nvent RAYCHEM ACS-30, Руководство по программированию

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Raychem-AR-H58692-ACS30UIT2Programming-EN-1805
Fig. 2.14
Circuits Copied message
2.2.3. ASSIGNING AND SHARING RTD CONTROL AND MONITORING
By default, each channel of the ACS-PCM2-5 or C910-485 has an associated RTD input. On any
ACS-CRM board, the first RTD input is automatically coupled with the first relay output; the second
RTD is linked with the second output relay, etc.
The Setup|RTDs window displays the default RTD assignment in the A field. This selection is grayed
out because you cannot alter this default selection.
Fig. 2.15 Setup|RTDs window with Line Control
If no RTD is connected to the input terminals for this circuit, then all four lines can be used to assign
RTDs from elsewhere in the system. However, in the event of a communications or UIT failure, no
RTD input is available and the relay output for this circuit goes to the failsafe mode established in
the Setup|Circuit window.
Up to three additional RTDs can be associated with a given circuit. When the system is operating,
the lowest temperature value from the array of multiple RTDs will be used as the control
temperature.
If no RTD is connected to the input terminals of a given relay, then all four RTD inputs can be used
to assign RTDs from elsewhere in the system. However, in the event of a communications or UIT
failure, no RTD input will be available and the relay output for this circuit will go into its failsafe mode
established in the Setup|Circuit window.