IBASE Technology IB885, User Manual

Page: 13 / 58

INSTALLATIONS
JP1, JP2, JP3: 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 describes the settings for COM2.
COM2
Function
RS-232 RS-422 RS-485
Jumper
Setting
(pin closed)
JP3:
1-2
JP2:
3-5 & 4-6
JP1:
3-5 & 4-6
JP3:
3-4
JP2:
1-3 & 2-4
JP1:
1-3 & 2-4
JP3:
5-6
JP2:
1-3 & 2-4
JP1:
1-3 & 2-4
COM2 is jumper selectable for RS-232, RS-422 and RS-485.
Pin # Signal Name
RS-232 R2-422 RS-485
11 DCD TX- DATA-
13 RX TX+ DATA+
15 TX RX+
NC
17 DTR RX- NC
19 Ground Ground Ground
12 DSR
NC NC
14 RTS NC NC
16 CTS NC NC
18 RI NC NC
20 NC NC NC
JBAT1: Clear CMOS Setting
JBAT1 Setting
Normal
Clear CMOS
JP4: ATX or AT Power Selection
JP4 ATX Power
ATX
AT
IB885 User’s Manual 9