Page 63
J-Series Data Radio – User Manual
Part H – Installation & Commissioning
Introduction
All Ethernet radio modems need to be properly installed and
commissioned in order to function reliably. It is important that
installers are familiar with RF products / installations and are
equipped with appropriate tools necessary to ensure the ongoing
reliability of a communications system.
This informed is provided as a short form guide to assist with the
correct installation and commissioning of the J-Series Ethernet and
that important tests are made and recorded at each site for future
reference should a problem eventuate.
Installers should check that each J-Series Ethernet radio has been
programmed to suit their specific requirements before installation.
Installations play a critical role in network performance. It is
essential that the installation be performed in a professional
manner with careful attention and consideration to the following
items:
1. Adequate primary power cable - relative to the length of cable to
minimise voltage drop.
2. Shielded CAT-5 or CAT-6 Ethernet patch cable between the
J-Series radio and any external Ethernet equipment.
3. Shielded RS-232 data cable between the J-Series radio and any
external RS-232 equipment.
3. Low loss coax used for antenna feed line.
4. Careful termination of RF connectors.
5. A suitable antenna for the requirement.
6. Suitable placement of the antenna.
7. Adequate signal strength from the Access Point or Bridge radio.
TYPICAL INSTALLATION OVERVIEW
The following information should assist when installing and
commissioning a J-Series Ethernet system.
DATA CONNECTION
In industrial environments connection to any external device should
be by shielded CAT-5 or CAT-6 patch cable. A cables should be
routed with strain relief essential.
MOUNTING
The radio modem should be mounted in a cool, dry, and vibration
free environment. Mounting of the unit should be in a location
providing easy access to mounting screws and all connections.
POWER CONNECTIONS
The power required is:
Tx: Nominal 13.8 Volts DC @ 800 mA (Max 1A)
Rx: Nominal 13.8 Volts DC @ 150 mA
Rated Operating Voltage 10 - 30 Volts DC
The J-Series Radio is supplied with the a mating DC power
connector:
Phoenix Contact Part Number 1777989. The DC Power connector
should be installed with the locking screws done up tightly. Cable
must be #22 AWG or larger, 70
o
C min. temperature rating. CSA
maximum current rating: 2.5A.
The J-Series Ethernet radio modem will operate from a 10 to 30
volt (filtered) DC supply. The radio is designed to self protect from
permanent damage if the voltage exceeds 30V dc or if reverse
polarity is applied. The replaceable internal fuse has a rating 3
Amp.
The radio modem can be damaged if there is any potential
difference between the chassis-ground, RS232 signal ground,
power (-) input, or antenna coaxial shield.
Before connecting any wiring, ensure all components are earthed
to a common ground point (please pay particular attention to 24V
PLC power systems where DC-DC converters are used).
Connect the antenna, Ethernet and RS 232 plugs BEFORE
applying power to the unit. Lastly, before inserting the power plug,
please re-check that the polarity and voltage on the DC power plug
is correct using a multimeter.
COAX CABLE CONNECTION
It is important to select the correct cable and connectors for
each application as a poor selection can seriously degrade the
performance of the system.
As an example, for each 3dB of cable and connector loss, half
the transmitter power is lost and twice the receiver signal power is
required to produce the same bit error rate.
In some installations where strong signals are present, a
compromise of cable and connector cost may be acceptable.
It is essential that all connector termination’s are performed as
per the manufacturers specifications (especially at 900MHz and
above) and if connectors are to be used outside, it is essential that
a sealant such as amalgamating tape be used to seal connectors.
DO NOT use acetic cure silicon to seal the connectors.
It is also important that coax cables are not stressed by tight
bends, kinking or excessive flexing. Ensure that coax cables have
sufficient strain relief and are secure. If large diameter rigid or semi
rigid cable is used, it is recommended to use a short length of high
quality RG223 cable between the unit and main cable feed.
Содержание JR240
Страница 1: ...J Series Ethernet Radio User Manual ...