Serial Cable Information - OKIDATA ML590 Service Manual

Serial Cable Information

The information in this section will help you make a serial cable to connect between the printer
and computer.
Refer to the computer documentation to determine the cable requirements on the computers end.
The printer has the following cable requirements.
Shielded, RS-232C cable
UL and CSA approved
No more than 50 feet long
Cannon DB-25P plug (or equivalent) with 25 pins
Cannon DB-C2-J9 (or equivalent) connector shell
Serial Interface Signal Requirements
1 Protective
Ground
2 Transmit Data
3 Receive Data
4 Request to Send
5 Not Used
6 Data Set Ready
7 Signal Ground
8 to 10 Not Used
11 Supervisory
Send Data
12 to 19 Not Used
Service Guide ML590/ML591
Chapter 4 Failure & Repair Analysis
PG Ground
TD From Printer
RD To Printer
RTS From Printer
DSR To Printer
SG Ground
SSD From Printer
Connected to the printer
frame
Serial data transmitted to the
system
Serial data received by the
printer
Always set to low (mark)
Indicates that data can be
sent
Ground
Indicates that the printer is not
ready to receive data
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