2
1. Shut down and turn OFF your computer.
2. Install input modules, output modules, or a mixture of input and output modules in sockets K1 through K4.
3. Set switches S1 through S4 to “IN” or “OUT” to match the type of modules installed in sockets K1 through K4. Refer to
Table 1.
NOTE
If any of sockets K1 through K4 are not used, set the corresponding switches to OUT.
4. Install output modules, only, in sockets K5 through K8.
5. If you have connected the SRA-01 to a PIO-12 or PIO-24 board and will be processing data via interrupts, then optionally
install an input module in socket K9 to isolate your interrupt signal source from the PIO-12/24 interrupt input.
WARNING
Install a module in socket K9 only if you have connected the SRA-01 to a PIO-12,
PIO-24, KPCI-PIO24, or KPCMCIA-PIO24 board. Otherwise, a potentially damaging
signal could be connected to pin 1 of the 37-pin D connector.
6. Connect your digital I/O board to the SRA-01 37-pin D connector, using available cables and accessories, as shown in
Figure 1.
If you make your own cables, use a standard 37-pin female D connector (Keithley part number SFC-37). Refer to Figure 2
and Table 1 for pin assignments.
Table 1
Module, switch, port, and connector-pin correspondence for module sockets K1 through K9
Module
socket
Corresponding
I/O selection
switch
Module type
that is
installed in
socket
Required I/O
switch setting
I/O port bit that
is connected to
module
Pin of 37-pin D
connector that
is connected to
module
K1
S1
Input
IN
PC3
26
Output
OUT
PB7
3
K2
S2
Input
IN
PC2
27
Output
OUT
PB6
4
K3
S3
Input
IN
PC1
28
Output
OUT
PB5
5
K4
S4
Input
IN
PC0
29
Output
OUT
PB4
6
K5
Not applicable
Output only
Not applicable PB3
7
K6
Not applicable
Output only
Not applicable PB2
8
K7
Not applicable
Output only
Not applicable PB1
9
K8
Not applicable
Output only
Not applicable PB0
10
K9
Not applicable
Input only
Not applicable Interrupt input of
PIO-12 and PIO-
24,
only
1
