| Brand | Allen-Bradley |
| Series | PLC-5/40 Series B |
| Module Type | Processor Module |
| User Memory | 48K Words (Battery-Backed SRAM) |
| Manufacturer | Rockwell Automation |
| Max I/O Chassis | 61 |
| Total I/O Capacity | 2,048 points (any mix or complementary) |
| Analog I/O Capacity | 2,048 points |
| Communication Ports | 4 DH+/Remote I/O channels, 1 configurable serial port (RS-232-C/422-A/423-A) |
| EEPROM Program Backup | Supported (1785-ME16, -ME32, -ME64, -M100) |
| Backplane Current Load | 3.3 Amps @ 5 VDC |
| I/O Scan Time per Rack | 10 ms @ 57.6 kbit/s, 7 ms @ 115.2 kbit/s, 3 ms @ 230.4 kbit/s |
| Part Number/Catalog No. | 1785-L40B |
Does the Allen-Bradley 1785-L40B come with a warranty?
Yes. The 1785-L40B is backed by our 24-Month Replace Industrial Warranty, with no rush fees or hidden warranty charges. If a unit fails under normal use within the warranty period, we repair or replace it.
Is this 1785-L40B a genuine Allen-Bradley part?
The 1785-L40B is sourced and verified independently. Replace Industrial, LLC is not a Rockwell Automation Authorized Distributor, and all warranties are provided directly by Replace Industrial.
Is the Allen-Bradley 1785-L40B new or used?
We offer the 1785-L40B in multiple conditions, from unused surplus to professionally reconditioned units. Every option is sourced and verified independently and covered by our 2-year replacement warranty.
What is the Allen-Bradley 1785-L40B?
The 1785-L40B is an Allen-Bradley PLC-5 Processor Module.
How fast does the 1785-L40B ship?
In-stock orders for the 1785-L40B ship the same day when placed before our daily cutoff. Expedited and same-day air options are available if you are facing downtime, with no rush fees. Our team is based in Raleigh, North Carolina.
1785-L40B
The Allen-Bradley 1785-L40B is a robust PLC-5/40 Series B processor module designed for efficient control in industrial automation systems. It features 48K words of battery-backed static RAM with optional EEPROM program backup using modules like 1785-ME16, -ME32, -ME64, and -M100. The module supports up to 2,048 total I/O points—including complementary configurations—and 2,048 analog I/O points. It offers four DH+/Remote I/O channels, a configurable RS-232-C/422-A/423-A serial port, and a backplane current load of 3.3 Amps at 5 Volts DC. With fast scan times per rack (3 to 10 ms depending on speed) and support for up to 61 I/O chassis, the 1785-L40B ensures reliable and scalable performance for complex automation tasks.
All products are covered by our 2-Year (24-Month) Replace Industrial Warranty. If a unit is found defective under normal use within the warranty period, we repair or replace it at no additional cost, and a unit may be returned for a full refund within 30 days if returned in the same condition it was sent.
Replace Industrial is an independent distributor and does not convey the manufacturer's warranty; all warranties are provided by Replace Industrial alone. Read the full warranty policy
We repair a wide range of industrial automation equipment, including PLCs, HMIs, drives, servo motors, switches, and circuit breakers, with rush service for critical downtime. Request a quote, ship your unit, and we diagnose, repair, and return it. Request a repair quote
Our standard shipping method is UPS Ground. We can also ship on your FEDEX or DHL account.
We can ship many items our the same day via Overnight or 2 Day Shipping.
We currently only collect tax from customers in the state of North Carolina. If you are exempt on your purchase, please email your Sales Tax & Use Exemption Form to sales@replacenc.com.
If you are checking out via a quote we send you, there is an option to upload your form at the time of purchase.
If you have already placed an order, please send us your form and we can refund the charged taxes.
