140CRA21110 Modicon Power Supply Module, DIO I/O Drop Modbus Plus

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The information provided in this documentation contains general descriptions and/or technical characteristics of the performance of the products contained herein. This documentation is not intended as a substitute for and is not to be used for determining suitability or reliability of these products for specific user applications. It is the duty of any such user or integrator to perform the appropriate and complete risk analysis, evaluation and testing of the products with respect to the relevant specific application or use thereof. Neither Schneider Electric nor any of its affiliates or subsidiaries shall be responsible or liable for misuse of the information contained herein. If you have any suggestions for improvements or amendments or have found errors in this publication, please notify us. No part of this document may be reproduced in any form or by any means, electronic or mechanical, including photocopying, without express written permission of Schneider Electric.

All pertinent state, regional, and local safety regulations must be observed when installing and using this product. For reasons of safety and to help ensure compliance with documented system data, only the manufacturer should perform repairs to components.

When devices are used for applications with technical safety requirements, the relevant instructions must be followed.

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NOTICE

Read these instructions carefully, and look at the equipment to become familiar with the device before trying to install, operate, or maintain it. The following special messages may appear throughout this documentation or on the equipment to warn of potential hazards or to call attention to information that clarifies or simplifies a procedure.

Overview

This chapter will give you general information to understand where and when you can use the 140 NRP 954 0• fiber optic repeater modules. The 140 NRP 954 0• fiber optic repeater modules can be inserted in a RIO network. There are 2 models of fiber optic repeaters each supporting one type of fiber optic cables:  140 NRP 954 00 supports multimode optical fiber cable.  140 NRP 954 01C supports single-mode optical fiber cable.

RIO Networks

Modicon Quantum RIO network is a high speed (1.544 Mbit/s) local area network (LAN) using coaxial cables. The RIO network supports communication between a PLC and one or more drops of I/O modules dispersed throughout the local area, e.g., the manufacturing or processing facility. There are many possible native topologies that may be used for RIO networks:  Linear cable topologies (see the Remote I/O Cable System Planning and Installation Guide for information about RIO coaxial cable networks.):  Standard single-cable RIO cable systems  Redundant RIO cable systems  Dual cable systems  Hot Standby cable topologies (see the Modicon Quantum Hot standby System User Manual for information about Hot Standby coaxial cable networks.):  Single-cable Hot Standby system  Redundant Hot Standby cable system The fundamental architecture of a RIO cable system is as follows:  the RIO processor is called the head  the network is made of one (linear) or two (dual or redundant) trunk cable(s) Taps are installed along the length of the trunk cable(s), and a drop cable runs from a tap to a drop adapter. A proper impedance match is maintained across the network with 75 Ω trunk terminators.

The following figure shows the basis of a standard single-cable RIO system:

The part number table (see page 22) gives references for the basic components that may be used in a RIO topology.

140 NRP 954 0• Fiber Optic Repeaters Insertion
The insertion of fiber optic cables in a RIO network allows to:
l extend the total length of the RIO network, e.g., RIO drops in distant separate
blocks of a factory without exceeding the attenuation limit of the coaxial cable   system.
l significantly improve the noise immunity characteristics of the installation.
l create topologies that couldn’t work properly with one coaxial cable.
l resolve distant grounding issues, e.g., when using different ground references is  mandatory, e.g., between two buildings.
In addition to the general application listed above:
l The insertion of 140 NRP 954 00 fiber optic repeaters in an existing RIO network that already use 490NRP954 fiber optic repeaters allows to expand the RIO network without additional pulse width distortion (or jitter).
The 490NRP954 fiber optic repeater is a multimode fiber optic repeater. Refer to the Modicon Fiber Optic Repeater’s User Guide for details on the 490NRP954.

Insertion of Fiber Optic Repeaters in a Drop Cable The following figure shows a RIO network with the second RIO drop connected to the trunk cable using a long drop cable:

To avoid attenuation, noise and/or distant ground in case of a long drop cable, it can be useful to install fiber optic repeaters.

Application Example

The following example will show you the architecture of a highly diagnosed rack inserted in a redundant bus topology and power supplies (AC and DC). This architecture allows to warn and interpret remotely which availability has been lost (power supply, fiber optic cable...):

1 Trunk cable
2 Drop cable
3 Tap with trunk terminator
4 2 pairs of fiber optic cables
P/S 140 CPS 124 00 and 140 CPS 224 00 Redundant power supply modules
NRP 140 NRP 954 0• Fiber optic repeater module
CRA 140 CRA 932 00 Remote I/O drop dual channel module
DDI 140 DDI 353 00 DC input 24 Vdc module
The 140 NRP 954 0• fiber optic repeaters are chained together to extend the lengthof the redundant fiber link (for example in a tunnel). The diagnostic relays of the
redundant power supplies (AC and DC) and NRP modules are connected to the DDI module. All diagnostic relay status available in the DDI module are transmitted on the RIO network via the CRA module.
NOTE: In this example the modules are installed in a 6-slot Quantum backplane (140 XBP 006 00) or more.
Please refer to the Modicon Quantum Automation Series Hardware Reference
Guide for details on power supply, remote I/O drop, DC input modules and backplane.