Hanna Instruments HI 504902 User Manual

TECHNICAL DATA

• Telecom certifications Argentina, Australia, Austria, Belgium, Brazil, Canada, Chile,

China, Cyprus, Czech Republic, Denmark, Finland, France,
Germany, Greece, Hong Kong, Hungary, Iceland, India,
Indonesia, Ireland, Israel, Italy, Japan, Korea, Liechtenstein,
Luxembourg, Malaysia, Mexico, Netherlands, New Zeland,
Norway, Philippines, Poland, Portugal, Russia, Singapore,
Slovak Republic, South Africa, Spain, Sweden, Switzerland,
Taiwan, Turkey, United Kingdom, United States

• Data service

• Remote control by AT commands

• Input voltage 12 VDC

• Dimensions 165 x 110 x 35 mm (6.5 x 4.3 x 1.4'')

• Weight approx. 250 g (0.55 lb.)

MAINTENANCE & SAFETY TIPS

• Do not expose the unit to any extreme environment where temperature or humidity is high.

• Place the device in such a way that cables can not be damaged.

• THE HI50902 MODEM MUST BE CONNECTED TO A STANDARD ANALOG TELE-

PHONE LINE. NEVER CONNECT IT TO ANY DIGITAL TELEPHONE SYSTEM, SUCH
AS ISDN OR ADSL. THIS MAY CAUSE DAMAGE AND CAN BE DANGEROUS.

WARRANTY

This product is warranted for two years against defects in workmanship and materials when used for their
intended purpose and maintained according to instructions. This warranty is limited to repair or replacement free of
charge. Damages due to accidents, misuse, tampering or lack of prescribed maintenance are not covered. If service
is required, contact the dealer from whom you purchased the instrument. If under warranty, report the model
number, date of purchase, serial number and the nature of the failure. If the repair is not covered by the warranty,
you will be notified of the charges incurred. If the instrument is to be returned to Hanna Instruments, first obtain a
Returned Goods Authorization number from the Customer Service department and then send it with shipping costs
prepaid. When shipping any instrument, make sure it is properly packaged for complete protection.

IST504902 07/04

Instruction Manual

HI 504902

RS485 Modem

www.hannainst.com

Dear Customer,
Thank you for choosing a Hanna Instruments product. This manual will provide you with
the necessary information for correct operation. Please read it carefully before using the
instrument. If you need additional technical information, do not hesitate to e-mail us at
[e-mail]. This instrument is in compliance with the directives.

PRELIMINARY EXAMINATION

Remove the instrument from the packing material and examine it carefully to make sure that no
damage has occurred during shipping. If there is any damage, notify your Dealer.

Note: Save all packing material until you are sure that the instrument functions correctly.

All defective items must be returned in their original packaging together with the
supplied accessories.

OPERATIONAL GUIDE

• Connect the RS485 interface cable to A and B terminals.

• Connect Tip and Ring signals of the telephone line (pins 3 and 4 of RJ11 jack, i.e. the

2 central wires of the telephone cable) to the "PHONE" terminal of the unit (see
drawing); then plug the cable to the telephone line. The modem module is Tip/Ring
polarity insensitive.

• Connect the supplied power adapter wires to the proper terminals (black & white wire
to the negative pin "-"; black wire to the positive pin "+") and protect the device from
electrostatic discharges by grounding the unit through the PE terminal.

• Power the unit through the 12 VDC adapter. The "ON" LED lights up.

• The unit is also provided with two LED indicators for signaling the operating status: a

blinking "RD" green LED is related to data receiving, while the "TD" yellow LED flashes
during data transmission.

FUNCTIONAL DESCRIPTION

Inside view

Note: The modem should be installed only by qualified personnel.