Dp-501 - Epson DM-D500 Technical Reference Manual

DP-501

The connectors on the DP-501 are as indicated below.
Connector for computer connection
Connector for power supply unit connection
Connector for computer connection
This is the connector for connecting to a computer.
Pin assignments
Pin Num- Signal
ber Name
1 FG
2 TXD
3 RXD
4 (*1) RTS
6 (*2) DSR
7 GND
20 (*1) DTR
25 RESET
(*1) Make sure to use either the RTS or the DTR terminal. Otherwise, the built-in RS-232 driver IC may be broken.
(*2) This signal is connected to the DTR terminal of the printer directly.
66
DM-D connector
Signal
Direction
- Frame ground
Output (1) In a pass-through or Y connection, data sent from the printer to the host
(2) In a stand-alone connection, data sent from the display to the host
Input Data received from the host (Host -> display)
Output Same signal as DTR.
Input Indicates whether or not the host is ready to receive data.
[SPACE] The host is ready to receive data
[MARK] The host is not ready to receive data
- Signal GND
Output Indicates whether or not the display is ready to receive data. (*2)
[MARK] The display is not ready to receive data
The display enters the MARK status in the following cases:
(1) During power-on initialization
(2) During self-test
(3) The empty capacity of the receive buffer is 128 bytes or less
(4) When DSR enters the MARK status on printer selection
[SPACE] The display is ready to receive data
The display enters the SPACE status in the following cases:
(1) When power-on initialization finishes
(2) When self-test finishes
(3) When the empty capacity of the receive buffer recovers to 256 bytes or more
from 128 bytes or less
Input Reset signal for the printer
Connector for printer connection
Connector for power extension cable connection
Signal Function