User Manual

34 | SMSEagle NXS-9700-3G | User’s Manual
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Digital input/output
The NXS- family of SMSEagle devices is equipped with digital inputs (DI) and digital outputs (DO). The digital
inputs can be used to receive signals from outside sensors or devices and automatically trigger sending of
SMS message based on input state. On the other hand the digital outputs may be used to activate external
devices connected to the outputs when certain SMS messages are received by SMSEagle.
Number of available DI/DO ports depends on hardware revision:
Port type
Hardware Rev.3
Hardware Rev.2, Rev.1
DI
4
2
DO
4
2
The logical states of inputs and outputs of SMSEagle NXS-family of devices are represented by the following
states:
Logical level
Hardware Rev.3
Hardware Rev. 2, Rev.1
LOW (0)
Closed
0 V
HIGH (1)
Open
+5 V