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Use the BD20 to Drive LEDS

Optional LED indicator:
If you decide to use the optional LED indicator connect a DC power supply of between 5 and 12 Volts to terminal 1 (ground) and terminal 4 (+ voltage). When the detector
activates the onboard LED will light.


Optional relay driver output:
If you decide to use the optional relay (or external lamp, etc.) driver connect a DC power supply of between 5 and 12 Volts, as appropriate for the relay or other device, to terminal 1 (ground) and terminal 4 (+ voltage). The relay coil connects to terminals 3 and 4. The maximum current that can be controlled by the terminal 3 is 150mA.

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