Chapter 8 Analog Input Option Board (XBO-AD02A)
8.7.1 Precaution for wiring
(1) Don’t let AC power line near to A/D conversion module’s external input sign line. With an enough
distance kept away between, it will be free from surge or inductive noise.
(2) Cable shall be selected in due consideration of ambient temperature and allowable current,
whose size is not less than the max. cable standard of AWG22 (0.3㎟).
(3) Don’t let the cable too close to hot device and material or in direct contact with oil for long, which
will cause damage or abnormal operation due to short-circuit.
(4) Check the polarity when wiring the terminal.
(5) Wiring with high-voltage line or power line may produce inductive hindrance causing abnormal
operation or defect.
(6) Enable only needed channels
8.7.2 Wiring examples
*(a) In case of current input, connect V+ terminal to I+ terminal
*(b) Input resistance of current input circuit is 250 Ω (typ.).
*(c) Input resistance of voltage input circuit is 1 MΩ (min.)
(3) Terminal block configuration
+
-
+
-
CH0
CH1
V0+
I0+
V1+
I1+
COM
R
R
R
R
R
R
XBO-AD02A
*(a)
*(b)
*(c)
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