Network Topology

The 450U-E is an Ethernet device, and must be configured as part of an Ethernet network. Each 450U-E module

must be configured as one of the following:

• Access point or client (station)

• Bridge or router

Access Point vs. Client

The 450U-E module that is configured as an access point acts as the wireless master. The access point accepts

and authorizes links initiated by the client modules, and controls the wireless communications. Clients (stations) are

slave modules, and become transparent Ethernet links when connected to the access point.

Figure 1 shows a connection between two Ethernet devices using 450U-E Ethernet modems. In this example, one

450U-E is configured as an access point and the other as a client.

The 450U-E modules are housed in a rugged aluminum case suitable for DIN rail mounting. The terminals will

accept wires up to 2.5 mm2 (12 gauge) in size. Before installing a new system, it is preferable to bench test the

complete system. Configuration problems are easier to recognize when the system units are close to one another.

Following installation, the most common problem is poor communications caused by incorrectly installed antennas,

radio interference on the same channel, or an inadequate radio path. If the radio path is a problem (the path is

too long, or obstructed), a higher performance antenna or a higher mounting point for the antenna may rectify the

problem. Alternatively, use an intermediate 450U-E module as a repeater.

Each 450U-E module should be effectively grounded via the “GND” screw on the back of the module to ensure that

the surge protection circuits inside are effective. The 450U-E Installation Guide provides details and an installation

drawing appropriate to most applications.