American Fibertek MRM-1485-2F8 User Manual

With Bi-directional RS485 Data

Instruction Manual

MRM-1485-2F8 Video Receiver

Table of Contents

Functional Description ........................................................................3

Installation...........................................................................................3

Power Source .....................................................................................3

Power Connection...............................................................................3

Fiber Input / Output Connections........................................................4

Video Output Connection....................................................................4

Data Input / Output Connections.........................................................4

Data Configuration..............................................................................4

Switch/Jumper Settings.......................................................................5

MRM-1485-2F8 Status LED Indicators...............................................6

RS-485 Termination and Offset Bias Requirements...........................7

Warranty and Service Information ......................................................8

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.

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