Allen-Bradley 1785-L40L PLC-5/40L Standard Processor
$123.00
$320.00
Description
Allen-Bradley 1785-L40L PLC-5/40L Standard Processor
Configured for sequential control execution and I/O data processing in PLC-5 DH+ / Remote I/O networks, the Allen-Bradley 1785-L40L (1785-L40L PLC-5/40L Standard Processor) provides direct physical/electrical execution for programmable controller operations. The module supports 48 kilowords of battery-backed SRAM, extended local I/O, and PLC-5 chassis communication functions.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | 1785-L40L |
| Brand | Allen-Bradley |
| Origin | United States |
| Weight | 3.35 lbs |
| Power Consumption | Backplane current: 3.3 A at 5 VDC |
| Module Type | Standard Processor |
| Processor Type | PLC-5/40L |
| Product Line | PLC-5 |
| User Memory | 48 Kilowords battery-backed static RAM |
| EEPROM Backup Support | Supported with 1785-ME16, 1785-ME32, 1785-ME64, and 1785-M100 modules |
| Protected Memory | Not supported |
| Maximum Total I/O | 2048 I/O points (any mix) or 2048 inputs + 2048 outputs complementary |
| Maximum Analog I/O | 2048 channels |
| Maximum I/O Chassis | 61 chassis total |
| Extended Local I/O Chassis | 16 maximum |
| Universal Remote I/O Chassis | 32 maximum per I/O link |
| Communication Ports | 1 x RS-232-C / RS-422-A / RS-423-A |
| Control Coprocessor Expansion Port | Supported |
EtherNet/IP and PLC-5 Bus Communication Characteristics
The 1785-L40L processor operates within PLC-5 control architectures using DH+ and Remote I/O communication structures. The processor manages scan execution, local rack updates, and remote I/O data exchanges through configured PLC-5 communication channels. I/O scan performance depends on rack type and communication rate, with specified scan times including 0.5 ms per external local rack and communication-dependent remote update intervals.
The processor supports I/O density scaling through PLC-5 chassis expansion. The architecture allows up to 2048 analog I/O points and configurable combinations of digital and analog modules according to the installed chassis arrangement.
Frequently Asked Questions
Q: Does the 1785-L40L support battery-backed memory retention?
A: Yes. The processor includes battery-backed static RAM for retaining user program and data memory during power interruption conditions.
Q: What type of I/O communication does the 1785-L40L support?
A: The processor supports DH+ and Remote I/O communication architectures with extended local I/O and universal remote I/O chassis configurations.
Q: Can the 1785-L40L use EEPROM program backup modules?
A: Yes. EEPROM backup capability is available using compatible 1785-ME16, 1785-ME32, 1785-ME64, and 1785-M100 memory modules.
Field Installation Guidelines
Install the processor module in the designated PLC-5 chassis slot according to the rack configuration requirements. Verify backplane power availability before insertion and removal procedures.
Route communication wiring separately from high-voltage power conductors and high-current switching circuits. Use shielded communication cables where required by the network installation design, with cable shields bonded according to site grounding practices.
Before commissioning, verify processor memory status, battery condition, I/O rack addressing, and DH+ / Remote I/O communication settings. Confirm that installed I/O modules match the configured processor addressing structure.
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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