ITech IT-M3900D Series User Manual page 91

General Digital I/O Function
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In this chapter, all the pulse signals involved in the digital I/O function are
switched from high level to low level.
Signal definition
Digital I/O functions involve input and output levels and pulse signals. The in-
put signal is the control signal provided externally to , the output signal is the
level signal provided externally by , and the pulse signal is the edge signal
switched between high and low levels.
High level signal
Input signal
Low level signal
High level signal
Output signal
Low level signal
Level rise slope
Pulse Level fall slope
Width
Input/Output Function
The IO-1 ~ IO-7 pins are featured default function, the user can setting the
function of pin according to requirement. The Input and Output are the gen-
eral digital I/O function, and the parameter settings and functions of the sev-
en pins are the same.
The IO-1~IO-7 pins provide default functions. Users can realize control ac-
cording to the functions defined. Users can also reset the input or output
properties of the present pin and customize the function use of the pin ac-
cording to their needs.
– When pins 1 to 7 are configured to Output function, either high level
(False) or low level (True) can be Output.
– When pins 1 to 7 are configured to Input function, an external signal can
be Input to this pin, and the instrument can detect the state of the exter-
nal signal.
Copyright © Itech Electronic Co., Ltd.
Basic Operation
Typical: 5V
Range: 1.6V-15V
Current: ≤100mA
Typical: 0V
Range: -5V-0.8V
Current: ≤100mA
Voltage level: 5V
Current: ≤1mA
Voltage level: 0V
Current: 0.5mA
10us
2us
30us
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