American Fibertek MR-81SL - Manual (Page 2)

2
INSTALLATION AND OPERATION INSTRUCTIONS
INTRODUCTION
Thank you for purchasing your American Fibertek MR-81SL singlemode contact closure receiver.
Please take a few minutes to read these installation instructions in order to obtain the maximum
performance from this product.
FUNCTIONAL DESCRIPTION
The MR-81SL 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 MT-81SL or RT-81SL contact closure
transmitter over one singlemode fiber optic cable. The MR-81SL has a user selectable switch that
allows the contact status sent by the MT-81SL or RT-81SL 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 MR-81SL converts an optical input into eight contact closure outputs using a 1310 nm wavelength
detector. The 81SL Series product is designed to operate over an optical loss budget range of 0 to 19
dB. The MR-81SL operates on 9 um singlemode 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 MR-81SL is designed for mounting as a modular stand alone unit. For a rack mounted version
please see the RR-81SL.
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.