American Fibertek RR-81 - Manual (Page 3)

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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.