Relay logic is a method of implementing combinational logic in electrical control circuits by using several electrical relays wired in a particular configuration...

Ladder logic was originally a written method to document the design and construction of relay racks as used in manufacturing and process control. Each...

flexible, rugged and easily programmable controllers to replace hard-wired relay logic systems. Dick Morley, who invented the first PLC, the Modicon 084, for...

electromagnetic relays with relay logic, fluidic logic, pneumatic logic, optics, molecules, acoustics, or even mechanical or thermal elements. Logic gates can...

contacts. Relay logic is the predecessor of ladder logic, which is commonly used in programmable logic controllers. A mercury relay is a relay that uses...

Field-programmable gate array Formal verification Ladder logic Programmable logic controller Relay logic Sequential logic Tseytin transformation Savant, C.J. Jr.; Roden...

the relay, and in some case, taps on transformers. In some solid-state relays, a simple microprocessor does some of the relay logic, but the logic is fixed...

the beginning of a theoretical basis for understanding control theory. Relay logic was introduced with factory electrification, which underwent rapid adaption...

theorem, electric circuit analysis, magnetism, resonance, control relays, relay logic, semiconductor diodes, electron current flow, and much more. Smoothly...

title block and frame as other engineering drawings. Relay logic line diagrams, also called ladder logic diagrams, use another common standardized convention...

exchange in the floors below that combined the vital relay based interlocking logic and non-vital control logic in one place. Such advanced schemes would also...

use the term "XOR" in the patent, but he implemented that operation in relay logic. In the example Vernam gave, the plaintext is A, encoded as "++---" in...

with one of the reeds latching the relay, and the other or others performing logic or memory functions. Most reed relays in the crossbar switching systems...

technology such as crossbar or reed relay, the register was often a system of analog electronics or even relay logic. The term "flash" or "hook flash" is...

for engineers and scientists Ladder logic, a language that simulates relay logic commonly used in programmable logic controllers MeVisLab, cross-platform...

tabulating run, counters could be assigned to a specific hole or, by using relay logic, to a combination of holes, e.g. to count married couples. If the card...

Early electrically powered computers constructed from switches and relay logic rather than vacuum tubes (thermionic valves) or transistors (from which...

full speed toward an obstruction. Another feature of the system was a relay-logic digital clock (dubbed the "digital crock") on the dispatch board, which...

given tabulating run counters were assigned specific holes or, using relay logic, combination of holes. Later designs led to a card with ten rows, each...

earlier, a rotor-based key generator called SIGCUM. It used electromechanical relays in its operation. Later, Bell informed the Signal Corps that they were able...

by electrical switching circuits. Eventually, vacuum tubes replaced relays for logic operations. Lee De Forest's modification of the Fleming valve in 1907...

an automobile plant. PLCs were programmed using ladder logic, a language simulating relay logic. Even today, PLCs, mechanical switches, and optical sensors...

electric relay logic was developed, it no longer became necessary for signalmen to operate control devices with any sort of mechanical logic at all. With...

more efficient. Electrification enabled sequential automation using relay logic. Henry Ford further revolutionized the factory concept in the early 20th...

addition. (The earlier IBM 601 and released in the same year IBM 602 used relay logic.) The IBM 603 was adapted as the arithmetic unit in the IBM Selective...

system was notably ahead of its time in that its phase detector was a relay logic implementation of the transistor circuits for phase/frequency detectors...

acknowledgment (a wink) to go ahead with dial pulsing. This was done with relay logic and discrete electronics. These voltage changes on the trunk circuit...

conductors and ground return, which were analyzed in the exchange by relay logic. In 1968, the system was used in the UK, in a brief excursion from standards...

patents on the use of transformers for building digital logic circuits in place of relay logic beginning in 1947. A fully developed core system was patented...

-12 V. Transmission line logic levels of SDTRL circuits (C Level) were high: 1 V, low: -1 V. Relay circuits used either of two logic levels (T Level) high:...