
•
JUMPER
FUNCTION
OPTION
EFFECT
W11
DSR source selection
2/3
1/2
DSR from RS-232C input
Forces DSR active
W12
CTS source selection
2/3
1/2
CTS from RS-232C/RS-485 input
Forces CTS active
W13
DCD source selection
2/3
1/2
RI from RS-232C input
Forces RI active
W14
DCD source selection
2/3
1/2
DCD from RS-232C input
Forces DCD active
W15
RS-485 RXD/TXD
termination
short
open
Terminated (120 ohms)
Unterminated
W16
RS-485 RXD
termination
short
open
Terminated (120 ohms)
Unterminated
W17
RS-485 AUXIN
termination
short
open
Terminated (120 ohms)
Unterminated
W18
J2 pin 3
short
open
Grounds COM2 pin 3
J2 pin 3 carries RS-232C TXD
W19
J2 pin 5
short
open
Grounds COM2 pin 5
J2 pin 5 carries RS-485 A U X I N +
•
•
956 Manual
August 1994
Table 3-12. COMB Serial Port Jumper Functions
3-9