American Fibertek MRM-1485-2F8 - Manual (Page 3)

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INSTALLATION AND OPERATION INSTRUCTIONS
INTRODUCTION
Thank you for purchasing your American Fibertek MRM-1485-2F8 multimode mini video
receiver with RS485 transceiver. Please take a few minutes to read these installation
instructions in order to obtain the maximum performance from this product.
FUNCTIONAL DESCRIPTION
The MRM-1485-2F8 operates as half of a transmitter / receiver pair for the transmission of
baseband NTSC, PAL, RS170, or RS343 video signals and bi-directional RS485 data. It is
designed to operate with the MTM-1485-2F8 or RTM-1485-2F8 video transmitter with RS485
transceiver over two multimode fibers.
The MRM-1485-2F8 converts a FM modulated optical fiber input into a single video output and a
single RS485 output using an 850 nm wavelength detector. The MRM-1485-2F8 also converts
an electrical RS485 input signal into an optical RS485 output returning on a separate fiber using
an 850 nm wavelength source. This unit may be configured for two wire half duplex or four wire
full duplex electrical interfaces. The M1485-2F8 Series product is designed to operate over an
optical loss budget range of 0 to 12 dB. The MRM-1485-2F8 operates on 50 um or 62.5 um
multimode fiber. Refer to the data sheets for detailed performance specifications.
This unit is contained in a compact and rugged aluminum housing with internal dc voltage
regulation. The detachable terminal block and LED indicators provide for easy installation and
monitoring of video, data, and dc power.
The MRM-1485-2F8 is designed for mounting as a modular stand alone unit. For a rack
mounted version please see the RRM-1485-2F8.
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.
The unit requires a +12VDC power source 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.
POWER CONNECTION
Power is supplied to the unit via a two pin terminal connector. Follow the label on unit for proper
orientation of +12 volt dc and ground.