Operator's Guide B-13

First, the Signal Ground on the printer is tied to the Signal Ground on the IBM PC/AT; likewise, the Frame Grounds on the printer and IBM PC/AT are tied together. Next, RxD on the printer (Pin 3) is tied to TxD (Pin 3) on the IBM PC/AT; then TxD (Pin 2) on the printer is tied to RxD (Pin 2) on the IBM PC/AT. Lastly, the control signals are connected: DTR (Pin 20) on the printer to DSR (Pin 6) on the IBM PC/AT, and RTS (Pin 4) on the printer to CTS (Pin 8) on the IBM PC/AT.

IBM PC/AT to Printer Wiring Diagram

AB0-AP

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Epson 4100 manual AB0-AP