CNC4PC C11G - Page 14

C11G (Rev. 8.2) User Manual
Revision: 01/27/2010 http://cnc4pc.com/TechDocs/C11GR8_2_User_Manual.pdf 14/21
Fig. 10 Wiring diagram to connect NPN proximity sensors with internal pull up resistor.
Some NPN proximity sensor has a pull-up resistor (R1) internally. It is necessary
to know its value in order to connect safely the sensor with the BOB. Follow this
recommendation:
Connecting NPN open collector proximity sensor with the C11G
(R1+R2) Value (12V)
(R1+R2) Value (24V)
Aprox. 10KΩ
Aprox. 25KΩ