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Electronic Theatre Controls Inc

ERP Mains Fed EchoConnect Positive and Negative Polarity

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Mains Fed ERP had an unlabeled Station Bus terminal block in panels shipped prior to June 2021. EchoConnect is polarity dependent, so it is important to properly connect your stations.

If your ERP is top fed- your connector will start with positive beginning on the left side of the connector.  Refer to the picture below:

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If your ERP is bottom fed- your connector will start with negative beginning on the left side of the connector, essentially flipping the order.

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