NOTE: THESE ARE GENERAL TIPS – REFER TO THE INSTRUMENT MANUFACTURER FOR SPECIFIC RECOMMENDATIONS
For RS485 / RS422 Multidrop applications, it is essential that correct daisy-chain wiring is used. The most common mistake in RS485 wiring is not having a true “Daisy Chain”. When instruments are mounted in cabinets it is logical to not take the daisy chain all the way to the controllers but to daisy chain the cabinets.
We recommend and can supply B&B electronics convertors, specifically:
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.
(C) 2014 SpecView Corp & SpecView Ltd. Page Updated: 19 June 2018
SCADA software for people with other jobs!