2 com1~com2: rs-232 interfaces, 3 com3: rs-232/422/485 interfaces, Com3 default settings – Advantech UNO-1170E User Manual
Page 18: 1 ti 16c550 uarts with 16-byte standard, 2 jumperless rs-422/485, 3 automatic data flow control function for rs-485, Com1~com2: rs-232 interfaces, Com3: rs-232/422/485 interfaces, Ti 16c550 uarts with 16-byte standard, Jumperless rs-422/485

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