Epson DM-D110 Series, Technical Reference Manual

Page: 92 / 110

92
DM-D Connector (RS-232)
Type: RJ-45 Connector
Pin assignments

1 For a Y-type, pass-through, and standalone connection, refer to the "System Outline" on page 15 for details.

2 When using the status confirmation commands for ESC/POS command to change the DTR signals to MARK sta-
tus, the function differs from the signal function to show whether or not the display is ready to receive data.
Pin
Number
Signal
Name
Signal
Direction
Function
1 FG - Frame ground
2 TXD Output

Stand-alone connection:

Transmits data to the computer from the this product.

Pass-through/Y-type connection
*1
:

Transmits data to the TM printer from the computer.
3 RXD Input Receives data from the computer.
4 DSR Input Indicates whether the computer/TM printer is ready to receive data.

Stand-alone connection
*1

[SPACE]: The computer is ready to receive data.

[MARK]: The computer is not ready to receive data.

Pass-through connection
*1

[SPACE]: The computer is ready to receive data.

[MARK]: The computer is not ready to receive data.
5 RTS Output This indicates whether the display is ready to receive data.
*2

[SPACE]: The display can receive data.

DTR goes to SPACE under the following conditions:

When the display first becomes ready to receive data after power on.

When the self-test has ended.

When the remaining space in the receive buffer becomes 50 bytes or more
after having been 40 bytes or less.

[MARK]: The display cannot receive data.

DTR goes to MARK under the following conditions:

The period from when power is turned on to when the display first
becomes ready to receive data.

When the self-test is executed.

When the remaining space in the receive buffer becomes 128 bytes or less
(buffer-full state).

When DSR MARK is on, if the TM printer is selected by a peripheral device
command.
6 SG - Signal GND
7 PG - Power supply terminal
8 PG - Return wire for power
1 8