How to Install an Epson POS Printer
Point of sale (POS) registers require printers to provide receipts to customers. The most popular printer in the U.S. has been IBM's 4610 series. Other manufacturers make POS printers as well. NCR and Epson make printers that can be used as a replacement for the 4610 series of printers. These printers are attached to the register via a serial cable. If the terminal is an IBM 4694 series, the printer can be attached via RS232 or RS485.
Instructions
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RS485 Attached Printer
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1
Power off the register either with the power switch or by unplugging the register. Connecting the printer to a live register may damage the printer.
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2
Look on the back of the register there are several ports that are numbered. Port 7 is dedicated for printers. That port is the widest port on the register.
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3
Plug the cable into the printer first, then into the register. The cable should lock into place; if it does not, check the cable end.
RS232 Attached Printer
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4
Attach the power supply to the printer. Most POS printers use a 24-volt power supply; use only a power supply designed for your Epson printer.
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5
Attach the RS232 serial cable to the printer. Read your Epson printer installation manual because it is important to know which end of the cable is attached to the printer and which is attached to the terminal.
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6
Install the printer driver to the POS controller. It is the controller's job to send the printer code to the terminal on boot up.
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7
The printer will have a set of dip switches that set the printers communications baud rate. The baud rate must be the same on both the register and the printer for it to work correctly. By default, the baud rate should be 9,600 bps.
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8
Power off the register and attach the serial cable from the printer to the register. When the register is booted, the printer driver should be installed and the printer will be ready to use.
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Tips & Warnings
Not all POS registers support Epson printers; you may need to have a professional write a printer driver.
RS485 ports are powered, so plugging any device in while the register is powered on can cause damage to both the register and the device.