SLC 500 troubleshooting

Ensure the card is slid into the rack allowing both bottom and top clips to lock into place
Check that the entire rack has power
Allow a 1-5 min power cycle
Check pins on the back side of the card where a connection is made into the rack
Take the card out and do a visual inspection of the card outside of the rack, checking that resistors, capacitors, TRIACs and chips all look functional
Check to see that power supply is screwed into the rack and properly mounted

Make sure your RS-232 cable is making a good connection with both the computer and processor
Check that the proper COMM port and driver is being used in RS-Linx
For SLC 5/03 and up apply screwdriver across GND and VBB for 1 min, this will reset COMMS

Check power supply
Try inserting power supply into another rack
Check voltage going into power supply and ensure correct sumpers are selected if there any
Check pins on the back slide of the power supply that plug into the rack
Check manual for proper insulation and power requirements for multiple power supplies
Add your amperage rating for each device

If the rack is still not powering on, the application you are using could require more amperage than the supply is rated for

Example:

The 1747-L551 draws 1A at 5v DC

The 1746-OV16 requires 0.270 A according to documentation

The 1746-P2 supplies 5A at 5vDC to the backplane

Checking to see if our power supply can handle the load we would use the following formula:

IT=I1+I2+I3

Using this formula, we can see that since 1a + .27a = 1.27a ,

the 1746-P2 would handle this load no problem

If none of these solutions solve the problem, there could be a faulty card killing your whole rack

Remove each card one at a time to check if there is a card causing issues in the rack

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