NetComm NWL-12-01, Руководство пользователя

Страница: 82 / 142

82
NetComm Wireless 3G Light Industrial M2M Router www.netcommwireless.com
The table below describes the different modes available on the physical I/O pins of the router.
MODE DESCRIPTION
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.
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.
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 20 - IO configuration options
Note: 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 I of this User Guide.
Contact NetComm Wireless Technical Support for access to the Software Development Kit.