Honeywell XYR301E, User Manual

Page: 19 / 108

User Manual XYR301E Wireless Ethernet
34-XY-25-41 Page 19
Chapter Two INSTALLATION
2.0 General
The XYR301-E modules are housed in a rugged aluminium case, suitable for DIN-rail mounting. Terminals will accept
wires up to 2.5 mm
2
(12 gauge) in size.
All connections to the module must be SELV (Safety Extra Low Voltage). Normal 110-250V mains supply must
not be connected to any terminal of the XYR301-E module.
Refer to Section 2.3 Power Supply .
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 adjacent. Following installation, the most common problem is poor
communications caused by incorrectly installed antennas, or radio interference on the same channel, or the radio path
being inadequate. If the radio path is a problem (i.e. path too long, or obstructed), a higher performance antennas or a
higher mounting point for the antenna may rectify the problem. Alternately, use an intermediate XYR301-E Module as
a repeater.
The XYR301-E
Installation Guide provides an installation drawing appropriate to most applications. Further
information is detailed below.
Each XYR301-E module should be effectively earthed via the "GND" terminal on the back of the module - this is to
ensure that the surge protection circuits inside are effective.
2.1 Antenna Installation
The XYR301-E module will operate reliably over large distances however the achievable distances will vary with the
application, radio model, type and location of antennas, the degree of radio interference, and obstructions (such as
buildings or trees) to the radio path.
The maximum range achievable depends on the radio model, the regulated RF power permitted in your country, and
whether you use separate transmit and receive antennas.

An XYR301-E (900MHz) with a single antenna, 6.2 miles can be achieved in USA, Canada (4W ERP) and
10km in Australia, New Zealand (1W ERP).
To achieve the maximum transmission distance, the antennas should be raised above intermediate obstructions so the
radio path is true “line of sight”. The modules will operate reliably with some obstruction of the radio path, although
the reliable distance will be reduced. Obstructions which are close to either antenna will have more of a blocking affect
than obstructions in the middle of the radio path.
The XYR301-E modules provide a diagnostic feature which displays the radio signal strength of transmissions (refer
Chapter 4 “Diagnostics”).
Line-of-sight paths are only necessary to obtain the maximum range. Obstructions will reduce the range, however may
not prevent a reliable path. A larger amount of obstruction can be tolerated for shorter distances. For short distances, it
is possible to mount the antennas inside buildings. An obstructed path requires testing to determine if the path will be
reliable - refer the section 6 of this manual.
Where it is not possible to achieve reliable communications between two XYR301-E modules, then a third XYR301-E
module may be used to receive the message and re-transmit it. This module is referred to as a repeater. This module
may also have a host device connected to it.
The XYR301-E unit has two antenna connections at the top of the module, allowing for two antennas to be fitted to the
module if need be. By default the right connector labeled TX/RX is the main connection used to transmitter and
receiver. The left connector labelled
―
RX is not connected unless configured under the Advanced Radio
Configuration in Section 3.10. Each antenna port can be configured for TX only, RX only or Diversity (TX and RX).
Selection can be made by choosing one of the options from TX Antenna / RX Antenna on the Advanced Radio
Configuration page.
Note: When only one antenna is used, it must be connected to the TX/RX connector.