Hi Michael.
Agree. I am not holding my breath. Nor would I hold Core support team up for criticism re this. There is probably a reason but I don’t think there is much chance of finding it.
Had a quick look at Core’s store and there is another unit using these resistor connections to the RS485 line. It is the Multi Converter SKU:‘TEL0070’. I looked through all the blurb I could find and there seems to be no mention of why they are there or what they are doing. I still think doing this unbalances the line and removes any advantages you have by using a balanced system. MAX485 application notes have no mention of this.
An interesting device would be an Industrial USB - RS485 Converter ‘SKU: CEO7325’. RS485 transmission distance quoted as 1200 metres with a max drop nodes as the usual 32. No mention of terminations but if they are quoting 32 nodes they must be external or switchable surely. Might be in included paper work if there is any. Could be handy if a situation arose where a USB connection is required at the other side of the house or shed etc.
Cheers Bob
