Neousys IGT-30 Series, Руководство пользователя

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IGT-30 Series
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7. Digital Input and Output
There are eight built-in isolated digital inputs and two digital outputs on IGT-30D and
IGT-31D. These digital inputs and outputs are designed for industrial usage and are
compatible with most commercial-on-the-shelf buttons, switches, indicators, etc.
7.1 Mode of Digital Inputs
A digital input is usually used to acquire the status of a device out of two expected
states, usually named on or off. Though there are only two states, the types of
signals could be diversified. In terms of current direction, these devices can be
divided into 3 types and they are sink, source or dry contact.
A sinking digital output means current flows into the digital output when it is on, while a
sourcing digital output means current flows out of the digital output. Most electric sensors,
such as proximity sensors and photoelectric sensors fall into this two categories. Dry
contact is an output type which is simply open or short, but polarity do not matter. Most
mechanical switches, such as limit switch and buttons fall into this category.
The built-in digital input channels of IGT-30D and IGT-31D support all three types. By
default the digital inputs are set to accept either sinking or sourcing outputs. To
enable dry contact support, please set the dry contact mode switches (please refer to
the illustration below) of the corresponding digital input channel to the “ON” position.
Please only set it to the “ON” position if the digital input channel is connected to a dry
contact output. Incorrect setting might damage the input channels.
Starting from the dip switch closes
to the SIM card slot.
Dip switch: 0 (correspond to X1.3)
Dip switch: 1 (correspond to X1.4)
Dip switch: 2 (correspond to X1.5)
Dip switch: 3 (correspond to X1.6)
Dip switch: 4 (correspond to X1.7)
Dip switch: 5 (correspond to X1.8)
Dip switch: 6 (correspond to X1.9)
Dip switch: 7 (correspond to X1.10)
Please refer to Digital Input
Connector X1 for details. Dip switches on the motherboard. To gain access,
please refer to the mini PCIe installation section for
system disassembly.