Operation Theorem
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4.5 Auxiliary Digital I/O
The eight auxiliary digital I/O lines on
JYTEK
Switch Modules provide
versatility to users’ control applications. Each digital I/O line can be input, output
or tri-stated. When in output mode, users can still read back the actual logic-
level on the I/O line. All digital lines are pulled-up to 5V with 10k ohm input
resistance.
Note that AUX[2..0] are dual function pins, driving these pins while enabling
handshaking or emergency shutdown functions, may falsely trigger the Switch
Module or external instruments.
Tri-state
Control
5V
DC
Figure 11: Auxiliary Digital I/O Function Block
DO
AUX Pin
DI
Feedback from output
Bus-Switch and
Protection
Circuit
10K
Ω
