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The Allen-Bradley 1785L20B is a model number typically associated with programmable logic controllers (PLCs) from Rockwell Automation, specifically from their PLC-5 series.

1785L20B Allen-Bradley

Original price was: $3,705.00.Current price is: $2,850.00.

1 in stock

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Description

 Technical Specifications for 1785-L20B

Manufacturer Rockwell Automation
Product Type: Programmable Logic Controller
Backplane current load: 2.3 A
Embedded Communication interfaces: 1 DH+ (Fixed) 1 DH+/Remote I/O (Adapter or Scanner) 1. serial port, configurable for RS-232, 423, and RS-422A standards.
Memory: 16 Kwords
Battery: 1770-XYC
Maximum Number of I/O Racks: 4 (0-3)
Remote I/O: 12 chassis
Operating Temperature: EC 60068-2-1 (Test Ad, Operating Cold), IEC 60068-2-2.

(Test Bd, Operating Dry Heat), IEC 60068-2-14 (Test Nb, Operating Thermal Shock): 0…60 oC (32…140 oF).
Non-Operating Temperature: IEC 60068-2-1 (Test Ab, Un-packaged Nonoperating Cold). IEC 60068-2-2 (Test Bc, Un-packaged Nonoperating Dry. Heat) and IEC 60068-2-14 (Test Na, Un-packaged. (Nonoperating Thermal Shock) -40.85 o C (-40.185 o F).
Brand Allen-Bradley
Power Dissipation: 12 W
Power Supply: 1771-P4S, -P6S, -P4S1, -P6S1
Part Number/Catalog No. 1785-L20B
Product Family: PLC5
Module Type Standard Processor
Processor PLC-5/20
Max User Memory Words 16 Kilowords
Battery-Backed Static RAM Yes
EEPROM Program Backup Option (using 1785-ME16, -ME32, -ME64, and -M100) Yes
Protected Memory No
Max Total I/O 512 (any mix) or 512 in + 512 out (complementary).
Max Analog I/O 512
I/O Scan Time Per Rack 10 ms at 57.6 kbits/s, 7 ms at 115.2 kbits/s, and 3 ms at 230.4 mbits/s.
Max I/O Chassis Total 13
Max I/O Chassis Extended Local 0
Max I/O Chassis Universal Remote 12
RS-232-C/422-A/423-A Ports 1
Control Coprocessor Expansion Port Yes
UPC 10612598123978

 

The Allen-Bradley 1785L20B is a model number typically associated with programmable logic controllers (PLCs) from Rockwell Automation, specifically from their PLC-5 series. PLCs like the 1785L20B are used in industrial automation to control machinery and processes. Here’s a bit more detail:

  1. Model Number Breakdown:
    • 1785: This is the series number for PLC-5 controllers.
    • L20B: This part of the model number typically denotes specific features, capacities, or revisions within the series.
  2. Features:
    • PLC Functionality: It provides logic control for automation processes.
    • I/O Compatibility: Supports various input/output modules for interfacing with sensors, actuators, and other industrial devices.
    • Communication: Capable of communicating with other devices and systems, often through industrial communication protocols like Ethernet/IP, ControlNet, or DeviceNet.
  3. Applications:
    • Used in a wide range of industrial applications such as manufacturing, process control, utilities, and more.
    • Designed to operate reliably in harsh industrial environments.
  4. Legacy Status:
    • PLC-5 series, including the 1785L20B, is part of Rockwell Automation’s legacy products. While still supported, newer installations often prefer newer generations like the ControlLogix series.
  5. Availability:
    • Availability of parts and support may vary due to its status as a legacy product. Rockwell Automation provides migration paths and support for transitioning to newer platforms.

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