Nortech Systems Adept RS-232/TERM - Manual (Page 59)

Connecting Customer-Supplied Digital I/O Equipment
Adept SmartController User’s Guide, Rev. E 59
XDIO Connector
The XDIO connector on the SmartController is a 50-pin, standard density D-Sub female
connector (see
Figure 3-1 on page 37 for location). There are 12 inputs and 8 outputs, each
optically isolated from the circuitry of the SmartController. The connector also provides
24V pins for powering customer equipment. There are four 24V pins and four ground
pins, which are limited to a total of 1A of current. The source of the 24V is the XDC1 or
XDC2 connector on the front of the SmartController.
Input Signals
The XDIO connector handles input signals 1001 to 1012. Each channel has an input and a
corresponding return line. See
Table 3-10 for input specifications. The connector pin-outs
are shown in Table 3-12 on page 63 .
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 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).
Table 3-10. DIO Input Circuit Specifications (XDIO connector)
Operational voltage range 0 to 24VDC
“Off” state voltage range 0 to 3VDC
“On” state voltage range 10 to 24VDC
Typical threshold voltage V
in
= 8VDC
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
= +24VDC 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