Momentum Modbus Plus 170 PNT Series Dokumentacja Pobierz pdf (Strona 8)

4/5Schneider Electric

An MA-0185-100 tap is required for every drop on the system to electrically isolate

the drop from the trunk and protect the system from impedance mismatches and

cable disconnections. A minimum signal strength of 14dB is required between the

trunk and each drop to ensure correct operation. The signal loss on the trunk cable

as it crosses the tap is less than 1dB. A total of 35 dB is available from the head-end

RIO processor. The entire cabling architecture must not exceed this system limit.

For systems that require high availability, a redundant-cable option is available to

protect the system from cable breaks and damaged connectors. With two cables

connected between the host and each drop, a single cable break does not disrupt

communications. If a cable break occurs, a health bit is set to indicate the problem

node and faulty cable. For preventative maintenance, the system also provides retry

counters for all communication transactions to all nodes. High retry counts on a cable

in a specific node could indicate connection problems that can be scheduled and

corrected prior to unwanted downtime.

RIO cable topologies

A single-cable RIO topology

Quantum CPU with 140 CRP 931 00 adapter

RIO drop 1, with a

140 CRA 931 00

adapter

Unconfigured

expansion drop

location

52-0401-000 F

connector

MA-0185-100

tap

MA-0185-100 tap

with 52-0402-000

port terminator

MA-0185-100

tap

MA-0185-100 tap with

52-0422-000 trunk

terminator

97-5951-000 RG-11

trunk cable

97-5750-000 RG-6

drop cables

RIO drop 2, with a

140 CRA 931 00

adapter

Last RIO drop, with a

140 CRA 931 00

adapter

Local I/O

A redundant-cable RIO topology

Last RIO drop, with a

140 CRA 932 00

adapter

Quantum CPU with 140 CRP 932 00 adapter

Two trunk cables

Two F connectors

RIO drop 1, with a

140 CRA 932 00

adapter

RIO drop 2, with a

140 CRA 932 00

adapter

Two drop cables

per drop

Both sets of taps correctly terminatedTwo taps per drop

Local I/O

Quantum automation platform 4

I/O architectures

Remote I/O

Topologies

1 2 3 4 5 6 7 8 9 10 11 12 13 ... 75 76

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