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APPENDIX C Interfaces
TM-T60/T80
1. Specifications (RS-232C compatible)
Data transmission:
Serial
Synchronization:
Asynchronous
Handshaking:
DTR/DSR or XON/XOFF control
Signal level:
MARK =
-3 to -15 VDC: Logic “1”
SPACE =
+3 to +15 VDC: Logic “0”
Baud rates:
1200, 4800, 9600, 19200 bps
Bit length:
8 bits
Parity:
Invalid, even, odd
Stop bits: 1 bit or more
Connector:
D-SUB 25 pin connector
2. Interface connector terminal assignments and signal functions
Pin Number
Signal Name
1
FG (GND)
----------------------------------------------------
2
SD (TXD)
--------------------------------------
3
RD (RXD)
------------------------------------------
4
RS (RTS)
------------------------------------------------
6
DR (DSR)
--------------------------------------------------
7
SG (GND)
----------------------------------------------------
20
ER (DTR)
Output
---------------------------------------
Signal Direction
-
Output
Input
Output
Input
Function
Frame ground
---------------------------------------
Transmit data
----------------------------------
Receive data
----------------------------------------
The same signal as DTR
-----------------------
This signal indicates whether the host
computer can or cannot receive data.
"SPACE” indicates that the host computer
can receive data and “MARK” indicates that
the host computer cannot receive data.
When DTR/DSR control is selected, the
printer transmits data after checking this
signal.
When XON/XOFF controlis selected, the
printer does not check this signal.
-------------------------------------
Signal ground
This signal indicates whethar the printer can
or cannot receive data. when DTR/DSR
controlis selected. “SPACE" indicates that
the printer can receive date and ‘MARK”
indicates that the printer cannot receive data.
The signal turns to “MARK” in the following
cases:
When the recevie buffer becomes full.
When the printer is OFF-LINE.
When XON/XOFF control is selected, the
signal is always “SPACE" except
in the
following cases:
-During the period from when the power is
turned on to when data reception becomes
possible after the printer initialization is
completed.
When an error has occurred.
During and after the self-test printing.
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