Epson Multi-mode Data Controller MFJ-1278B Benutzerhandbuch

Many computers require a serial port adapter card.  These cards incorporate the circuitry 
necessary to add an RS-232C port to the computer.  Some popular models in this category are 
the Apple II series, the IBM Personal Computer, many Radio Shack computers, and the 
Sanyo MBC-55X series.  If you have one of these computers with an "add-in" serial port, or 
if you have another computer we haven't mentioned, you should skip to one of the sections on 
"other computers."  If your computer has a 25-pin RS-232C serial port, refer to the section on 
Other  Computers  with  25-pin  RS-232C  Ports.  Otherwise refer to the section  Other 
Computers with Nonstandard Serial Ports. 
 
Some computers have no serial port and no adapter is commercially available.  Such 
computers are not suitable for use with the MFJ-1278B. 

The Macintosh serial port is an RS-422 compatible port, but it will work fine with the RS-
232C serial port on your MFJ-1278B.   
 
MFJ Enterprises, Inc. offers an optional Starter Pack for the Macintosh. The Macintosh 
Starter Pack is available from MFJ Enterprises, Inc. or any dealer of MFJ products.  The 
Starter Pack includes a cable for  
 
connecting the MFJ-1278B to the Macintosh and a terminal program. The Starter Pack for 
Macintosh is MFJ-1287B.  If you wish to use your own cable, you will need a cable wired as 
shown in Fig. 2-1. 
 

1 (HSKO) 

4 

1 

1 

2 (HSKI) 

6 

5 

2 

3 (TXD-) 

2 

9 

3 

4 (GND) 

7 

3 

7 

5 (RXD-) 

3 

7 

8 

6 (TXD+) 

N/C 

6 

4 

7 (GPi) 

N/C 

 

 

 
Note that pin 1 of the DP-9P connector is not connected inside the Macintosh or the MFJ-
1278B.  We highly recommend the use of shielded cable, when making interconnections 
between the computer and the MFJ-1278B.  Connect both pin 1 on the Macintosh and pin 1