NetComm NTC-220 User Manual page 114

I T E M
IO configuration
IO Functionality Enables the configuration of the input and output pins on the four-way terminal block
connector.
Pull up voltage Specifies the output voltage of the I/O pins.
IO Manager Debug Use the slide bar to adjust the level of detail you would like to see in the log for IO messages.
level A higher debug level displays more detailed messages in the log file.
Per pin configuration
Pin The I/O pin number corresponding to the pin on the four-way terminal block connector that
you wish to configure.
Mode The mode of operation for the corresponding pin.
Available options are:
Pull up Use the pull up toggle keys to turn the pull up on or off for the corresponding pin.
When turned on, the pull up voltage output is the value specified in the "Pull up voltage"
option in the IO configuration section of this dialog box.
Value The value column displays whether the voltage detected on the line is low or high or allows
you to set the output value to high or low.
This can be useful for applications where monitoring of the transition between low and high
is used to trigger an action.
Important – Please refer to the SDK Developer Guide for hardware information about the Input/Output pins, wiring examples and
configuration of the pins via the command line interface. There are also wiring examples in Appendix J of this User Guide.
NTC-220 – User Guide
UG01028 v1.2 March 2019
• Digital Input – The corresponding pin accepts digital input. Pull up may be on or off
and both 3.3V and 8.2V are available as pull up voltages. The value column displays
whether the signal received on the pin is High or Low.
The default value is High. When the I/O pin is shorted to ground the value changes
to Low.
• Digital Output – The corresponding pin outputs a digital signal. Pull up may be on or
off and both 3.3V and 8.2V are available as pull up voltages. The value column
contains a toggle key allowing you to set whether the output signal is High or Low.
When set to Low, the output of the I/O pin is 0V. When set to High, the output of the
I/O pin is 5V.
• Analogue input – The corresponding pin accepts an analogue signal. Pull up may be
on or off and both 3.3V and 8.2V are available as pull up voltages. The value column
displays the current voltage detected on the pin.
• Namur input – NAMUR is a sensor standard using low-level current signals. It can
supply two different signal levels depending on the state of the switch and is
commonly used in hazardous or explosive locations where compact sensors are
required.
When a pin is set to NAMUR mode, Pull up is turned on and the global Pull up
voltage is set to 8.2V. These settings may not be changed for as long as a pin is set
to NAMUR mode as they are required settings according to the NAMUR IEC 60947-
5-6 standard. The value column displays whether the signal received on the pin is
High or Low.
• Contact closure input –A common type of digital input where a sensor or switch opens
or closes a set of contacts as a result of a process change. An electrical signal is then
used to determine whether the circuit is open or closed.
When a pin is set to Contact closure input, Pull up is enabled for that pin and may
not be turned off as long as the pin remains configured as a Contact closure input.
Global pull up voltage may be either 3.3V or 8.2V.
Table 31 – IO configuration options
D E S C R I P T I O N
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