American Fibertek MT-81 User Manual

Contact Closure Transmitter

Instruction Manual

Eight Channel

MT-81

INSTALLATION AND OPERATION INSTRUCTIONS

INTRODUCTION

Thank you for purchasing your American Fibertek MT-81 singlemode contact closure transmitter. Please take a few minutes to read these installation instructions in order to obtain the maximum performance from this product.

FUNCTIONAL DESCRIPTION

The MT-81 operates as half of a transmitter/receiver pair for the transmission of eight dry latching contact closure signals. It is designed to operate with the MR-81 or RR-81 contact closure receiver over one multimode fiber optic cable. The 81 series receiver has a user selectable switch that allows the contact status sent by the MT-81 to be maintained unchanged through loss of optical or electrical power at the receiver. Both the transmitter and receiver include a recessed button to clear all contacts to a default state.

The MT-81 converts eight contact closure inputs into an optical output using a 1310 nm wavelength source. The 81 Series product is designed to operate over an optical loss budget range of 0 to 12 dB. The MT-81 operates on 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 blocks and LED indicators provide for easy installation and monitoring of contact closure and power.

The MT-81 is designed for mounting as a modular stand alone unit. For a rack mounted version please see the RT-81.

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 12 volt DC power source for proper operation. In the USA and in Canada an American Fibertek PS-12D is supplied with this unit. ANSI/NFPA 70 Class 2 wiring is recommended.

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