American Fibertek RR-81 User Manual

© Copyright 2008, American Fibertek, Inc. 0711JD

Contact Closure Receiver

Instruction Manual

RR-81

Eight Channel

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.

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FIBER OUTPUT CONNECTION

The fiber optic connection is made via a ST connector located on the back of the unit. Be sure to allow
sufficient room for the required minimum bend radius of the fiber cable used.

FIBER OUTPUT CONNECTION

The optical output connection is made via a ST connector located on the back of the unit.

CONTACT CLOSURE INPUT CONNECTIONS

Contact closure output connections are made via terminal blocks attached to the right side of the unit.
Please note that the three Channel 1 output connections begin at the second terminal screw closest to
the fiber connection on each of the three nine pin terminal strips. Channels 2 through 8 connections
continue down the terminal strip. Each channel has one common output connection that can be used
with a normally closed connection or a normally open connection. For optimum performance the copper
cables carrying the contact closure signal should be the shortest length of wire practical.

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RESET PUSH BUTTON

A recessed momentary contact push button is located on the front of the card near the LED indicators.
Pushing this button causes the RR-81 outputs to be reset to their default states.

RR-81 STATUS INDICATORS

The RR-81 provides the following LED status indicators to aid in installation and troubleshooting:

CC1 THROUGH CC8

A green LED indicator is provided for each of the contact closure inputs to the RT-81. Contact closure
status associated with these LED’s is summarized below.

Contact Closure LED Contact Closure Input Status

Green Contact Input Terminals Closed (Shorted)

Off Contact Input Terminals Open

OLI/DC PWR

A bicolor LED indicator monitors the power of the optical signal that is being received at the RR-81
from the MT-81 or RT-81. DC power and optical input status associated with this LED are summarized
below.

Optical Level Indicator DC Power Status Optical Status

Green On Proper Optical Input Power Present

Red On Optical Input Not Detected

Off Off Check Power Supply

LIFETIME WARRANTY INFORMATION

American Fibertek, Inc warrants that at the time of delivery the products delivered will be free of defects
in materials and workmanship. Defective products will be repaired or replaced at the exclusive option of
American Fibertek. A Return Material Authorization (RMA) number is required to send the products
back in case of return. All returns must be shipped prepaid. This warranty is void if the products have
been tampered with. This warranty shall be construed in accordance with New Jersey law and the
courts of New Jersey shall have exclusive jurisdiction over this contract. EXCEPT FOR THE

FOREGOING WARRANTY, THERE IS NO WARRANTY OF MERCHANTABILITY OR FITNESS FOR
A PARTICULAR PURPOSE OR OTHERWISE, EXPRESSED OR IMPLIED, WHICH EXTENDS
BEYOND THE WARRANTY SET FORTH IN THIS AGREEMENT. In any event, American Fibertek will

not be responsible or liable for contingent, consequential, or incidental damages. No agreement or
understanding, expressed or implied, except as set forth in this warranty, will be binding upon American
Fibertek unless in writing, signed by a duly authorized officer of American Fibertek.

SERVICE INFORMATION

There are no user serviceable parts inside the unit.
In the event that service is required to this unit, please direct all inquiries to:

American Fibertek, Inc. Phone: [phone]
120 Belmont Drive Phone: [phone]
Somerset, NJ 08873 FAX [phone]

E-mail: [e-mail]

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