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INSTALLATIONS
COM2 is jumper selectable for RS-232, RS-422 and RS-485.
Pin # Signal Name
RS-232 R2-422 RS-485
1 DCD TX- DATA-
2 RX TX+ DATA+
3 TX RX+ NC
4 DTR RX- NC
5 Ground Ground Ground
6 DSR RTS- NC
7 RTS RTS+ NC
8 CTS CTS+ NC
9 RI CTS- NC
10 NC NC NC
J2: HDD Power Connector
Pin # Signal Name
1 +12V
2 Ground
3 Ground
4 5V
J3: Internal DC-In Power Connector
Pin # Signal Name
1 Ground
2 Ground
3 +12V or 19V
4 +12V or 19V
J5: LCD Backlight Setting
Pin # Signal Name
1 +12V
2 Backlight Enable
3 Ground
MB890 User’s Manual 17