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Allows the use of thumbwheel switches for feeding information to the PLC to be used in the control program.
THUMBWHEEL MODULE
They are used in applications involving accurate high-speed machining and packaging operations.
MOTION AND POSITION CONTROL MODULE
They can be changed while the power is on and the PLC is running.
Hot swappable I/O modules
Runs user-written BASIC and C programs. These programs are independent of the PLC processor and provide an easy, fast interface between remote foreign devices and the PLC processor.
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Specifies two values: a minimum ON-state voltage that is the minimum voltage at which logic 1 is recognized as absolutely ON; and a maximum OFF-state voltage which is the voltage at which logic 0 is recognized as absolutely OFF.
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This value specifies the minimum input current that the discrete input devices must be capable of driving to operate the input circuit. This input current value, in conjunction with the input voltage, functions as a threshold to protect against detecting noise or leakage currents as valid signals.
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It is provided for AC and DC output modules by either fuses or some other current-limiting circuitry. This specification will designate whether the particular module’s design has individual protection for each circuit or if fuse protection is provided for groups (e.g., 4 or 8) of outputs
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It is about a module's ability to stop interference from affecting data quality within a single channel and across channels. It's measured in decibels or as a ratio. Using twisted pair wires helps reject noise picked up equally by both wires, ensuring better data integrity.
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It is the length of time a PLC can tolerate a power loss, typically ranges from 10 ms to 3 s.
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• Ground yourself by touching a conductive surface before handling static-sensitive components. • Wear a wrist strap that provides a path to bleed off any charge that may build up during work. • Be careful not to touch the backplane connector or connector pins of the PLC system (always handle the circuit cards by the edge if possible). • Be careful not to touch other circuit components in a module when you configure or replace its internal components. • When not in use, store module in its static-shield bag. • If available, use a static-safe work station
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