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Allen-Bradley 1785-LT3 PLC-5/12 Processor Module

Allen-Bradley 1785-LT3 PLC-5/12 Processor Module

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  • Manufacturer: Allen-Bradley

  • Product No.: 1785-LT3

  • Country of origin:สหรัฐอเมริกา

  • Product Type: Prosessor Module

  • Barcode: 8537101190

  • Payment: T/T, Western Union

  • Weight: 1337g

  • Dimensions: 34 mm x 315 mm x 198 mm (W x H x D)

  • Shipping port: Xiamen

  • Warranty: 12 months

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The 1785-LT3 is a PLC-5/12 Processor Module engineered to direct sequential control, automated processing operations, and comprehensive factory-floor data handling. This slot-mounted hardware component installs into the left-most slot of a standard 1771 I/O chassis, executing specialized ladder logic programs to manage complex system variables. Functioning as a standalone and adapter-capable device on industrial networks, the 1785-LT3 coordinates multi-node signals and diagnostic data via built-in physical connection interfaces.

Features

  • Seamless interlocking architecture designed exclusively for insertion into standard 1771 I/O chassis frames
  • Integrated rear switch assembly (SW1) enabling direct manual assignment of the physical station address
  • Multiple front-facing LED diagnostics providing continuous real-time verification of operational, communication, and battery conditions
  • Dedicated logic capabilities that execute bit-level instructions, advanced math functions, and automated runtime troubleshooting

Applications

  • Sequential manufacturing control networks
  • Machine-level diagnostic and execution systems
  • Distributed data acquisition nodes
  • Distributed control architecture utilizing peer-to-peer communication

Technical Specifications

Parameter Specification
Manufacturer Allen-Bradley
Catalog Number 1785-LT3
Processor Model PLC-5/12
Product Line Classic PLC-5
Module Type Processor Module
Memory Capacity 6 K words
Maximum Local Racks Supported 4 (1 resident chassis)
Maximum Remote Racks Supported None
I/O Capacity (8-point modules) 128 I/O
I/O Capacity (16-point modules) 256 I/O
I/O Capacity (32-point modules) 512 I/O
Program Scan Time (Bit Logic) 2 ms/K words
Program Scan Time (Typical) 8 ms/K words
Backplane Current Load 2.5 A
Communication Modes Standalone, Adapter
Network Interfaces DH+ (Data Highway Plus)
Optional Memory Modules 8K EEPROM (1785-MJ)
Battery Type 1770-XY lithium battery (or 3.6V AA Tadiran TL-5104 AEL/S)
Hardware Addressing Support 2-slot, 1-slot, 1/2-slot
Supported I/O Modules Bulletin 1771 I/O (8, 16, 32-point, and intelligent modules)
Module Location Slot 1771 I/O chassis, left-most slot
Keying Band Positions Between 40 and 42, Between 54 and 56
Time of Day Clock (Max Variation at 60 degC) Plus or minus 3 min per month
Time of Day Clock (Typical Variation at 20 degC) Plus or minus 20 s per month
Timing Accuracy One program scan
Typical Discrete Local I/O Scan 1 ms per local I/O rack
Weight 1337 g (42.15 oz.)
Operating Temperature 0 to 60 degC (32 to 140 degF)
Storage Temperature -40 to 85 degC (-40 to 185 degF)
Relative Humidity 5 to 95% (without condensation)
Operating/Non-operating Vibration 1 g @ 10 to 500 Hz (0.012 inches peak-to-peak displacement)
Operating Shock 30 g peak acceleration for 11 plus or minus 1 ms duration
Non-operating Shock 50 g peak acceleration for 11 plus or minus 1 ms duration

Connections/Interfaces

Connector Pin / Switch Function / Assignment
SW1 Switch Assembly Establishes the physical DH+ Station Address for Channel 1A
Battery Connector Built-in side connector mating to the 1770-XY battery pressure terminals
Memory Module Slot Front-accessible receiver accepting the optional 1785-MJ 8K EEPROM
CP Cable Connector Mating port interfaces directly with the industrial programming terminal cable

Installation Guidelines

  • Chassis Positioning: Always install the processor module into the dedicated, left-most slot of the 1771 I/O backplane chassis to ensure proper logic termination.
  • Keying Band Fitment: Position the hardware keying bands securely within the backplane rails between slots 40 and 42, and between slots 54 and 56 to verify correct module insertion.
  • Isolation Warning: Turn off all electrical supplies feeding the local I/O chassis or memory socket before mounting the hardware or sliding an EEPROM into the slot to eliminate major diagnostic faults or data corruption.
  • Ground Infrastructure: Bond a dedicated grounding electrode conductor from the I/O chassis enclosure wall star washer directly to the main plant earth ground bus to minimize industrial EMI.

Compliance and Certifications

  • CSA certified
  • CSA Class I, Division 2, Groups A, B, C, D
  • UL listed

Product Documentation

Technical Datasheet (PDF) Complete specifications and technical drawings.

Technical Datasheet

Allen-Bradley 1785-LT3 PLC-5/12 Processor Module

What is the backplane power requirement for this device?

The module requires a backplane current draw of 2.5A from the local chassis power supply assembly.

Which specific slots must be keyed for this hardware installation?

The mechanical keying bands must be placed between positions 40 and 42, and between positions 54 and 56 within the chassis.

What is the maximum program memory limit of the processor module?

The device contains a fixed internal memory capacity of 6K words to hold user applications and program instructions.

What happens if a memory module is handled while the system has power?

Inserting or removing the EEPROM module while power is applied can cause a complete loss of program memory and trigger a permanent processor major fault.

การจัดส่งด่วนทั่วโลก

  • การจัดส่งมาตรฐาน: 4-6 วันทำการ ผ่าน DHL, FedEx และ UPS
  • จัดส่งด่วน: จัดส่งในวันเดียวกันสำหรับคำสั่งซื้อที่มีในสต็อกและสั่งก่อนเวลา 14:00 น. (GMT+8)
  • ครอบคลุมทั่วโลก: ให้บริการมากกว่า 150 ประเทศ รวมถึงการจัดส่งด่วนไปยังซาอุดีอาระเบียและสหรัฐอาหรับเอมิเรตส์

การคืนสินค้าและการรับประกัน

  • การรับประกัน 30 วัน: รับคืนสินค้าที่มีในสต็อกในบรรจุภัณฑ์เดิมที่ปิดผนึกจากโรงงาน
  • การรับประกัน 12 เดือน: อะไหล่อุตสาหกรรมทุกชิ้นได้รับการรับประกันทางเทคนิคจากผู้เชี่ยวชาญของเรา

คำสั่งซื้อจะถูกดำเนินการและจัดส่งในวันจันทร์ถึงวันศุกร์ (ไม่รวมวันหยุดราชการ)


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TECHNICAL SPECIFICATIONS

Color pattern
สีดำ
Country of origin
สหรัฐอเมริกา
Power source
ไฟฟ้ากระแสตรง

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