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CBM-920 User’s Manual
27 CITIZEN
6.2 Connector Connection Diagram
PIN SIGNAL NAME PIN SIGNAL NAME
1 ~ 8 N.C (not connected) 15 GND
9
R × D
16 FG
10
T × D
17 +5V(for circuit)
11 DTR 18 GND
12 PE 19 +5V(for mechanism)
13 FAULT 20 GND
14 RESET
6.3 Explanation of Input/Output Signals
1) I/O Signals into Printer (RS-232C)
• T × D (TRANSMIT DATA)
Serial transmit data signals.
• R × D (RECEIVE DATA)
Serial received data signals.
• DTR (DATA TERMINAL READY)
When this signal is in Ready (space), send data or a command.
If sending takes place in Busy (mark), overrun error is occurred.
Even in printing, data can be sent into the input buffer. If this signal is in Ready.
Further, Busy takes place also on supply of power, in test printing, on-line status or on occurrence of
resetting.