Allen-Bradley 1747-L531/E SLC 5/03 Processor Module
$123.00
$320.00
Description
Allen-Bradley 1747-L531/E SLC 5/03 Processor Module
The Allen-Bradley 1747-L531/E, also cataloged as the SLC 5/03 processor module, serves as the primary SLC 500 CPU utilized to execute program logic scheduling and I/O scan coordination across SLC 500 chassis platforms. It operates with integrated RS-232 (DF1) and DH-485 communication handling and maintains execution timing via a fixed backplane cycle.
Suffix Breakdown & Model Matrix
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1747-L531: SLC 5/03 processor base designation
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/E: Series revision level indicator
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No additional functional hardware variants are defined within this catalog number structure
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | 1747-L531/E |
| Brand | Allen-Bradley |
| Weight | 0.45 kg |
| Operating Temp | 0 to 60 deg C |
| Power Consumption | 500 mA at 5 V DC (backplane current) |
| Processor Type | SLC 5/03 |
| User Memory | 8 KB battery-backed RAM |
| I/O Capacity | up to 4,096 digital I/O / 180 analog I/O |
| Program Scan Time | 1 ms per K instructions |
| I/O Scan Time | approx. 0.225 ms |
| Communication Interfaces | RS-232 (DF1), DH-485 |
| Backup Memory | 1747-M13 EEPROM |
| Battery | 1747-BA lithium battery |
Backplane Execution & Deterministic Scan Control
The SLC 5/03 CPU implements fixed-cycle backplane arbitration where instruction execution is synchronized with I/O refresh cycles. Backplane current draw at 5 V DC defines chassis loading constraints, directly impacting slot allocation in 1746 chassis systems. RS-232 and DH-485 interfaces operate asynchronously to the scan cycle, allowing external DF1 devices to interact without blocking I/O processing queues.
Frequently Asked Questions (FAQ)
Q: Can the 1747-L531/E be hot-swapped within an active SLC 500 chassis?
A: No. CPU removal requires chassis power removal due to backplane signal and memory state coupling.
Q: How does backplane current affect module population limits?
A: Total chassis load must remain within backplane power budget; CPU consumes 500 mA at 5 V DC, reducing available current for I/O modules.
Q: Does firmware or memory configuration affect scan cycle timing?
A: Yes. Instruction density in 8 KB user memory directly impacts program scan time measured at approximately 1 ms per K instructions.
Field Installation Guidelines
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Install CPU only in slot 0 of a 1746 SLC chassis
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Verify backplane power integrity before insertion
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Maintain shield grounding continuity for RS-232 and DH-485 cabling
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Avoid routing communication lines parallel to high-noise motor conductors
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Ensure lithium battery (1747-BA) is installed prior to memory retention requirements
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Confirm chassis grounding impedance meets standard industrial control cabinet practice
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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