Specifications

88
Input/Output (I/O) System The part of a control system that interfaces to the real world.
The I/O system accepts signals from switches and sensors, and
provides signals to actuating and display devices.
5 VDC, 24 VDC, 125 VDC
24 VAC, 120 VAC, 240 VAC
Discrete I/O Examples
Analog I/O Examples
0 to 10 VDC
-10 to + 10 VDC
4 to 20 mA
Processor
I/O
System
I/O
Devices
Low Voltage DC
Instrument Transformer A type of transformer used to sense the voltage or current of
associated conductors and provide proportional electrical energy
to measurement devices or circuits. A potential transformer (PT)
is used for voltage measurements and a current transformer
(CT) is used for current measurements.
Insulated Case Circuit
A type of circuit breaker that conforms to NEMA AB-1 and
Breaker UL 489 standards for molded case circuit breakers and is often
used as a main breaker in switchboards, motor control centers,
or in other applications requiring a molded case circuit breaker
with a high continuous current rating.
Insulated Gate Bipolar A type of transistor often used as a switching device in the
Transistor (IGBT) inverter section of a variable frequency drive. Voltage on the
gate element is used to control the current flowing between the
collector and emitter.
Gate
Collector
Emitter
Insulator A material with a high resistance to the flow of electrons. Plastic,
rubber, glass, and mica are examples of materials that are good
insulators.
International An organization based in Geneva, Switzerland with over 50
Electrotechnical national committees as full members. ANSI represents the U. S.
Commission (IEC) IEC writes international standards for electrical and electronic
technologies and practices.