Allen-Bradley 1785-L40B | PLC5 Programmable Logic Controller

Specifications

  • Manufacturer: Allen Bradley

  • Product No.: 1785-L40B

  • Condition： 10 Items in Stock

  • Product Type: Programmable Logic Controller

  • Product Origin: USA

  • Payment:T/T, Western Union

  • Weight: 910g

  • Shipping port: Xiamen

  • Warranty: 12 months

Product details

Description

Product Overview

The 1785-L40B by Allen-Bradley is a high-performance PLC5 controller designed for medium to large automation applications. It integrates 48K words of user memory and supports up to 2048 I/O points, either in any mix or as 2048 input plus 2048 output in complementary configuration.

This controller features four DH+/Remote I/O ports and one configurable serial port supporting RS-232, RS-423, and RS-422A standards, enabling flexible communication with multiple networked devices. The 1785-L40B can manage a local rack and up to 28 remote I/O racks, offering extensive expandability for complex industrial systems.

With support for battery-backed static RAM and optional EEPROM program backup using Allen-Bradley 1785-ME modules, the 1785-L40B ensures reliable memory retention and program integrity in all operational conditions.

Technical Specifications

Specification Details
Brand & Model Allen-Bradley 1785-L40B
Product Type Programmable Logic Controller
Product Line PLC 5
Part Number 1785-L40B
Weight 3.00 lbs (1.36 kg)
Maximum User Memory 48 KWords
Maximum Total I/O 2048 (any mix) or 2048 in + 2048 out
Embedded Communication Interfaces 4 DH+/Remote I/O (Adapter or Scanner), 1 serial port (RS-232/423/422A)
Maximum I/O per Link 32
Power Supply 1771-P4S, -P6S, -P4S1, -P6S1
Power Dissipation 17.3 W
Backplane Current Load 3.3 A
Non-Operating Temperature –40…85°C (–40…185°F)
Operating Temperature 0…60°C (32…140°F)
Battery 1770-XYC
I/O Scan Time per Rack 10 ms @ 57.6 kbit/s, 7 ms @ 115.2 kbit/s, 3 ms @ 230.4 kbit/s
Maximum I/O Chassis Total 61
Max Remote I/O Chassis 32 per I/O link
Control Coprocessor Expansion Port Yes
EEPROM Program Backup Option Supported (1785-ME16, ME32, ME64, M100)

Features and Benefits

  • High I/O Capacity: Supports up to 2048 points or complementary 2048 in/out configuration.

  • Robust Communication: Includes DH+/Remote I/O ports and configurable serial port.

  • Memory Reliability: Battery-backed static RAM with optional EEPROM backup modules.

  • Expandability: Handles 1 local rack and up to 28 remote I/O racks.

  • Durable Design: Operates in wide temperature ranges with stable performance.

Applications

  • Medium and large industrial automation systems.

  • Manufacturing lines requiring high I/O capacity.

  • Networked PLC5 systems with remote I/O expansion.

  • Systems needing reliable memory retention and program security.

FAQ

Q1: How much user memory does the 1785-L40B support?
It supports 48K words of user memory for complex automation tasks.

Q2: What I/O capacity does this controller handle?
It supports 2048 points in any mix or 2048 input + 2048 output in complementary configuration.

Q3: Which communication interfaces are included?
Four DH+/Remote I/O ports and one configurable serial port (RS-232, RS-423, RS-422A).

Q4: Can the 1785-L40B handle remote I/O racks?
Yes, it manages 1 local rack and up to 28 remote I/O racks.

Q5: Does it support program backup?
Yes, with battery-backed RAM and optional EEPROM modules (1785-ME series).

 

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