Instruction Manual

ManualsBrandsSchneider ManualsModicon QuantumSCHNEIDER 140CRA93100 RIO Drop Adaptor Module Modicon Quantum

RIO General recommendations

RIO is fundamentally a single-master network, and the RIO processor (140CRP93x00) is the master node. The RIO

processor is located at the PLC side, at the head-end of the RIO network. All other nodes on the network communicate

with the RIO head via RIO adapters (140CRA93x00) located at the drops side. A Quantum RIO network can contain up to

31 drops. Each RIO Adapter on the network must be assigned a unique address number, which is set by rotary switches

on the rear panel of the RIO adapter.

RIO legal topologies basis

RIO network topologies are precisely defined (single cable system, dual cable system, redundant cable system) and

cannot be derogated from. Illegal topology may result into RIO Network dysfunction.

Trunk cable starts at the RIO processor and runs the

entire length of the network as one or two (dual or

redundant) trunk cable(s).

RG-11 cable (97-5951-000) is highly recommended

for use as trunk cable.

Taps (MA-0185-100) are installed along the length

of the trunk cable(s), and a drop cable is run from a

tap to a drop adapter. The taps also isolate each

drop adapter from all other drop adapters on the

network so that they will not interfere with each

other.

Note: When using previous version MA-0185-000 as

a tap do not use a version earlier than Rev C.

Extending from a tap to an adapter is a drop cable.

RG-6 cable (97-5750-000) is recommended for use

as the drop cable.

Splitters (MA-0331-000) are used to create a branch

in the network cable trunk. They provide isolation

between the branches and allow the cable to be laid

out in two directions.

Only one trunk splitter MA-0331-000 is allowed in a

network.

View of a generic RIO network

Splitter topology within single cable system

Focus on specific Hot Standby RIO topology

When using Hot Standby (HSBY), RIO network

topologies are precisely defined (HSBY single cable

system, HSBY redundant cable system) and cannot

be derogated from. Illegal topology may result into

RIO Network dysfunction.

HSBY system is based on two identically configured

PLC’s, therefore a specific splitter (MA-0186-100)

connects the two RIO heads.

Only one trunk splitter MA-0186-100 is allowed in a

network.

Note: When using previous version MA-0186-000 as

a splitter do not use a version earlier than Rev B.

Dual-cable Hot Standby system topology

Summary of content (6 pages)

PAGE 1
RIO General recommendations RIO is fundamentally a single-master network, and the RIO processor (140CRP93x00) is the master node. The RIO processor is located at the PLC side, at the head-end of the RIO network. All other nodes on the network communicate with the RIO head via RIO adapters (140CRA93x00) located at the drops side. A Quantum RIO network can contain up to 31 drops.
PAGE 2
CAUTION UNEXPECTED BEHAVIOR OF APPLICATION Don’t use more than one splitter as a branching device on the RIO networks. This restriction applies to both MA-0331-000 and MA-0186-100. Failure to follow these instructions can result in equipment damage. Cabling recommendations to avoid communication signal disturbances Lengths recommendations: • The minimum length for a RG6 drop cable is 2.5m (8.53 ft) – shorter drop cable generates unacceptable signal reflections from the tap.
PAGE 3
This will assure safety for maintenance personnel and RIO users. Choose a low impedance earth ground for your cable system, preferably factory ground. • • A poor earthing and bonding condition affects electronics equipment (e.g. PLC’s, I/O modules, communication interfaces, etc.) and by the way the quality of communication links (RIO, Modbus, Ethernet, etc.). For earthing, avoid long wires, loose contacts, contacts done on painted surfaces, that don’t insure a good electrical contact.
PAGE 4
Designing a Coaxial Cable System to an Attenuation Limit Attenuation on RIO network appears a signal passes through taps, splitters, splices, cables, connections and feedthrough terminators. The attenuation between the head processor (or the last optical fiber repeater, if an optical link is used) and any drop adapter must not exceed 35 dB at 1.544 MHz. If the cable design exceeds the maximum attenuation limit, transmission error may occur on the network. Cable attenuation: 97-5750-000 RG6 cable has 1.
PAGE 5
RIO network system with optical fiber repeaters topology Earthing recommendations When using optical fiber repeater 490NRP95400, either to extend total RIO network length, or to improve RIO immunity to EMC disturbances, NRP chassis must be connected to Ground, through dedicated screw. RIO cable shield must be set to specify the NRP relationship to chassis ground.
PAGE 6
RIO network commissioning Commissioning the RIO network after initial installation, or any later modification, it is mandatory to perform the following: • Time-Domain Reflectometer (TDR) measurement allows ensuring proper installation of the RIO copper network, but also quality of each component (trunk cable, drop cable, tap, splitter, termination, connectors), by measuring attenuations & return loss (total should not exceed 35dB budget) and checking network adaptation (no reflection should appear).