Epson TM-T20II Technical Reference Guide

90
RS-232 Serial Interface
Interface board specifications (RS-232-compliant)
Item Specifications
Data transfer method Serial
Synchronization Asynchronous
Handshake Select one of the following with the memory switch:
 DTR/DSR  XON/XOFF
Signal level MARK -3V to -15V logic “1”/OFF
SPACE +3V to +15V logic “0”/ON
Transmission speed Select one of the following with the memory switch:
2400/4800/9600/19200/38400/57600/115200 bps
[bps: bits per second]
Bit length Select one of the following with the memory switch:
 7 bit  8 bit
Parity Select one of the following with the memory switch:
 None  Even  Odd
Stop bit 1 or more bits
However, the stop bit for data transfer from the printer is fixed to 1 bit.
Connector DSUB 25-pin (female) connector

Epson TM-T20II Specifications

General

Type	POS printer
Print technology	Direct thermal
Maximum resolution	- DPI
Maximum printing width	80 mm
Ethernet LAN	No
USB port	Yes
USB 2.0 ports quantity	1
Connectivity technology	Wired
Product color	Gray
Input current	1.8 A
AC input voltage	100 - 240 V
AC input frequency	50 - 60 Hz
Mean time between failures (MTBF)	360000 h