Epson TM-T20III User Manual

88
Appendix
Functions of each connector pin
Pin no.
Signal
name
Signal
direction
Function
1FG - Frame ground
2 TXD Output Transmission data
3 RXD Input Reception data
4 RTS Output Equivalent to DTR signal (pin 20)
6 DSR Input This signal indicates whether the host computer can receive data.
SPACE indicates that the host computer can receive data. MARK indicates that
the host computer cannot receive data.
When DTR/DSR control is selected, the printer transmits data after confirming
this signal. (except if transmitted using some ESC/POS commands).
When XON/XOFF control is selected, the printer does not check this signal.
When you use this signal as the printer’s reset signal, the printer is reset when
the signal remains MARK for a pulse width of 1 ms or more.
7 SG - Signal ground
20 DTR Output 1) When DTR/DSR control is selected, this signal indicates whether the printer is
BUSY.
•SPACE status
Indicates that the printer is ready to receive data.
•MARK status
Indicates that the printer is BUSY. Select the BUSY condition in the
software setting mode.
2) When XON/XOFF control is selected, this signal indicates that the printer is
properly connected and ready to receive data from the host.
•SPACE status
The signal indicates that the printer is properly connected and ready to
receive data from the host.
The signal is always SPACE, except in the following cases:
•During the period from when power is turned on to when the printer is
ready to receive data.
•While the self-test is in progress.
25 INT Input The printer is reset if the signal remains at SPACE for a pulse width of 1 ms or
more.

Epson TM-T20III Specifications

General

Type	POS printer
Character sets	ANK
Print technology	Direct thermal
Maximum resolution	203 x 203 DPI
Maximum roll diameter	83 mm
Supported paper width	80 mm
USB port	Yes
USB connector	USB Type-B
Standard interfaces	RS-232, USB 2.0
Serial interface type	RS-232
Serial ports quantity	1
USB 2.0 ports quantity	USB 2.0 ports have a data transmission speed of 480 Mbps, and are backwards compatible with USB 1.1 ports. You can connect all kinds of peripheral devices to them.
Connectivity technology	Wired
Mean cycles between failures (MCBF)	60000000
AC input voltage	24 V
Power consumption	1800 mA
Power source type	AC
Power consumption (standby)	100 mA
Product color	Black
Safety	UL, CSA, TÜV
Certification	FCC-Class A, CE, EN55022-Class A
Country of origin	Philippines
Mounting position	Horizontal/Vertical
Autocutter durability	1.5 million cuts
Built-in sensors details	Roll paper cover open sensor, Paper End Sensor, Paper Near End Sensor
Sound pressure level (printing)	55 dB
Mean time between failures (MTBF)	360000 h
Storage temperature (T-T)	-10 - 50 °C
Operating temperature (T-T)	5 - 45 °C
Operating relative humidity (H-H)	10 - 90 %
Package depth	235 mm
Package width	192 mm
Package height	280 mm
Package weight	2620 g
Quantity per pack	1 pc(s)
Ethernet LAN	No
Quantity per pallet	112 pc(s)
Quantity per pallet (UK)	168 pc(s)
Master (outer) case width	400 mm
Quantity per pallet layer	16 pc(s)
Master (outer) case height	295 mm
Master (outer) case length	490 mm
Master (outer) case weight	0 g
Harmonized System (HS) code	84433210
Quantity per pallet layer (UK)	24 pc(s)
Quantity per master (outer) case	4 pc(s)

Weight and Dimensions

Depth	199 mm
Width	140 mm
Height	146 mm