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Cooper Bussmann BU-905U-L Wireless I/O Installation Manual
The unit provides contact wetting current of approximately 5mA to maintain reliable operation of driving relays.
Each digital input is connected between the appropriate Digital Input terminal and Ground.
Each digital input circuit includes a LED indicator that lights when the digital input is active (i.e., when the input circuit is closed).
To activate the digital input, the switching device resistance must be less than 200 ohms.
Connection Method
Example
Voltage free contact
Active 0-5v signal device
3A1580Rev1.6