TELEDYNE OLDHAM SIMTRONICS Everywhereyoulook BM 25A, User Manual

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BM 25A/AW
AREA GAS MONITOR
USER MANUAL
NPB25AEN
Revision D.0
23
4 Wireless Version
This product complies with FCC Maximum Permissible Exposure (MPE) requirements
when used with an approved antenna and the antenna is at least 20cm away from
the user. Use of the product closer than 20cm may exceed the MPE limits. Use of
any antenna other than approved antennas will invalidate the certification of the
product.
4.1 Overview
Available as an option, the radio communication allows several BM
25AWs to communicate on the same network (
BM 25 mode) or to
send information wirelessly to a MX40 or X40 controller
(CONTROLLER mode).
Wireless communication is made via a 2.4 GHz radio and emitted
power is less than 100 mW. Maximum distance between two
communicating devices is 3,300 feet line of sight. Up to 30 BM
25AWs can be meshed on the same network and up to 16 networks
can coexist with no interference.
The network topology used by the BM 25AW is a MESH network. In
a mesh network all hosts are connected peer to peer without central
hierarchy, thereby forming a net-like structure. Consequently, each
node can receive, send and relay data. This avoids having sensitive
points, which in case of failure, cut the connection of the network. If a
node is down, its neighbors go through another route.
Mesh topology allows fast and simple deployment, high coverage
versatility and high fault tolerance. It significantly reduces installation
and operating costs of networks. These solutions reproduce the
architecture of the Internet while optimizing for wireless.
Figure 20 : Wireless
version, recognizable by
the presence of an
antenna