SLC 100/150 Communication Cable Pinout

G

Thread Starter

Glenn Covington

Need some help. I have searched the archives on this topic, but didn't find what I need. I am trying to establish communication with slc 100/150 plcs. Our original RS232 to RS422 converter from AB was made by B&B Electronics. It went from 25 pin female for the PC connection to a 8 Pin Din round connector for the SLC. It also has an external 12 Vdc power supply.

B&B was unable to identify our old cable, but recommended a model 422PP9TB RS 232 to RS422 converter. I now have the converter, but no pinout on the SLC 8 pin Din connector to know how to wire in the cable to the converter. I found a pinout in the archive, but it doesn't match what I have.

Looking a the front of the 8 pin Din connector numbering the pins clockwise from the key point.

Pin 1 Green Wire
Pin 2 Brown Wire
Pin 3
Pin 4 White
Pin 5
Pin 6 Black
Pin 7
Pin 8 Red
Shield

The new converter has connection for:

TD (A)
TD (B)
RD (A)
RD (B)
GND
+12V

If anyone has worked out the connection before please respond

Thanks in advance.
 
I went threw the same thing about six months ago. Here is what I found.

On the PLC:
pin 1 not/ RXD from remote device to slc
pin 2 RXD from remote device to slc
pin 3 TXD from SLC to remote device
pin 4 GND
pin 5 +12vdc
pin 6 +12vdc
pin 7 GND
Pin 8 not/ TXD from SLC to remote device

pins 4,5,6,7 are used for the pocket programmer.

AND DO NOT USE A SMART CABLE USE A SERIAL CABLE.

Good luck
Mike
 
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