Confidential

2.1.3 RS-485 Serial Interface

(An RS-485 serial is a factory option.)

2.1.3.1 Specifications (RS-485 compatible)

Data transmission:

Serial

 

Synchronization:

Asynchronous

 

Handshaking:

Depend on the DIP switch settings

 

(DTR/DSR or XON/XOFF control)

Signal levels:

2.0 to 5.0 V:

Logic 1

 

0.0 to 0.8 V:

Logic 0

Baud rates:

4800, 9600, 19200, 38400 bps

Data word lengths:

7 or 8 bits

 

Parity settings:

None, even, odd

Stop bits:

1 or more

 

Connector (printer side):

Female D-SUB25 pin connector

NOTES: The handshaking data word length, baud rate, and parity depend on the DIP switch (Refer to Section 3.3.3)

Data transmitted from the printer has 1 stop bit (fixed).

DR1 > DR2

CS1 > CS2 indicates that:

 

Channel 1 is high.

 

 

Channel 2 is low.

 

DR1 < DR2

CS1 < CS2 indicates that:

 

Channel 2 is high.

 

 

Channel 1 is low.

 

 

 

 

 

 

 

CS1

 

CS2

Function

 

H

 

L

Communication is available

 

L

 

H

Communication is not available

NOTE:

If the electric potential of CS1 is higher than that of CS2, the printer is ready for

 

 

communication (the host is ready to receive data). If the electric potential of CS1 is

 

 

lower than that of CS2, the printer is not ready for communication (the host is not ready

 

 

to receive data).

 

 

 

DR1

DR2

Function

 

 

H

 

L

Communication is available

 

 

L

 

H

Communication is not available

 

NOTE:

If the electric potential of DR1 is higher than that of DR2, the printer is ready for

 

 

communication (the host is ready to receive data). If the electric potential of DR1 is

 

 

lower than that of DR2, the printer is not ready for communication (the host is not ready

 

 

to receive data).

 

 

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Epson TM-T88III Series specifications 3 RS-485 Serial Interface, Specifications RS-485 compatible, CS1 CS2, DR1 DR2

TM-T88III Series specifications

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