Modular Interfaces
Spare Parts and Schematics
7-26
7.12
Modular Interfaces
7.12.1
Serial I/O (Option)
The serial interface supports the RS232C specification. The signals are received and
transmitted by a 9 pin connector.
Basically 3 lines are already enough for exchanging information between computer
and printer (one receive line, one send line, one line for common grounding).
7.12.1.1
Connector assignment
Transmission length: max. 15 m
Type
RS232C interface
Synchronization
Asynchronous
Transmission rate
600 Baud to 19.200 Baud
Signal status
OFF (log.1)–3 V to –15 V
ON (log. 0)+3 V to +15 V
Connection cable
up to 15 m length
Interface connections
ITT Cannon connector,
series DB-9 S
Transmission protocol
XON/XOFF, ENQ/STX, READY/
BUSY, Robust XON/XOFF, ETX/ACK
Capacity of data buffer
1024 KB max.
Connector no.
Direction
Printer–PC
Signal
3
→
TxD
4
→
DTR
2
←
RxD
6
←
DSR
7
→
RTS
8
←
CTS
5
⎯
Signal Ground SG
Shield
⎯
Frame Ground FG
5
1
6
9
Содержание 2365
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