American Fibertek RR-81 - Manual (Page 2)

2
INSTALLATION AND OPERATION INSTRUCTIONS
INTRODUCTION
Thank you for purchasing your American Fibertek RR-81 multimode 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 RR-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 MT-81 or RT-81 contact closure transmitter
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 or RT-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 RR-81 converts an optical input into eight contact closure outputs using a 1310 nm wavelength
detector. The 81 Series product is designed to operate over an optical loss budget range of 0 to 12 dB
on 62.5 um fiber. The RT-81 operates on 50 um or 62.5 um multimode fiber. Refer to the data sheets
for detailed performance specifications.
This unit is designed for rack mounting in either of two American Fibertek subracks available. The
subrack model numbers are SR-20/2 or SR-20D/2. Slide in rack mounting, detachable terminal blocks,
and LED indicators provide for easy installation and monitoring of data and optical power.
The RR-81 is designed for mounting as a rack mounted unit. For a modular stand alone version please
see the MR-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.
The unit slides into any open slot in the SR-20 or SR-20D subrack. Use a small screwdriver to push
and lock the two ¼ turn fasteners into place.
POWER SOURCE
Power to the unit is supplied by the subrack. Please refer to the SR-20/SR-20D and PSR-2 instructions
for further details.
POWER CONNECTION
Power is supplied to the unit via a four finger backplane connector. The RT-81 can be inserted into the
subrack or removed from the subrack with power applied to the backplane.