Campbell Hausfeld SDM-CAN Manual Do Utilizador

If the LED flashes once, the module has passed all power-up tests and should 
operate correctly. The other flash sequences are shown below. Problems with the 
operating system can normally be fixed by reloading the operating system.  

Please contact Campbell Scientific if you are unable to resolve the problem. 

1 

SDM-CAN is ok. 

2 OS 

signature 

bad. 

           10 

OS downloaded has failed. 

The physical connection to the CAN-Bus is achieved by one of two methods 
which is by either the 3 way un-pluggable screw terminals or the 9 pin ‘D’ plug 
which conforms to CIA draft standard 102 version 2.  

The basic connections of the CAN-Bus to the three-way terminal are CAN High, 
CAN Low and 0V ground reference. The 3 way screw terminal is marked as       
‘G H L’ on the SDM-CAN case, where  G=Ground, H=CAN High, L=CAN Low. 

 The CIA, 9 pin, ‘D’ connector pin configuration is shown in Table 2-3. 

1 

Reserved, NOT INTERNALLY CONNECTED. 

2 CAN 

Low. 

3 CAN 

Ground. 

4 

Reserved, NOT INTERNALLY CONNECTED. 

5 CAN 

Shield. 

6 CAN 

Ground. 

7 CAN 

High. 

8 

Reserved, NOT INTERNALLY CONNECTED. 

9 

CAN +5volts. Input or output (see text). 

If the SDM-CAN hardware is configured (in either isolated or non-isolated mode) 
with the DC-DC converter ON, then Pin 9 of the 9 pin ‘D’ connector will provide 
+5V +/-10% at up to 40mA to any external device. If isolation is enabled and the 
DC-DC converter is set to OFF then this pin acts as an input for an external power 
supply capable of providing +5volts +/-10% at up to 100mA to provide power to 
the isolated circuitry of the SDM-CAN. 

The 3-way terminal block and CIA connector are connected in 
parallel internally and are not two separate connections to different 
CAN interfaces.