American Fibertek MRM-3485-4-12VDC User Manual

© Copyright 2007, American Fibertek, Inc. 0530JD

Bi-directional 4-Wire RS485

Instruction Manual

MRM-3485-4-12VDC
Video Receiver With

INSTALLATION AND OPERATION INSTRUCTIONS

INTRODUCTION

Thank you for purchasing your American Fibertek MRM-3485-4-12VDC singlemode video receiver with bi­directional 4-Wire RS4485 data. Please take a few minutes to read these installation instructions in order to
obtain the maximum performance from this product.

FUNCTIONAL DESCRIPTION

The MRM-3485-4-12VDC operates as half of a transmitter / receiver pair for the transmission of a baseband
NTSC, PAL, RS170, or RS343 video signal with bi-directional 4-wire RS485 data. It is designed to operate with
the MTM-3485-4-12VDC or RTM-3485-4 video transmitter over one singlemode fiber optic cable.

The MRM-3485-4-12VDC converts a 4-wire RS485 data input into an optical output using a 1550 nm
wavelength source. The MRM-3485-4-12VDC also converts an optical input signal returning on the same fiber
into a single video output and a 4-wire RS485 data output using a 1310 nm wavelength detector. The M3485-4
Series product is designed to operate over an optical loss budget range of 0 to 10 dB. The MRM-3485-4-12VDC
operates on 9 um singlemode fiber. Refer to the data sheets for detailed specifications.

This unit is contained in a compact and rugged aluminum housing with internal dc voltage regulation. The
detachable terminal blocks and LED indicator provide for easy installation and monitoring of video, data, and dc
power.

The MRM-3485-4-12VDC is designed for mounting as a modular stand alone unit. For a rack mounted version
please see the RRM-3485-4.

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 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 an isolated 12 volt DC power source for proper operation. ANSI/NFPA 70 Class 2 wiring is
recommended.

POWER CONNECTION

Power is supplied to the unit via a two pin terminal connector on the side of the unit. See label on unit for proper
orientation of input power.

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