Optiquest iRIS 220 manual 3.4 I/O Connector, Internal Battery iRIS 320 / iRIS 320V only

iRIS 220 / iRIS 320, V1.19 User Guide - 14

3.4 I/O Connector

All I/O and power supply terminations are via 5mm (0.2”) screw terminals provided on a 16-way pluggable connector. The older (V1.1) PCB has a 12 way connector - see Appendix D – Legacy PCB (Rev 1.1) Details. The I/O connector is positioned on the right hand side of the iRIS 320 circuit board, directly above the white battery connector. On the iRIS 220, the connector protrudes through the top of the case.

The function of each I/O termination is shown in the diagram below.

TOP
	AI4	Analog Input #4
	AI3	Analog Input #3
	AI2	Analog Input #2
	AI1	Analog Input #1
	AGND	Analog Common Ground
	5VOP	5V Reference Output
	DI2	Digital Input #2
	DI1	Digital Input #1
	DO2	Digital Output #2
	DO1	Digital Output #1
	SDI-12	SDI-12 Data Bus
	DGND	Digital Common Ground
	12V+	12Vdc Internal/External Battery Supply +
	GND (-) 0Vdc Internal/External Battery Supply -
	VIN+	15-30Vdc External Power Supply (Charger Input) +
	GND (-)	0Vdc External Power Supply (Charger Input) -

BOTTOM

Figure 4 - I/O Connector

3.4.1 Internal Battery (iRIS 320 / iRIS 320V only)

The iRIS 320 / iRIS 320V are supplied with an internal rechargeable 12V 0.8A/Hr sealed lead-acid battery. Upon installation, you will need to connect this battery as it is shipped disconnected to preserve battery life. It should also be disconnected if the unit is not going to be used for some time.

NOTE: The iRIS 220 does not have an internal battery, so ignore all references to the internal battery for the iRIS 220 models.

For maximum flexibility, the iRIS I/O connector has two terminals provided for additional 12V power supply flexibility. These terminals (marked 12V+ and GND) can either be used to deliver 12V from the internal battery out to power an external sensor or other small load, or alternatively be connected to an external 12V battery (for greater battery capacity) or a 12V d.c battery charger type power supply. See the next two sections on using the 12V terminals and the external (charger) power supply feature.

WARNING! iRIS 320 / iRIS 320V INTERNAL BATTERY

The +12V and GND terminals of the I/O connector are effectively connected directly in parallel with the internal 12V battery. A resettable semiconductor fuse is fitted for short-circuit protection.

However, only connect 12V lead-acid batteries or a regulated d.c power supply that is designed for charging a 12V lead-acid battery, to these terminals.

Applying a voltage higher than 14.5V for a sustained period to these terminals will permanently damage the internal battery and may cause an acid leak and/or an explosion.

14 iQuest (NZ) Ltd - PO Box 15169, Hamilton, New Zealand Tel: +64 7 857-0810 Fax: +64 7 857-0811 Email: iquest@iquest.co.nz