T9402 industrial control spare parts PLC module DCS system module

T9402 industrial control spare parts PLC module DCS system module

Technical data of product parameters

Serial networks are closed and local and have limited protocol functionality, so T9402
they are immune to any external attack apart from local deliberate sabotage.
The AADvance system, however, with its computers and DCS interfaces, uses
Ethernet networks which are frequently part of a larger corporate network and
can expose the system to accidental or malicious infection or attackIt is possible during sustained periods of abnormal input voltage slewing that
channels can be declared faulted as a consequence of diagnostics otherwise
designed to verify that the channels are operating within their designed safety T9402
accuracy.
To avoid spurious declaration of channel faults it is necessary to ensure that
the input signal condition satisfies the maximum slew rate criteria defined in
the Solutions Handbook. Accordingly it may be necessary to condition the
input signal such as by filtering or by appropriate choice of process safety time.The F&G circuit will also allow two devices to be in alarm without
reporting short circuit.
• All of the input circuits are suitable for simplex, dual and TMR
configurations.
• The F&G circuit assumes that the devices are volt-free contacts.
• For further information, please refer to application note AN-T90001 Field
Loop Configuration, which is located in the Rockwell Automation
Knowledgebase Support Center. This also includes advice for fire
detectors which are not simple volt free contactIt is possible during sustained periods of abnormal input current slewing that T9402
channels can be declared faulted as a consequence of diagnostics otherwise
designed to verify that the channels are operating within their designed safety
accuracy.
To avoid spurious declaration of channel faults it is necessary to ensure that
the input signal condition satisfies the maximum slew rate criteria defined in
the Solutions Handbook. Accordingly it may be necessary to condition the
input signal such as by filtering, sensor slew rate configuration or by
appropriate choice of process safety time.

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Introduction to main products

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