Intel MB890 user manual JP9 COM2 RS232 Pin9 Setting, JP10 COM1 RS232 Pin9 Setting

INSTALLATIONS

JP6, JP7, JP8: RS232/422/485 (COM2) Selection COM1 is fixed for RS-232 use only.

COM2 is selectable for RS232, RS-422 and RS-485.

The following table describes the jumper settings for COM2 selection.

COM2	RS-232
Function
	JP6:
Jumper	3-5 & 4-6
Setting	JP7:
(pin closed)	3-5 & 4-6
	JP8:
	1-2

RS-422

JP6:

1-3 & 2-4

JP7:

1-3 & 2-4

JP8:

3-4

RS-485

JP6:

1-3 & 2-4

JP7:

1-3 & 2-4

JP8:

5-6

JP9: COM2 RS232 Pin9 Setting

Pin #

1

3

5

Signal Name	JP9	Signal Name	Pin #
RI		+12V	2
RI (Default)		RI (Default)	4
RI		+5V	6

COM2 Settings: Pin 1-2 short = +12V, Pin 5-6 short = +5V, Pin 3-4 RI Signal (default)

JP10: COM1 RS232 Pin9 Setting

Pin #

1

3

5

Signal Name	JP10	Signal Name	Pin #
RI		+12V	2
RI (Default)		RI (Default)	4
RI		+5V	6

COM1 Settings: Pin 1-2 short = +12V, Pin 5-6 short = +5V, Pin 3-4 RI Signal

MB890 User’s Manual 11