Basic Operation
5.11 Digital I/O Function (Digital Port)
The IT8000 series load supports digital I/O function. The user can realize logic
control over high and low level input or output by related configurations in the
system menu, namely general digital signal I/O function. In addition to general
digital I/O functions, this series can be customized to meet different special
needs through different pin wirings. For example, you can connect a pin to an
external instrument, and set a fixed pulse or level signal for the external instru-
ment. Once the external instrument fails, output this pulse or level signal. After
the instrument identifies this signal, it controls whether the load input is reduced
to 0 or whether the [On/Off] is switched off based on related settings.
The rear panel of the instrument has a green 8-pin terminal (For position, see
1.5 Rear Panel Introduction). The terminal is a wiring terminal with digital I/O
function. These pins are bi-directional I/O interfaces. For hardware index infor-
mation, see Table 5–2 Hardware parameters of the I/O interface. The pins sup-
port the input or output of pulse and high and low level. Different pins can
achieve different functions.
Table 5–2 Hardware parameters of the I/O interface
Voltage range -5V to +15V
Maximum low level output
voltage
Low Level (V) Maximum current
(mA)
0.65 10
0.9 50
1 100
Maximum low level input
voltage
0.8V
Typical high level output
voltage
5V
Typical low level current 0V 0.5mA
Minimum high level input
voltage
1.6V
Level rise slope 10us
Level fall slope 2us
Copyright © Itech Electronic Co., Ltd.
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