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Chapter 3: Operation
Table 3-10. DIO Input Circuit Specifications (XDIO connector)
Operational voltage range 0 to 30 VDC
“Off” state voltage range 0 to 3 VDC
“On” state voltage range 10 to 30 VDC
Typical threshold voltage V
in
= 8 VDC
Operational current range 0 to 7.5 mA
“Off” state current range 0 to 0.5 mA
“On” state current range 2.5 to 7.5 mA
Typical threshold current 2.0 mA
Impedance (V
in
/I
in
) 3.9 K
Ω
minimum
Current at V
in
= +24 VDC I
in
≤
6 mA
Turn-on response time (hardware)
Software scan rate/response time 5 µsec maximum
1 ms scan cycle/
1 ms max response time
Turn-off response time (hardware)
Software scan rate/response time 5 µsec maximum
1 ms scan cycle/
1 ms max response time
NOTE: The input current specifications are provided for reference; voltage sources are typically
used to drive the inputs.
NOTE: When the program task priorities are properly set, there is a 1 ms maximum latency for
the fast inputs when used with the eV+ INT.EVENT instruction.
In the following figure, example 1 shows inputs (1001 to 1004) with a negative common, exam-
ple 2 shows inputs (1005 to 1008) with a positive common, and example 3 shows inputs (1009
to 1012) with an independent power supply (no common).
NOTE: These are examples. Either method can be used on any channel.
Adept SmartController EX User’s Guide, Rev.C
Page 45 of 96