There are three steps to Install the MK-2285 in a PC's RS-232 I/F.
Step 1 : Configure MK-2285 Interface
The MK-2285 can be configured as RS-232 to RS-422 or RS-232 to RS-485.
The MK-2285 is factory set as RS-232 to RS-422. Therefore, if you
wish to use the MK-2285 as RS-232 to RS-422 converter, please skip
this step. If you wish to configure MK-2285 as RS-232 to RS-485, you
have to open the MK-2285 to re-configure the MK-2285. The following
is the configuration for RS-422 and RS-485 configurations.
Step 2 : Provide MK-2285 power supply
The MK-2285 requires a +5V (20 mA) power supply. It can be powered
through pin 9 of the RS-232 connector.
PM-i386XC/PM-i486XC or PM-i486DX RS-232 I/F
If you wish to convert and connect the MK-2285 to the
PM-i386XC/PM-i486XC or PM-i486DX all-in-one CPU card, just
adjust the jumper setting in the PM-i386XC/PM-i486XC or
PM-i486DX CPU card. The PM-i386XC/PM-i486XC and PM-i486DX
provide jumpers to change RS-232 I/F pin 9 from RI input
signal to +5V power supply.
Other RS-232 I/F
If the RS-232 I/F you wish to convert and connect to the
MK-2285 is a standard PC's RS-232 I/F, you have to make a wire
jumper to supply +5V to pin 9 on the RS-232 connector. The
standard PC's RS-232 I/F pin 9 is defined as RI (Ring). It is
an input singal, therefore, it is O.K. to make a wire jumper
to connect it to +5V,
You may also purchase MK-422-PS2 or MK-485-PS2 to connect
+5V power supply from Personal Computer's PS/2 interface.
Step 3 : Connect MK-2285 to RS-232 I/F
Connecting the MK-2285 to the PC's RS-232 I/F is simple and easy.
Just plug the MK-2285 RS-232 end (9 pin D-type female connector) to
the standard RS-232 I/F (9 pin D-type male connector), and then secure
two mounting screws.