User's Guide

Table Of Contents

EVR-VPXDOC-0036 VP Series 2000 User Guide

DIVIGRAPH

Rev 2.4.1

September 2021

Mesh Topology

A mesh topology creates redundant communication paths for devices on the network. Mesh topologies

are suitable for networks that cover a large area. When planning a mesh network, it is critical to avoid a

choke point, where many devices attempt to connect to a single point. Avoid network topologies that

require more than three hops and too many devices routed through a single device, creating a choke

point.

Plan Device Placement

We recommend a site survey and device placement plan for wireless installations. To plan device

placement, obtain or develop an accurately scaled site plan detailing the placement of the machinery

you need to monitor, including architectural details like walls and pillars. Then complete a site survey

and plan.

To develop a survey and plan:

1. On the accurately scaled site plan, mark the locations where you need to install sensors.

• Mount sensors as close as possible to the machine point being monitored.

• To avoid destructive interference, install devices at least 500 mm (20 inches) apart.

• Whenever possible, avoid obstructions such as machinery or walls that might “hide” devices

from routing devices or access point antennae.

• Allow clearance for mechanical installation and suitable clearance around the top (100 mm or 4

inches).

• If possible, install devices at least two meters (6 ½ feet) above ground level with clear line of site

to at least two other devices.

2. Determine the optimal wireless range for each device. Use the map scale and draw a circle

representing the nominal radio frequency range around the proposed location of each VP Series 2000

device. (When connecting to a backbone router or an access point, the range is about 50% greater).

3. Identify the locations of any existing gateways, routers, or access points.

• If you are installing sensors in extremely congested plant areas or in areas with insufficient

wireless connectivity, consider installing additional gateways, backbone routers or access points.

• Add locations where you need to install additional gateways, backbone routers or access points.

When placing gateways, backbone routers or access points, consider the location of line power

and suitable connections to the existing plant network.

Place gateways, backbone routers or access points in locations so that as many devices as possible can

connect directly to each gateway, backbone router or access point.

Refer to your network hardware vendor documentation for the maximum number of devices supported.

When the device is placed among:

Draw a circle with:

Dense metal structures with no line-of-sight

25 m (82 ft) radius

Sparse metal structures with limited line-of-sight

50 m (164 ft) radius

Unobstructed, clear line-of-sight locations

100 m (328 ft) radius