American Fibertek MRM-1485 User Manual

Instruction Manual

MRM-1485

Video Receiver

With Bi-directional RS485 Data

Table of Contents

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

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

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

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

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

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

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

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

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

Warranty ........................................................................................... 8

Service Information ........................................................................... 8

INSTALLATION AND OPERATION INSTRUCTIONS

INTRODUCTION

Thank you for purchasing your American Fibertek MRM-1485 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 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 or RTM-1485 video transmitter with RS485 transceiver over a single multimode fiber optic cable.

The MRM-1485 converts a FM modulated optical fiber input into a single video output and a single RS485 output using a 1300 nm wavelength detector. The MRM-1485 also converts an electrical RS485 input signal into an optical RS485 output returning on the same 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 Series product is designed to operate over an optical loss budget range of 0 to 12 dB. The MRM-1485 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 is designed for mounting as a modular stand alone unit. For a rack mounted version please see the RRM-1485.

INSTALLATION

THE INSTALLATION OF THIS UNIT SHOULD BE MADE BY A QUALIFIED SERVICE PERSON(S) AND MUST CONFORM TO ALL 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 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 label on unit for proper orientation of +12 volt dc and ground.

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