ACR Electronics Marine Safety Devices ARX 50 User Manual

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Table of Contents  
SECTION 1 - HOW THE ARX-50 WORKS _________________________ 2  
SECTION 2 - PREPARING TO INSTALL ___________________________ 3  
SECTION 3 - INSTALLATION___________________________________ 5  
SECTION 4 - OPERATION _____________________________________ 6  
SECTION 5 - MAINTENANCE __________________________________ 9  
APPENDIX A - SPECIFICATIONS ________________________________ 9  
APPENDIX B - ACCESSORIES__________________________________ 10  
APPENDIX C - WARRANTY, USEFUL LIFE POLICY, NOTICES __________ 10  
PLEASE READ ALL WARNINGS, CAUTIONS  
AND NOTES CAREFULLY  
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SECTION 1 - HOW THE ARX-50 WORKS  
The ARX-50 alarm receiver is designed as a companion to the ACR radio  
beacon transmitter model number RBL-30 (Mini B™ ). It is intended to be  
300  
used in a crew overboard (COB) alerting application.  
When properly powered and fitted with an external antenna, the signals  
from the Mini B™  
transmitter can be received by the ARX-50 up to  
300  
several miles. While the ARX-50 may receive signals from other radio  
beacons, it is optimized for service with the ACR Mini B™ personal  
300  
beacon The ARX-50 is designed to accept ship’s power supply in the  
.
range of +10.5 to +28 V DC.  
SECTION 2 - PREPARING TO INSTALL  
Unpacking the ARX-50  
Before proceeding with the installation of the ARX-50, please verify that the  
content of the box includes the following:  
Quantity  
Item  
ARX-50 Alarm Receiver with attached I/O cable (1m)  
ARX-50 mounting bracket  
Monopole antenna  
Stainless steel #8 X 1” Phillips screws  
Warranty card  
1
1
1
4
1
1
1
Registration card  
ARX-50 Product Support Manual  
If you do not have all of the items, please call ACR Technical Support at  
+1(954) 981-3333.  
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Controls and indicators  
Mounting bracket  
Coaxial (BNC)  
connector  
Alarm  
indicator  
Speaker location  
On/Off switch  
Mode switch  
Signal  
strength  
meter  
Frequency  
selector switch  
Weather  
resistant  
polycarbonate  
housing  
I/O cable  
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Location selection  
Choose a dry, clean surface to install the ARX-50, giving consideration to  
the importance of the location. The user must be able to see the visual  
alarm and hear the audible alarm.  
CAUTION: When using the included antenna, the ARX-50 must be  
mounted vertically and the antenna must not be within 0.5 m of a metal  
panel or other metal objects.  
Ship’s power requirements  
The ARX-50 accepts ship’s power supply in the range of +10.5 to +28 V  
DC. A two-wire connection (ground negative) is required that is capable of  
supplying 120 mA average and up to 400 mA under an alarm condition at  
+10.5 to +28 V DC.  
SECTION 3 - INSTALLATION  
Mount the bracket  
After selecting the location, hold the ARX-50 bracket in position and use as  
a template to mark where the screws will be located.  
CAUTION: When mounting to a wall, avoid mounting to metal.  
Pre-drill holes of a smaller diameter than the screws, if appropriate for the  
material that the bracket will be attached to.  
Holding the bracket in place, screw the four supplied screws through the  
openings in the bracket to the mounting material, securing the screws  
tightly enough to allow for vibration, yet loose enough to avoid cracking the  
case.  
Snap the ARX-50 into its bracket vertically, antenna skyward. Double-check  
that the ARX-50 is seated and secure by manually testing it for stability.  
Install the monopole antenna  
Install the monopole antenna on the ARX-50 via the BNC connector. The  
open end of the antenna is attached to the connector by a clockwise  
motion. The antenna snaps into place, locking it.  
CAUTION: Proper installation of the monopole antenna is required to  
seal the ARX-50. If any antenna other than the included monopole antenna  
is used, the unit may not seal properly.  
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Connect the power supply  
The ship’s power supply is the source of power for the ARX-50. A one-  
meter I/O cable is supplied with the product.  
It is recommended that a qualified marine electronics professional or  
qualified electrician connect the power.  
Wiring  
The 1m I/O cable wiring chart is as follows:  
Signal  
Positive power (12 to 24V nominal)  
Ground  
Wire Color  
Red  
Black  
Speaker-  
Speaker+  
Relay- common  
Relay- normally open  
Brown  
Orange  
Yellow  
Green  
Installation options  
The ARX-50 is designed to be flexible, allowing for user preferences. For  
this reason, the system provides relay contacts for a variety of connections.  
The relay contacts output in the ARX-50 is a floating metallic switch that  
closes upon alarm receipt. It is capable of switching a circuit carrying up to  
two amps, at up to 30 volts. The contacts, which are normally open, can be  
used for a variety of purposes, including:  
Sending input to an external GPS to save position  
Switching to an external siren or bell for an alarm  
An external speaker may also be connected using the speaker wires on the  
I/O cable.  
NOTE: It is recommended that a qualified marine electronics professional  
or qualified electrician connect such optional devices. While ACR allows  
customized connections to the ARX-50, non-standard configurations are  
not supported by ACR due to the number of unknowns and variables  
involved.  
SECTION 4 - OPERATION  
Operation overview  
The ARX-50 is a 121.5 MHz radio beacon receiver that is part of a ship’s  
crew overboard (COB) system. To properly protect officers, crew and  
passengers from COB, each individual will need to wear or carry on their  
person a locator beacon such as an ACR Mini B™300 series beacon. If the  
beacon is activated in a COB situation, the ARX-50 receiver will detect the  
121.5 MHz signal. Audible and visual alarms will be triggered.  
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The ARX-50 has three large, circular push buttons and seven LEDs that  
indicate settings. The push buttons switch between alternate modes. Each  
button is assigned a set of functions. See Figure 1. Each button “beeps”  
when depressed. The LED indicators are either red or green to signify the  
system mode. Green LEDs signify that the system is in a normal state and  
red LEDs signify that the system is in an atypical state.  
Turn on the ARX-50  
The red OFF LED will be illuminated while the system is turned off, yet is  
still connected to a power supply. To turn on the ARX-50, depress the  
On/Off button. The LEDs will blink on and off, and the green On LED will  
illuminate. Set to default at the factory, the alarm mode is active on channel  
121.5 MHz. Some signal level indicators may flicker while the unit searches  
for a signal.  
Choose Alarm mode or Monitor mode  
Alarm mode  
The Alarm mode for the ARX-50 is the system’s default mode. In this mode,  
the radio beacon signal detector circuitry is activated, i.e., The system is  
ready to detect 121.5 MHz signals.  
In Alarm mode, the speaker is silenced until a 121.5 MHz beacon signal is  
detected, at which time a loud audible siren and a flashing bright red LED  
are activated.  
The ARX-50 detects an activated Mini B™  
beacon, and other activated  
300  
beacons that transmit 121.5 MHz signals.  
The ARX-50 is designed to only detect an alarm on 121.5 MHz signals that  
originate from an activated beacon.  
The signal strength meter is always active in this mode. If there is a strong  
signal that is not from a beacon, the signal strength will still be displayed on  
the signal strength meter, but the ARX-50 will not alarm.  
Monitor High mode  
This mode is intended for advanced users to obtain more information about  
a received signal.  
NOTE: The ARX-50 reverts back to Alarm mode after 15 minutes in  
Monitor High mode.  
In the monitor modes, the ARX-50 detector circuitry is deactivated. The  
demodulated 121.5 MHz audio signal is annunciated at all times. If there is  
not any signal on the 121.5 MHz carrier, whether activated beacon or other  
source, static will be audible. The speaker volume is high, and the signal  
strength meter is active.  
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Monitor Low mode  
This mode is identical to the Monitor High mode except that the speaker  
volume is lower.  
NOTE: The ARX-50 reverts back to Alarm mode after 15 minutes in  
Monitor High mode.  
Training mode  
Operation in Training mode is identical to the live radio beacon detection  
mode.  
In Training mode, the ARX-50 receives a special training frequency  
(typically 121.65 MHz or 121.775 MHz). This allows users to become  
familiar with the operation of the ARX-50 by using a special training beacon  
operating on the same frequency. This way, local Search and Rescue  
authorities are not notified.  
NOTE: The ARX-50 reverts back to 121.5 MHz after 1 hour in Training  
mode.  
Activation and alarm indicators  
The ARX-50 is a fully automatic monitor/receiver. In Alarm mode, once the  
ARX-50 detects a signal, a loud audible alarm will sound and a bright red  
LED will flash.  
Signal strength meter  
The eight LEDs on the signal strength meter are capable of indicating  
sixteen levels of received signal strength.  
The signal strength meter provides the user with an indication of how far  
away the 121.5 MHz signal might be. The higher the LEDs are illuminated,  
the stronger the 121.5 MHz transmitted signal is, and the closer the signal  
is relative to the ARX-50.  
The reverse is also true: The lower the lit LEDs are, the less signal  
strength, and the further away the beacon is relative to the ARX-50.  
NOTE: The signal strength meter may display a low level of activity any  
time that the ARX-50 is on. This is not to be mistaken for detection of a  
121.5 MHz beacon transmission.  
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SECTION 5 - MAINTENANCE  
The following maintenance schedule is recommended:  
Action  
Visual inspection  
Description  
Inspect the antenna, cables and  
connections. Ensure that the cable is  
attached properly and the unit has not been  
damaged.  
Frequency  
Every 6 months  
Performance  
test  
Verify that the system is operating by  
using the training mode with a training  
beacon  
Every year  
Clean exterior  
Using a mild, sudsy solution such as As needed  
dishwashing liquid, wipe the surface of  
the ARX-50 with a damp cloth to  
remove film, salt and sand  
APPENDIX A - SPECIFICATIONS  
General  
Carrier frequency  
Sensitivity  
VHF antenna  
121.5 MHz or 121.65 MHz, user selectable  
<0.2 µV (at antenna output)  
Flexible monopole  
Modulation  
Swept tone  
Electrical input power  
+10.5 V to +28 V DC, 120 mA average, 400 mA  
maximum  
Alert methods  
Bright red flashing led  
Loud audible alarm (≈70dBA @ 1m)  
External speaker connection (8v maximum)  
Relay contacts: normally open (2 A/30 V  
maximum)  
Regulation conformity  
Safety  
EMI/EMC  
IEC 60945, EN50371  
IEC 60945  
RoHS/WEEE  
Physical  
European Directive 2002/95/EC  
Dimensions  
Weather resistance  
5.3” X 3.7” X 1.5” (13.46 X 9.40 X 3.81cm)  
IP65 (when included monopole antenna is  
correctly installed)  
Operating temperature  
Storage temperature  
Weight  
-4°F to +131°F(-20°C to +55°C)  
-40°F to +158°F (-40°C TO +70°C)  
0.8 lbs (362.87 g)  
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APPENDIX B - ACCESSORIES  
The following are items that can be ordered for your alarm receiver:  
Description  
ACR Part Number  
2767  
Mini B™  
Mini B™  
ILS H ON (water activated)  
300  
300  
2
2766.6  
ILS (manually activated)  
APPENDIX C - WARRANTY, USEFUL LIFE POLICY,  
NOTICES  
Limited Warranty  
This product is warranted against factory defects in material and  
workmanship for a period of 1 (one) year* from date of purchase or receipt  
as a gift. During the warranty period ACR Electronics, Inc. will repair or, at  
its option, replace the unit at no cost to you for labor, materials and return  
transportation from ACR. For further assistance, please contact our  
Technical Service Department at ACR Electronics, Inc., 5757 Ravenswood  
Road, Fort Lauderdale, FL 33312-6645. Telephone: +1 (954) 981-3333,  
Fax: +1 (954) 983-5087, Email: [email protected].  
This warranty does not apply if the product has been damaged by accident  
or misuse, or as a result of service or modification performed by an  
unauthorized factory. Except as otherwise expressly stated in the previous  
paragraph, THE COMPANY MAKES NO REPRESENTATION OR  
WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, AS TO  
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR  
ANY OTHER MATTER WITH RESPECT TO THIS PRODUCT. The  
Company shall not be liable for consequential or special damages.  
To place the warranty in effect, register online at www.acrelectronics.com  
or return the attached card within 10 days.  
*Five years for the following products: EPIRB, PLB, S-VDR, SSAS.  
Useful Life Policy  
The typical service life of a properly maintained Product is limited to 12  
years from date of manufacture. Products that are 12 years and 1 month or  
older from date of manufacture will not be serviced by ACR or our Battery  
Replacement Centers. A Product that is 12 or less years old from date of  
manufacture will be serviced as long as the unit appears fit to be placed  
back into its final operational cycle. Service includes the replacement of  
those items that must be replaced at service intervals and the verification  
that the device appears to be in good mechanical and electrical working  
condition by an ACR authorized service technician.  
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FCC Compliance Statement  
NOTE: This equipment has been tested and found to comply with the limits  
for a Class B digital device, pursuant to part 15 of the FCC Rules. These  
limits are designed to provide reasonable protection against harmful  
interference in a residential installation. This equipment generates, uses nd  
can radiate radio frequency energy and, if not installed and used in  
accordance with the instructions, may cause harmful interference to radio  
communications. However, there is no guarantee that interference will not  
occur in a particular installation. If this equipment does cause harmful  
interference to radio or television reception, which can be determined by  
turning the equipment off and on, the user is encouraged to try to correct  
the interference by one or more of the following measures:  
Reorient or relocate the receiving antenna.  
Increase the separation between the equipment and receiver.  
Connect the equipment into an outlet on a circuit different from that to  
which the receiver is connected.  
Consult the dealer or an experienced radio/TV technician for help.  
Notices  
ACR Electronics diligently works to provide a high quality Product Support  
Manual, however, despite best efforts, information is subject to change  
without notice, and omissions and inaccuracies are possible. ACR cannot  
accept liability for manual contents. To ensure that you have the most  
recent version of the Product Support Manual, please visit the ACR website  
©2008 by ACR Electronics, Inc., part of Cobham plc. All rights reserved.  
Reproduction in whole or in part is permitted only with permission of ACR  
Electronics, Inc. Ongoing product improvements may change product  
specifications without notice.  
Trademarks or registered trademarks are the property of their respective  
owners.  
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EC DECLARATION OF CONFORMITY  
ACR Electronics, Inc. hereby declares that the following product is in conformity with Directive  
1999/5/EC of the European Parliament and of the Council of 9 March 1999 on Radio  
Equipment and Telecommunications Terminal Equipment (R&TTE). In accordance with the  
Directive, the product will be marked with the CE conformity marking as follows:  
Product:  
Man Overboard Alarm Receiver  
Model: ARX-50  
Regulations and  
Standards:  
IEC 60945: 2002  
BS EN 50371: 2002  
Manufacturer:  
ACR Electronics, Inc.  
5757 Ravenswood Road  
Fort Lauderdale, FL 33312 USA  
European  
ACR Electronics, Inc.  
Representative:  
(European Office)  
1 Rose Cottages, Pitmore Lane,  
Sway, Lymington, Hampshire  
SO41 6BX, United Kingdom  
Signed on behalf of ACR Electronics Inc.  
Signed: _______________________________________  
Name: Kerry Greer  
Title: VP Engineering  
Date:  
January 9, 2009  
Document ARX-50-001  
This Declaration complies with ISO/IEC 17050-1:2004  
ACR Electronics, Inc. is registered by UL to ISO 9001:2000  
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