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Chapter 3 - SSP Installation (XVME-956/400)
W1
1
W1
2
W1
3
W1
4
W15
W16
W17
W18
W19
RS-232C
.
2/3
2/3
2/3
2/3
open
open
open
open
shrt
RS-485 Full Duplex _
1/2
2/3
1/2
1/2
open
shrt
shrt
shrt
open
RS-485 Half Duplex
1/2
1/2
1 / 2
1/2
*
open
open
shrt
shrt
* Install short on W15 to terminate RS-485 signal line. R S -485 termination should be installed at
the
two ends
of the line.
3.3.3 S e r i a l Port Configuration and Connection
The RS-232C port at J2 COMB requires configuration beyond the choice of I/O base address and
interrupt described in the previous sections. The serial port at J2 can be configured to operate as a RS-
232C or RS-485 port. Jumpers W11 - W14 and W18 - W19 determine the functions of individual
interface lines on connector J2. Jumpers W15 - W17 install line terminators. Implement your choice
by setting jumpers W11 - W19, according to Table 3-11.
Table 3-11. C O M B Serial Port Interface Jumpers
3-8
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