Cutler Hammer used a software called PanelMate for those displays. I don't remember for sure but I think a standard RS232 cable or a RS232 cable with a null modem adapter to switch wires on pin2 and pin3 is what you need. The PM in the model number is a clue. Let me know if you need more help. If I miss your post in the thread, just send me a PM and it will send me an email notification.