Hypertherm board pinout for RS485 extension board

Enable is most likely the RS-485 transmit-enable signal
Its _probably_ active high. This is required for 2 wire
(1/2 duplex) RS-485 connections.

Why does the hyperterm use full duplex 4 wire rs485. This is only to set amps etc? can we get ark ok and voltage from the 485?
I thought it was only for setting the parameters for powermax.

The Hypertherrn interface is bi-directional you can set various parameters but also
read status and fault conditions.

Note that both 2 and 4 wire RS-485 interfaces are bidirectional, but only 4 wire
interfaces can transmit and receive at the same time (full duplex). 2 wire interfaces
transmit and receive on the same pair so must disable the transmitter when receiving
(1/2 duplex) Kind of like "push to talk"

bevins wrote: This is only to set amps etc? can we get ark ok and voltage from the 485?

The high end Hypertherms publish everything to the Ethernet BUS. So you don't even need to read the torch voltage. Its on the BUS.

good luck with the upgrade though!

bevins wrote: ......can we get ark ok and voltage from the 485?
...

no (Comms too slow)

all adjustable / setable or readable parameters in the manual

www.google.com/url?sa=t&source=web&rct=j...&cshid=1618781490208

PCW wrote: Enable is most likely the RS-485 transmit-enable signal
Its _probably_ active high. This is required for 2 wire
(1/2 duplex) RS-485 connections.

If thats the case a Texas Instruments SN65HVD34 would probably work as it has the required TX enable pin.
www.mouser.com/Texas-Instruments/Semicon...jc?P=1yxz5msZ1z0zls6

The SN65HVD31 chip used on the board I shared is more for a simpler UART with just TX and RX.