Optiquest iRIS 320 SDI-12 Interface, Diagnostic LEDs, Interface Wire Terminal SDI-12 Bus Function

iRIS 220 / iRIS 320, V1.19 User Guide - 68

13.3 SDI-12 Interface

The original (PCB revision 1.1) iRIS 320 / iRIS 320V models supported the connection of SDI-12 instruments via a psuedo SDI-12 interface. This requires the installation of a small interface adaptor that enables the iRIS to use two of its digital I/O (DI2 and DO2) to provide the SDI-12 communication. The photograph below shows how the SDI-12 interface adaptor should be installed. The interface wire colours and their functions with respect to the SDI-12 bus are:

Interface Wire	I/O Terminal	SDI-12 Bus Function
Red	12V+	+12V Supply
Black	GND	0V (Ground)
Purple	DO2
White	DI2	Data

Figure 16 - Legacy SDI-12 Interface Connections

NOTE: The DI2 input debounce link must be removed for the SDI-12 function to work correctly. See the section above (Section 13.2) shows the link positions on the V1.1 PCB.

13.4 Diagnostic LEDs

The iRIS has several internal LED indicators that are useful for diagnostic purposes. Please note that these indicators are only active in certain power management modes (see the features section 2.8.4 for details on power management).

NOTE: The diagnostic LEDs are only visible if the PCB (printed circuit board) is exposed. For the iRIS 220, the electronic assembly must be removed from the case. For the iRIS 320, the front of the case must be opened.

232 RX	Flashes green when data is received from the RS232 port.
232 TX	Flashes green when data is transmitted out the RS232 port.
SKT A RX	Flashes green when ASCII data is received via the wireless modem on socket A.
SKT A TX	Flashes green when ASCII data is transmitted via the wireless modem on socket A.
SKT B RX	Flashes green when a System DO (binary) data packet is received via the wireless
	modem on socket B.
SKT B TX	Flashes green when a System DO (binary) data packet is transmitted via the
	wireless modem on socket B.
DIGIN #1	Illuminated orange when Digital Input #1 is active (pulled down to 0V).
DIGIN #2	Illuminated orange when Digital Input #2 is active (pulled down to 0V).
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