What Does 1K to 12Volt Pullup Mean in a Motion Sensor Diagram?

[only]

There is a pdf,there is a figure at the bottom of page 2, i just want to know what 's "1K to 12Volt pullup",Anybody help...

http://www.soundtube.com/Data/install_instructions/Fp_motion_Sensor.pdf

 

[only]

means pull up resistor?

 

[dlgoff]

Yes, it means a pull up resistor. It's connected to the unused wire to keep it at a high state.