Allen-Bradley 1785-L40B PLC-5/40 Processor Module
$123.00
$320.00
Description
Allen-Bradley 1785-L40B PLC-5/40 Processor Module
Configured for PLC processing and distributed I/O execution in PLC-5 control platforms, the Allen-Bradley 1785-L40B (1785-L40B PLC CPU Module) provides direct physical and electrical execution through DH+/Remote I/O communication channels, serial interface handling, and processor memory operations.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | 1785-L40B |
| Brand | Allen-Bradley |
| Origin | USA |
| Weight | 3.00 lbs |
| Operating Temp | 0 to 60 deg C |
| Power Consumption | 17.3 W |
| Product Type | PLC CPU Module |
| Product Family | PLC-5/40 |
| Processor Type | PLC-5/40 Standard Processor |
| User Memory | 48 KWords Battery-Backed Static RAM |
| Maximum Digital I/O | 2048 (any mix) or 2048 inputs + 2048 outputs (complementary) |
| Maximum Analog I/O | 2048 |
| Backplane Current Load | 3.3 A |
| Embedded Communication | Four DH+/Remote I/O channels (Adapter or Scanner), one serial port |
| Serial Communication Standards | RS-232, RS-422A, RS-423 |
| EEPROM Backup Support | Supported with 1785-ME16, 1785-ME32, 1785-ME64, and 1785-M100 modules |
| Maximum I/O Chassis | 61 |
| Maximum Remote I/O Link | 32 chassis per I/O link |
| I/O Scan Time | 10 ms at 57.6 kbits/s, 7 ms at 115.2 kbits/s, 3 ms at 230.4 kbits/s |
PLC-5 Communication and Processor Architecture
The 1785-L40B processor operates within the PLC-5/40 architecture using DH+ and Remote I/O networks for controller-to-I/O communication. The four embedded DH+/Remote I/O channels support Adapter or Scanner configurations, allowing distributed I/O management without external communication modules.
The processor uses 48 KWords battery-backed SRAM for application storage and supports EEPROM program backup through compatible memory modules. Firmware operation is designed around PLC-5 instruction execution, I/O scanning, and deterministic controller processing.
The module supports PLC control expansion through the Control Coprocessor Expansion Port and provides one configurable serial communication interface for RS-232, RS-422A, and RS-423 connections.
Frequently Asked Questions (FAQ)
Q: What communication interfaces are integrated into the 1785-L40B processor?
A: The processor contains four DH+/Remote I/O communication channels and one configurable serial port supporting RS-232, RS-422A, and RS-423 standards.
Q: What memory configuration is available on the 1785-L40B?
A: The module provides 48 KWords of battery-backed static RAM for PLC application programs and supports EEPROM program backup using compatible memory modules.
Q: What I/O capacity is supported by this PLC-5 processor?
A: The processor supports up to 2048 I/O points in any mix or 2048 inputs plus 2048 outputs in complementary configuration, with up to 2048 analog I/O points.
Field Installation Guidelines
Install the 1785-L40B processor in a compatible PLC-5 chassis with the specified Allen-Bradley power supply modules. Verify backplane seating, module keying, and chassis grounding before energizing the system.
Route DH+/Remote I/O communication cables separately from high-voltage power conductors and high-current switching circuits. Use proper cable shielding and connect shields according to the control cabinet grounding practice to reduce electrical interference.
Before replacement or maintenance operations, confirm application memory backup status and verify EEPROM program availability when used. Check communication node configuration, serial port settings, and I/O addressing after installation.
Features
Minimum Order Quantity (MOQ)
We welcome bulk orders and have a minimum order quantity of just one unit.
Certificates and Documentation
Upon request, we can provide all necessary documentation, including Certificates of Origin/Conformance and other required export documents.
Delivery Time
For items in stock, we aim to deliver within 1-3 days after payment confirmation. Items with specified lead times will be delivered according to the quoted schedule.
Payment Methods
We accept 100% T/T (Telegraphic Transfer) payment before shipping. For items with lead times, a 30% deposit is required upfront, with the remaining 70% due before shipment. For RMB transfers, please contact us if you have an agent in China.
Warranty
We offer a standard one-year warranty on all new and original items. If you require an extended warranty, please contact us for additional cost details.
Refund and Return Policy
Your satisfaction is important to us. If you need to return an item, it must be done within 30 days of the order date. The product must be unused, unopened, and in its original packaging with all accessories included. Refunds are processed within 5-7 business days after we receive the returned item. Please note that shipping and related charges are non-refundable.
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