NX12
Micro GSM RTU
© Nortech Management Ltd, United Kingdom
Page 9 of 25
4
NX12 RTU
Firmware Functions
The features below describe the functionality offered by the latest version of NX12
firmware at the time of writing.
4.1
Clock
The RTU has an internal Real Time Clock (RTC). The clock is synchronised with the
iHost system clock on a regular basis.
Date/time stamping in Event and System logs is recorded to 10ms in granularity.
4.2
Inputs / Outputs
There are 16 digital inputs. These can be individually configured to operate as
either a Binary Input or as 16-bit Counter Input.
There are 8 analogue inputs with 8-bit resolution.
There are 8 output lines.
The RS485 serial port is used to collect additional data from external devices via
the Modbus RTU protocol
–
contact Nortech for a list of supported devices.
4.3
Auxiliary Supply On/Off
The incoming auxiliary supply line is monitored. The default setting is to date/time
stamp changes of state (loss / restoration) and to immediately report them to the
iHost system.
A configurable debounce timer can be used to extend the period that the auxiliary
supply must change state before an event is logged and reported.
4.4
Binary Inputs
The following features are supported and remotely configured for each input
individually:
Enabled
The input is monitored.
Status
Closed or Open. Status is reported to the iHost during
every communication.
Debounce
How long the input must be open (or closed) before a
change of state is confirmed.
Log Open
Yes = create a date/time log entry when the input
changes from Closed to Open.
Log Close
Yes = create a date/time log entry when the input
changes from Open to Closed.
Report on Open
Yes = initiate an immediate iHost communication as
soon as an Open event is generated.
Report on Close
Yes = initiate an immediate iHost communication as
soon as a Close event is generated.
In ideal conditions, the processor detects changes of state within 10ms.
