Epson TM-T81III Technical Reference Guide

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Appendix
RS-232 Serial Interface
Interface board specifications (RS-232-compliant)
Item Specifications
Data transfer method Serial
Synchronization Asynchronous
Handshaking Select one of the following in the software setting mode.
 DTR/DSR
 XON/XOFF
Signal level MARK -3V to -15V logic “1”/OFF
SPACE +3V to +15V logic “0”/ON
Bit length Select one of the following in the software setting mode.
 7 bit
 8 bit
Transmission speed Select one of the following in the software setting mode.
2400/4800/9600/19200/38400/57600/115200 bps
[bps: bits per second]
Parity check Select one of the following in the software setting mode.
 Yes
 No
Parity selection Select one of the following in the software setting mode.
 Even
 Odd
Stop bit 1 or more bits
However, the stop bit for data transfer from the printer is fixed to 1 bit.
Connector Printer side D-Sub 9-pin (male)

Epson TM-T81III Specifications

General

Print Method	Thermal line printing
Resolution	203 x 203 dpi
Paper Width	79.5 ± 0.5 mm
Auto Cutter	Yes
Interface	USB, Serial
Dimensions	140 x 199 x 146 mm
Paper Thickness	0.06 to 0.08 mm