Schneider Electric INTERBUS Basic Network Interface Module Base, Scanning, Iec, IEC type 1 input

		Glossary
	I
I/O base		A mounting device, designed to seat an Advantys STB I/O module, hang it on a DIN
		rail, and connect it to the island bus. It provides the connection point where the
		module can receive either 24 VDC or 115/230 VAC from the input or output power
		bus distributed by a PDM.
I/O module		In a programmable controller system, an I/O module interfaces directly to the
		sensors and actuators of the machine/process. This module is the component that
		mounts in an I/O base and provides electrical connections between the controller
		and the field devices. Normal I/O module capacities are offered in a variety of signal
		levels and capacities.
I/O scanning		The continuous polling of the Advantys STB I/O modules performed by the COMS
		to collect data bits, status, error, and diagnostics information.
IEC		International Electrotechnical Commission Carrier. Founded in 1884 to focus on
		advancing the theory and practice of electrical, electronics, and computer
		engineering, and computer science. IEC 1131 is the specification that deals with
		industrial automation equipment.
IEC type 1 input		Type 1 digital inputs support sensor signals from mechanical switching devices such
		as relay contacts and push buttons operating in normal environmental conditions.
IEC type 2 input		Type 2 digital inputs support sensor signals from solid state devices or mechanical
		contact switching devices such as relay contacts, push buttons (in normal or harsh
		environmental conditions), and two- or three-wire proximity switches.

IEC type 3 input Type 3 digital inputs support sensor signals from mechanical switching devices such as relay contacts, push buttons (in normal-to-moderate environmental conditions), three-wire proximity switches and two-wire proximity switches that have:

a voltage drop of no more than 8 V

￿a minimum operating current capability less than or equal to 2.5 mA a maximum off-state current less than or equal to 1.5 mA

IEEE	Institute of Electrical and Electronics Engineers, Inc. The international standards
	and conformity assessment body for all fields of electrotechnology, including
	electricity and electronics.

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