27 Aug
2011
27 Aug
'11
10:52 a.m.
Well, USB-to-RS422 or RS485 adapters certainly exist. I suspect that
the reason that USB-to-20ma adapters are thin on the ground is that
most prefer to go USB-to-RS232-to-20ma, given power requirements and
the availability of RS232-to-20ma hardware.
The more bits you need to carry around with you, the more chansce that
hte essential bit is left on your workbench, or left, forgootne and some
remote site....
-tony