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6.6 sDIO Digital I/O Signals
The sDIO module's digital I/O signals are 64 optically-isolated digital I/O channels (32 output
and 32 input). They are wired to connectors X1 through X4, which are located on the front of
the sDIO module (see the figure sDIO Connectors and Indicators on page 65). The electrical
specifications for the inputs are similar to the XDIO inputs, but have a different wiring con-
figuration. The sDIO inputs cannot be used for REACTI programming or high-speed interrupts.
See the eV+ Language User's Guide for information on digital I/O programming.
NOTE: The signals on the sDIO connectors can be superseded by another sDIO module that is
installed and addressed as sDIO #1. To use two sDIO modules, address the first as sDIO #1 and the
second as sDIO #2.
sDIO Inputs
The 32 input channels are arranged in four groups of eight. Each group is electrically isolated
from the other groups and is optically isolated from the sDIO module's circuitry. The eight
inputs within each group share a common ground.
The inputs are accessed through the two female 26-pin D-sub input connectors on the front of
the sDIO module. Each connector provides access to two input groups. Each group requires
ten pins: eight input signals, and two ground references. An input is activated by providing a
positive potential on its input pin relative to the ground pin of its group. This type of input is
considered sinking. That is, current must flow into the input pin to turn it on.
Operational voltage range
"Off" state voltage range
"On" state voltage range
Typical threshold voltage
Operational current range
"Off" state current range
"On" state current range
Typical threshold current
Impedance (V
Current at V
Turn on response time (hardware)
Software scan rate/response time
Turn off response time (hardware)
Software scan rate/response time
Chapter 6: sDIO Module
Table 6-2. sDIO Input Specifications
/I
)
in
in
= +24 VDC
in
Adept SmartController EX User's Guide, Rev.C
Page 72 of 96
0 to 30 VDC
0 to 3 VDC
10 to 30 VDC
V
= 8 VDC
in
0 to 7.5 mA
0 to 0.5 mA
2.5 to 7.5 mA
2.0 mA
3.9 K Ω minimum
≤ 6 mA
I
in
5 µsec maximum
1 ms scan cycle/
1 ms max response time
5 µsec maximum
1 ms scan cycle/
1 ms max response time
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