Description
The Honeywell TK-PRR021 is a redundancy module that is used in a variety of industrial applications. It is designed to provide a high level of reliability and availability for critical control systems.
The TK-PRR021 has two input channels and one output channel. Each input channel can be connected to a separate control system. The output channel is connected to the controlled device. The TK-PRR021 continuously compares the signals from the two input channels. If the signals differ by more than a preset amount, the TK-PRR021 will switch the output channel to the other input channel. This ensures that the controlled device continues to operate even if one of the control systems fails.
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