Installation guide

RIO Network Hardware Components
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890 USE 101 00 October 2006
Hardware Overview
Overview This section provides detailed information about the requirements and availability of
hardware components for the RIO cable system (see the table on the following
page). Many of the components are available directly from Modicon; qualified
alternative sources are also given.
Required Coaxial
Cable System
Hardware
Components
All RIO cable systems require the following hardware components:
z Taps to isolate the individual drop adapters from the rest of the network
z F connectors for making drop cable connections at the taps
z F or BNC connectors for making drop cable connections at the adapter
z Terminators to assure a properly balanced network and to keep unwanted signals
out of the cable system
A splitter is required in a Hot Standby system to connect the primary and standby
PLCs to the trunk cable, and may be used under certain conditions in other RIO
cable topologies (see Planning and Designing an RIO Cable System, p. 19).
Optional Coaxial
Cable System
Hardware
Components
Depending on the types of cable used in the system and on overall demands that
will be placed on the network by the application, some of the following hardware
options may be used in your RIO cable system:
z Adapters for converting from F to BNC connectors for making high performance
semirigid trunk cable connections compatible with standard system hardware
z Self-terminating F adapters or in-line BNC terminators for automatic termination
in drop cables should they be disconnected from the drop adapter
Optional RIO
Fiber Optics
Repeater
The 490NRP954 RIO Fiber Optics Repeater provides an alternative fiber-medium
communication link between two or more RIO nodes or network segments. Each
repeater contains one electrical RIO interface (an F-connector) and two fiber optic
transceivers. The RIO interface has the same specifications and restrictions as a
head RIO processor with a pre-amp—e.g., 35 dB dynamic range—and must be
treated accordingly.
The repeater is passive—i.e., there is no regeneration of the received signal in the
repeater and no additional delay to the signal produced by the repeater.
This document provided by Barr-Thorp Electric Co., Inc. 800-473-9123 www.barr-thorp.com