Layer 2 switch.

It provides four Fast Ethernet RJ45 ports with automatic MDI/X (Automatic Cross Detection and Correction) and a 2-wire SDSL interface.

The SDSL interface can be used to connect sites with distances of up to 20 km (copper cable, 0.8 mm diameter).

Thanks to the (fast) Spanning Tree Protocol, the switch enables a redundant topology.

For documentation purposes, Ethernet ports are labelled with numbers 1-4. There are no special uplink ports. All ports are functionally identical.

The SDSL ports are externally connected via backplane or expansion connectors. The connection (link) and speed status of all Ethernet and SDSL ports is indicated by LEDs on the front panel.

The switch "learns" Ethernet addresses by analysing received frames.

The addresses learned in this way are stored in the address table (up to 2048 entries) and are used to forward the frames to the correct interface.

Frames are forwarded to all interfaces only if they are received with a wide or multicast address, or if the destination address is not found in the address table.

If an entry in the address table is not acknowledged by the corresponding received frame, it is deleted after a maximum of 304 seconds (default).

IEEE 802.1Q-compliant VLAN configuration is supported. Frames can be transparently forwarded or assigned to (access or trunk) VLANs.

The switch can support quality of service if IEEE 802.1p-compliant frame formats are used. The switch can divide outbound frames into up to four priority-controlled queues.

The device has a wide-range power supply, requiring a voltage between 24 and 60 V. The switch can be used with a wide range of power supplies.

The Ethernet interface, SDSL, RS232 (Con 0) and the expansion bus interface (Ext) can be plugged in during operation (hot-swap).

Connectors and indicators

The 560NMD01 device provides four equivalent Ethernet interfaces with RJ-45 connectors, an SDSL interface and an RS232 interface that are

for configuration and transfer of serial data. Each RJ-45 port can be connected via Cat.3 (10Mbps) or Cat.5 (100Mbps) network cable.

for internal communications up to 100 metres. Support for MDI/X means that crossover Ethernet cables are not required.

The SDSL interface can be connected via a two-wire copper cable. The maximum connection distance is 20 kilometres using a 0.8 mm diameter copper cable with a transmission rate of 192 kbps.

Depending on the distance, the transmission rate can be increased to a maximum of 11 Mbps.

The status of all interfaces can be monitored by two LEDs. For Ethernet interfaces, these are located on the lower and upper part of the RJ45 socket.