Chapter 5 Connecting User-Supplied Digital I/O Equipment
112 Adept MV Controller User’s Guide, Rev. B
The input current specifications are provided for reference;
voltage sources are typically used to drive the inputs.
When the program task priorities are properly set, there is a
2 ms maximum latency for fast inputs 1001 to 1004 when used with
V
+
INT.EVENT instruction.
In the following figure, example 1 shows inputs (1001 to 1004) with a negative
common, example 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).
These are examples. Either method can be used on any
channel.
Table 5-5. DIO Input Circuit Specifications (JSIO connector)
Operational voltage range 0 to 24 VDC
“Off” state voltage range 0 to 3 VDC
“On” state voltage range 10 to 24 VDC
Typical threshold voltage V
in
= 8 VDC
Operational current range 0 to 6 mA
“Off” state current range 0 to 0.5 mA
“On” state current range 2 to 6 mA
Typical threshold current 2.5 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 16 ms scan cycle/
32 ms max response time
Turn off response time
(hardware)
Software scan
rate/response time
5 µsec maximum 16 ms scan cycle/
32 ms max response time
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