Specifications

Confidential
EPSON
TITLE
SHEET
REVISION
NO.
SHEET NEXT
E
DM-D110
Specification
(STANDARD)
14 13
3.3 Host Interface
3.3.1 Host interface connector
The option stand provides the host interface connector (D-SUB 25 pin Female type) as shown in Figure
3.3.1.
1 13
25
14
Figure 3.3.1 Host Interface Connector
3.3.2 Host interface connector signal assignments
Table 3.3.1 Connector Signal Assignments
Pin
Number
Signal
Name
Signal
Direction
Function
1 FG - Frame ground
2 TXD Output 1) When the DM-D110 is connected with a pass through connection:
Transmit data to the host from the printer
2) When the DM-D110 is connected as a stand-alone:
Transmit data to the host from the DM
3 RXD Input
Receive data from the host (host → DM)
4 (*1) RTS Output Same as DTR
6 (*2) DSR Input Indicates whether the host is ready to receive data.
[SPACE] The host is ready to receive data.
[MARK] The host is not ready to receive data.
7 GND -- Signal ground
20 (*1) DTR Output This indicates whether the display is ready to receive data.
[SPACE] The display can receive data.
[MARK] The display cannot receive data.
[DTR MARK]
DTR goes to MARK under the following conditions:
➀ The period from when the power is turned on to when the display first
becomes ready to receive data.
➁ When the self-test is executed.
➂ When the remaining space in the receive buffer becomes 40 bytes or
less (buffer-full state).
➃ When [DSR MARK] is on, if the printer is selected by a peripheral device
command.
[DTR SPACE]
DTR goes to SPACE under the following conditions:
➀ When the display first becomes ready to receive data after power-on.
➁ When the self-test has ended.
➂ When the remaining space in the receive buffer becomes 50 bytes or
more after it became 40 bytes or less once.
25 RESET Input
Reset signal to the printer (host → printer)
NOTES (*1): Make sure to use either one of the RTS or the DTR terminal. Otherwise, the built-in
RS-232 driver IC may be broken.