1785-L20B

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Overview of Allen-Bradley 1785-L20B PLC-5/20 Processor Module Series C

The Allen-Bradley 1785-L20B is a PLC-5/20 processor module designed for medium-sized industrial control applications. It features 16K words of user memory and supports up to 2048 discrete I/O points. With two communication ports (RS-232 and RS-485), it supports protocols including DF1, Data Highway Plus (DH+), and ControlNet. The Series C version offers enhanced performance and additional firmware features over earlier versions.

Key Features of 1785-L20B

  • 16K words of user program and data memory.
  • Supports up to 2048 discrete I/O points and multiple I/O chassis.
  • Dual communication ports: RS-232 and RS-485 supporting DF1, DH+, and ControlNet.
  • Modular design compatible with PLC-5 I/O and communication adapters.
  • Efficient program scan and real-time processing for automation tasks.
  • Enhanced protocol support including optional Modbus and Profibus DP.
  • Robust operation in industrial environments with operating temperature range 0 to 60 °C.
  • Typical uses include manufacturing automation, process control, and remote I/O monitoring.

Technical Specifications

Specification Details
Processor Type PLC-5/20
User Memory 16K words
Discrete I/O Capacity Up to 2048 points
Communication Ports RS-232, RS-485
Communication Protocols DF1, DH+, ControlNet, optional Modbus, Profibus DP
Program Scan Time Fast, dependent on program size
Operating Temperature 0 to 60 °C (32 to 140 °F)
Power Supply 5 V DC (via chassis)
Dimensions Standard PLC-5 processor size
Weight Approximately 0.5 kg (1.1 lb)

Applications / Use Cases

The 1785-L20B processor is ideal for medium-scale automation systems in industries such as manufacturing, water treatment, and food and beverage processing. It offers versatile communication options and broad compatibility with I/O modules, enabling efficient control and monitoring for complex industrial processes.

1785-L20B

$0.00

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Does it come with a warranty?

Yes, All products are offered wth 1-Year warranty.

What is the condition of the product?

All products sold are New & Unused.

How fast is shipping?

All products are delivered within 2-8 business days depending on our stock location.

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