Applications

The DIN-rail mountable 560NMD11 is a manageable plug-and-play Layer 2 switch.

It offers four auto-negotiating Fast Ethernet RJ45 ports with automatic MDI/X (automatic cross detection and correction),

A two-wire SDSL port for dedicated copper cables and an SFP (Small Form Factor Pluggable) module slot for fibre optic transceivers.

Ethernet can be distributed within the station via the switch’s four RJ45 ports.

The SDSL port can be used to connect copper stations with a maximum distance of 20 km (0.8 mm diameter).

Depending on the SFP modules fitted, the device can achieve spans www.ge-drive.com of up to 40 km over fibre-optic cables.

The switch provides a redundant topology via (fast) spanning tree protocol.

For documentation purposes, the Ethernet ports are labelled 1 to 4. The SDSL ports are connected via snap-in connectors.

There is no specific uplink port. All ports are functionally identical.

The link and speed status of each Ethernet port and SDSL port is indicated by the status indicators on the right (see ‘Connectors and Indicators’).

SFP-related indicators are located on the left.

The switch learns the Ethernet address by analysing incoming frames and stores it in a lookup table

(up to 2048 entries), which is used to forward the frame to the correct port only.

If a broadcast or multicast frame is received, or if the destination address is not found in the lookup table, the

then the received frame is forwarded to all ports other than the receiving port.

If an incoming frame with a specific source address does not refresh the entry in the lookup table, the entry is aged out for a certain period of time.

then it is aged out for up to 304 seconds (default, configurable).

With respect to IEEE 802.1Q VLAN frames, the switch can be configured in VLAN or transparent mode.

In transparent mode, the switch does not change any frames or frame TAGs;

In VLAN mode, the switch can be configured to support multiple applications, such as trunks or access ports.

The switch can support quality of service if it uses IEEE 802.1p-compliant frame formats.

The switch can divide frames into up to four queues, which can be configured as priority-based queues or weighted fair queues.

The 560NMD11 uses a wide-range power supply and operates from 24 to 60 V. The switch itself, the Ethernet ports, and the Ethernet ports can be connected to the switch.

The switch itself, the Ethernet ports, as well as the SDSL connections, RS-232 interfaces, and SFP transceivers are hot-swappable.

Connectors and Indicators

The 560NMD11 switch consists of four equal RJ45 Ethernet ports, an SDSL transceiver,

one SFP transceiver slot, and two RS-232 connectors for configuring and transferring serial data.

Each RJ45 port can be connected to a Cat. 3 (10 Mbps) or Cat. 5 (100 Mbps) Ethernet cable with a maximum length of 100 metres. The cables can only be used for internal connections.

Crossover cables are not required because the RJ45 ports of the 560NMD11 switch support automatic MDI/X.

The SDSL interface can be connected to a customer-provided two-wire copper cable. 0.8 diameter copper cable has a maximum connection distance of 20 km and a transmission rate of 192 kbps.

Depending on the distance, the transmission rate can be configured up to 11 Mbps.

The status of the Ethernet and DSL interfaces can be monitored by two LEDs.

For the Ethernet port, these are located on the lower and upper part of the RJ45 socket.