Kroz Member K Join Date Mar 2003 Posts 15 Mar 5, 2004 #1 I have an Allen Bradley 1747 PIC unit that is not working. Does anyone have a schematic for this unit?
I have an Allen Bradley 1747 PIC unit that is not working. Does anyone have a schematic for this unit?
Contr_Conn Member Join Date Sep 2003 Location Ohio Posts 2,574 Mar 5, 2004 #2 I did some PIC repairs, no schematics but it is a simple RS232 to RS485 converter with power on DH485 coming from SLC and power for RS232 from PC port. It will not work on newer laptops. Most likely you have a bad optocoupler. Check them first.
I did some PIC repairs, no schematics but it is a simple RS232 to RS485 converter with power on DH485 coming from SLC and power for RS232 from PC port. It will not work on newer laptops. Most likely you have a bad optocoupler. Check them first.
panic mode Member Join Date May 2003 Location Toronto, Canada Posts 1,963 Mar 5, 2004 #3 I was fixing few of those too. Most common problem was simply the ribon cable with cuts on edges.