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Weight Controller or Lafet node

Switches & led’s :

At the front you’ll find four leds :

  • Top a yellow led : SERVICE-led. Lights up when you push the service-switch. When this led flashes or is lit continuously, a severe software problem occurred in the node. ( call us )
  • Second a red led : RECEIVE-led
  • Third a red led : TRANSMIT-led
  • A push-button switch : SERVICE-switch. This transmits the ID-number of the node.

There is a 6-way connector for the network

pin 1+12V (input)
pin 2GND
pin 3NC
pin 4Network A
pin 5Earth ( shielding )
pin 6Network B

The 4-way connector used for the alarm and blocking of the card reader while outputs are being sent.

pin 1+12V output for alarm
pin 2GND for alarm
pin 3potential free contact, closed when sending outputs
pin 4potential free contact, closed when sending outputs

The 36-way connector for the weight sensors and door switches.

pin 1 ,2 ,3 ,4 ,5+ excitation of weight sensor 1 thru 5 brown
pin 10,11,12,13,14+ output of weight sensor 1 thru 5 white
pin 19,20,21,22,23- output of weight sensor 1 thru 5 green
pin 28,29,30,31,32- excitation of weight sensor 1 thru 5 yellow
pin 8switch door 1
pin 17switch door 2
pin 26switch door 3
pin 35switch door 4
pin 9switch door 5
pin 36common for door switches

When there are less than 5 weight sensors connected, you’ll need to connect + output with – output of the not used inputs. ( eg. When you use only 4 sensors you’ll connect pin 14 and pin 23 with each other.

To prevent ESD, connect pin 33 with the housing of the weight sensors. The shielding of the cable is not connected with the housing !


Calibrate the weight controller:

  • Make sure there is place in the refrigerator to store 20 bottles and that this refrigerator is closed.
  • Insert a calibration card in the reader.
  • Place 20 bottles in the refrigerator and close the door.
  • Wait 2 seconds.
  • Remove the calibration card from the reader.
  • The weight controller is now calibrated.

Flags :

  • Flags :
    • 0= normal
    • x = continuous read, with x is the hysteresis (1-8)
    • add 100 by the flags and the door relay will work inverse (Normally closed), Supported in version 1.6 or higher.
  • Wait : door close wait time (10-20)
  • TimeOut: wait time for alarm with pneumatic door action(40)
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Page last modified on November 17, 2009, at 10:32 AM