DH485 network

[Ben 1]

Hi, I have some legacy hardware 5/03 and PV550 with DH485 ports. I've never worked on the DH485 nework so kinda new... I think I read somewhere, the last nodes on DH485 should be have terminating resistor, but PLC and HMI has this RJ45 connector so unlike the phoenix type connector there is no jumper points (or at least I'm not aware). So how to do this. Second, I want to put a programming port on panel (on DH485 network) so that I can program both PLC and HMI without opening the enclosure. What is the best way to do this? Another way I'm thinking is to connect the PV550 directly with 5/03 on DH485, and use the RS232 port of the 5/03 as programming port. I hope there is a pass-through possible for programming PV (DF1>5/03 port2 > 5/03 port1 > PV550!). However, I'm again not sure about the termination thing. I also have 1761-Net-AIC but if not required, I'd rather save it.

[Mickey 71]

See PDF's below for how to connect your SLC5/03's DH485 port to your PV. Also see PDF below for how to setup your SLC5/03 for passthru communication. No need for termination with the below setup. DH485 Network with PV.pdf SLCDF1toDH485PassThru.pdf

[Ben 1]

Thanks a Lot Mickey.

[Mickey 71]

Your welcome, let us know how it works out.