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We recommend and can supply B&B electronics convertors, specifically:
- For RS232 to RS485/RS422: Use 485OI9TB with 485 PS2 power supply. Note: the convertor must be plugged directly into the RS232 port on the PC or connected using a 9-pin extension cable that has all 9 wires connected. Note that not all USB-to-serial convertors work properly, especially the cheap ones!
- For USB connections we recommend USOPTL4, this is a USB-to-RS485 convertor.
The B&B convertors listed above support “Automatic send data control” and so work very well with SpecView.
We do not recommend using non-isolated port powered convertors or internal 485/422 cards in industrial applications.
See here for more details on RS232 / RS485 / RS422
See here for help troubleshooting comms.
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