Allen Bradley PLC 3 by Rockwell Automation | DO Supply

PLC 3

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The PLC 3 Series of programmable logic controllers was among the first series of PLCs to be produced by Allen-Bradley in the 1980s. Many machines, factories, and plants still use these devices and there is still a demand for these PLCs and their spare parts because they are reliable and rugged. When they were launched, the PLC 3 series controllers were innovative in industrial automation functions that are applicable to standalone machines as well as to integrated production lines in a factory. The PLC 3 devices brought extraordinary flexibility and modularity to the programmable controller market, and they are designed to support larger automated systems with high-end processors.


The Allen-Bradley PLC 3 systems themselves can have 8 components that they use to acquire data, to send control signals, to deliver power to the connected modules, sensors, and actuators, and to communicate. These 8 main components are the main chassis processor, main processor modules, power supply, front panel, memory modules, industrial terminal, I/O scanner modules, and the expansion system. The main chassis on the PLC 3 system is designed to mechanically protect and group up to 6 modules, and they also have a front panel to check the whole system performance and diagnostics status. The front panels have keyboards and 16-digit alphanumeric displays. The PLC 3 power supplies are responsible for generating + 5 Volts, +15 Volts, and -15 Volts voltages to power all the modules that are installed in the main chassis. The program is loaded into the PLC 3 controllers by using an industrial terminal known as the Allen-Bradley 1770-T4 terminal. The I/O capacity of the PLC 3 systems is 4098 inputs and 4098 outputs.

PLC 3 Description Stock Level
1770-M11 The Allen-Bradley 1770-M11 Processor Mass Storage System comes with 120 to 240 Volts AC and 1.5 Amps of maximum operating...
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1775-54AA PLC-3-INTERFACE MOD
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1775-54AB PLC-3-INTERFACE MOD
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1775-54BA PLC-3-I/O SYSTEM
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1775-54BB PLC-3-I/O SYSTEM
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1775-A1 PLC-3-CHASSIS
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1775-A2 PLC-3-EXPANSION CHASSIS W/1775-CAP -AC -AD2
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1775-A3 PLC-3-PROCESSOR CHASSIS /1 0 115/230V 3/1.5AMP
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1775-AC PLC-3-CHASSIS W/O DR & FRT PLN
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1775-AD1 PLC-3-DOOR MAIN CHASSIS
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1775-AD2 PLC-3-RACK DOOR EXPANSION FOR
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1775-CM PLC-3-MEMORY COMMUNICATION CABLE ASSEMBLY
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1775-CX The 1775-CX expansion cable by Allen-Bradley is used for PLC-3 programmable controllers. It is made for rack/chassis...
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1775-CX-EA PLC-3-EXPANSION CABLE 10FT
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1775-GA PLC-3-COMMUNICATION MODULE PERIPHERAL PLC3
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1775-KA PLC-3-COMMUNICATION ADAPTOR MODULE DATA HWY
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1775-L1 PLC-3-MAIN PROCESS MODULE,LEVEL
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1775-L1B55B PLC-3-PROC MODULE
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1775-L2 PLC-3-MAIN PROCESS MODULE, LEVE
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1775-L3 PLC-3-CPU MODULE SINGLE SLOT PROCESSOR
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1775-L4 PLC-3-PROCESSOR MODULE /10 SPARE
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1775-LP8 PLC-3-CPU MODULE /10 32K SYSTEM
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1775-LPA PLC-3-PLC Module
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1775-LS PLC-3-PROCESSOR MODULE MINI PLC-2 SERIES
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1775-LX PLC-3- EXPANSION Chassis MODULE
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1775-LXA PLC-3-EXPANSION Module
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1775-M54 PLC-3-MEMORY MODULE
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1775-M58 PLC-3-MEMORY MODULE
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1775-MC4 PLC-3-CORE MEMORY 16K
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1775-MC8 PLC-3-PLC3 CORE MEMORY 32K WORDS
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1775-ME4 PLC-3-MEMORY MODULE ERROR CORRECT RAM 16K PLC3
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1775-ME8 PLC-3-MEMORY MODULE ERROR CORRECTING RAM PLC3
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1775-ME8A PLC-3-MEMORY MODULE
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1775-ME8B PLC-3-RAM MEM 32K WORD
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1775-MEA PLC-3-MEMORY MODULE ERROR CORRECTING RAM
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1775-MEAA PLC-3-RAM MEM 64K WORD
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1775-MED PLC-3-MEMORY MODULE ERROR CORRECTING RAM 128K
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1775-MEDA PLC-3-MEMORY
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1775-MEDB PLC-3-MEMORY
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1775-MEF PLC-3-MEMORY MODULE 256K ERROR CORRECTING
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1775-MEFA PLC-3-MEMORY 256K
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1775-MR4 PLC-3-16K CMOS RAM MEMORY MODULE
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1775-MR8 PLC-3-32K CMOS RAM MEMORY MODULE
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1775-MS4 PLC-3-MEMORY MODULE 16K /10
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1775-MS8 PLC-3-MEMORY MODULE ERROR CORRECTING RAM /10
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1775-MSA PLC-3-MEMORY MODULE ERROR CORRECTING RAM /10
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1775-MSD PLC-3-MEMORY MODULE ERROR CORRECTING 128K
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1775-MX PLC-3-MEMORY COMMUNICATION MODULE
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1775-MZ PLC-3-MEMORY COMMUNICATION MODULE
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1775-P1 PLC-3-POWER SUPPLY MODULE 6/3AMP 120/220VAC 47-63HZ
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1775-P2 PLC-3-POWER SUPPLY MODULE PLC3
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1775-P3 PLC-3-POWER SUPPLY MODULE /10
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1775-RM PLC-3-PERIPHERAL INTERFACE ADAPTER USE W/1775-GA PLC3
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1775-S4A PLC-3-I/O SCANNER PROGRAMMER INTERFACE
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1775-S4AA PLC-3-I/O PROG INTERFACE W/SWIN
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1775-S4AB PLC-3-I/O PROG INTERFACE W/SWIN
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1775-S4B PLC-3-INPUT/OUTPUT SCANNER MESSAGE HANDLING
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1775-S4BA PLC-3-I/O MESSAGE HANDL W/SWING
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1775-S4BB PLC-3-I/O MESSAGE HANDL W/SWING
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1775-S4BC PLC-3-I/O SCANNER
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1775-S5 PLC-3-COMMUNICATION MODULE 6AMP 5VDC
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1775-S5A PLC-3-I/O SCANNER MODULE
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1775-SR PLC-3-/10 SCANNER MODULE
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1775-SR5 PLC-3-SCANNER COMMUNICATION MODULE /10
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1775-SR5A PLC-3-SCANNER COMMUNICATION MODULE /10
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1775-WA PLC-3-TERMINAL CONNECTOR FUSED
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1775-WB PLC-3-PERIPHERAL COMMUNICATION MOD. TERMINAL WIRING ARM
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1775-XB PLC-3-ENCLOSURE FACE 30X19IN
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1775-ZB PLC-3- CONTROLLER HELP CARTRIDGE
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1775CXD PLC-3-EXPANSION UNIT
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1775L1A PLC-3-MAIN PROCES MOD, LEVEL 1
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1775L1B PLC-3-MAIN PROCES MOD,LEVEL 1 I
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1775L2A PLC-3-MAIN PROCES MOD, LEVEL 2
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1775L2B PLC-3-MAIN PROCESS MOD, LEVEL 2
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1775L2C PLC-3-MAIN PROCESS MOD, LEVEL 2
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1775L3A PLC-3-MICROPROCESSOR
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1775LP4 PLC-3-/10 W/16K
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1775P1A PLC-3- POWER SUPPLY
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1775P1B PLC-3- POWER SUPPLY
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1775SRS PLC-3-SCANNER MODULE
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1779-KP2 The 1779-KP2 communication interface module is part of the Bulletin 1779 product line and it is used with the PLC-2...
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1779-KP5 The 1779-KP5 interface module is designed by Allen-Bradley and it is part of the Bulletin 1779 product line. This module...
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PLC 3 Description Stock Level

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Allen-Bradley PLC 3 Modules