Where are these DI and AI points from MCC connected to in the DCS?
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For example, for a motor, the AI signals coming from the MCC contain current data, while the DI signals contain operation status signals and fault signals. Where are these 3 points connected on the MCC side?
The current is generally output by the motor controller; it can also be output through a transmitter connected to a current transformer. As for operation signals and fault locations, if there is a motor controller, these are usually provided by it. Nowadays, motor controllers are also intelligent and can be configured
You already said you came from MCC, so of course it’s on MCC~~:)
If a current transmitter is used, should it be installed in the MCC or on the DCS side?
MCC side. In the MCC, it is either a motor protector or a thermal relay; in any case, it’s on the MCC side.
If a current transmitter is used, it is used to transform the current transformer, and it is installed on the MCC cabinet
This post was last edited by zxb1990 on 2016-9-19 20:15. If the motor is equipped with an inverter, the current signal can also be sent from the inverter to the DCS.
The MCC current transmitter has outputted