American Fibertek MRX-480 - Manual (Page 3)

3
INSTALLATION AND OPERATION INSTRUCTIONS
INTRODUCTION
Thank you for purchasing your American Fibertek MRX-480 multimode bi-directional multi-protocol data
receiver. Please take a few minutes to read these installation instructions in order to obtain the
maximum performance from this product.
FUNCTIONAL DESCRIPTION
The MRX-480 operates as half of a transmitter / receiver pair for the transmission of one bi-directional
data channel. This data channel can be configured for any one of the following protocols:
RS485 (2 or 4 wire) data, RS422 data, RS232 data, or Manchester / Bosch data.
NOTE: This unit is shipped with the data channel in the RS485 4-wire configuration. For other
configurations, please refer to the DATA CONFIGURATION section for changes to the default
switch settings.
The MRX-480 is designed to operate with the MTX-480 or RTX-480 transmitter with bi-directional data
over one multimode fiber optic cable.
The MRX-480 converts a single data signal into a high speed serial data stream. This serial data
stream modulates a laser at 1550 nm wavelength. The MRX-480 also detects a return optical serial
data stream signal containing one data channel at 1310 nm wavelength. The 480 Series product is
designed to operate over an optical loss budget range of 0 to 18 dB on 62.5 um multimode fiber. The
MTX-480 will also operate on 50 um multimode fiber at a reduced loss budget range. Refer to the
product specification sheet for additional performance data.
The RS485 channel may be configured for 2-wire (half duplex) or 4-wire (full duplex) with or without
biasing. Switch selectable internal 120 ohm terminations are available for RS422 or RS485 data.
This unit is contained in a rugged aluminum housing with internal dc voltage regulation. The detachable
terminal blocks and LED indicators provide for easy installation and monitoring of data and optical
power.
The MRX-480 is designed for mounting as a modular stand alone unit. For a rack mounted version
please see the RRX-480.
INSTALLATION
THIS INSTALLATION SHOULD BE MADE BY A QUALIFIED SERVICE PERSON AND SHOULD
CONFORM TO THE NATIONAL ELECTRICAL CODE, ANSI/NFPA 70 AND LOCAL CODES.
Mount the unit to a secure surface using #8 (3mm) hardware in four places. See the drawing on the
next page for mounting dimensions. Be sure to allow sufficient room for the required minimum bend
radius of the fiber cable used.
POWER SOURCE
THIS PRODUCT SHALL BE POWERED BY A LISTED CLASS 2 POWER SUPPLY ONLY.
This unit requires a +12VDC power source with a current rating of 500 milliamps for proper operation.
The DC input is diode protected. In the USA and in Canada an American Fibertek PS-12 is supplied
with this unit. The negative side of the power input is directly connected to ground. ANSI/NFPA 70
Class 2 wiring is recommended.