Thousands of OEM Automation Parts In Stock
Fast Global Delivery with Reliable Logistics
1 3

1785-LT Allen-Bradley Processor Module

Bulk Orders & Fast Shipping

Instant 10% Discount On Winter Banks Credit/Debit Cards EMI and CreditCard

Fast & Reliable Worldwide Shipping – Ready to Dispatch from Stock
In stock (98 units), ready to be shipped
  • Fast shipping
  • Return Policy
  • Lowest Price
  • Help Center 24/7

About the Product

🛠 Technical Specifications

Model Information

Parameter Specification
🔢 Part Number 1785-LT
🏢 Brand Allen-Bradley
🏭 Manufacturer Rockwell Automation
⚙️ Series PLC5 Classic Series
🧩 Processor Type Processor module (1785 series)
💾 Embedded RAM 6K Words, expandable up to 14K Words
🔢 Max I/O Capacity 3072 I/O points (any mix of inputs and outputs), with up to 3072 inputs and 3072 outputs
🔧 I/O Expansion Supports up to 4 local I/O racks and 3 remote I/O racks

Performance & Communication

Parameter Specification
⏱️ Program Scan Time 2 ms per K-word for bit logic, 8 ms per K-word (typical)
📊 Max Analog I/O 512 points
🔗 Built-in Communication Ports One standalone DH+ scanner (for both local and remote I/O), RS-232/RS-422/RS-423 communication ports
⚡ I/O Scan Time per Rack 10 ms at 57.6 kbits/s, 7 ms at 115.2 kbits/s, 3 ms at 230.4 kbits/s
📦 Memory Expansion Modules 4K RAM Expansion (1785-MR), 8K RAM Expansion (1785-MS), 8K EEPROM (1785-MJ)

Connectivity & Hardware

Parameter Specification
🔋 Battery 1770-XY
🔢 Max Number of I/O Chassis 93 (Maximum)
⚙️ Supported Hardware Addressing 2-slot, 1-slot, and ½ slot addressing
🔌 Control Coprocessor Expansion Port Yes
🔗 Max Remote I/O Per Link 32
🔒 Module Keying Between slots 40 and 42, and between slots 54 and 56
📍 Rack Location 1771 I/O chassis, in the left-most slot

Ports & Communication Interface

Parameter Specification
🔌 RS-232/RS-422/RS-423 Ports 1 port
📡 Local I/O Rack Type 16 or 32-point modules
📊 Max Analog I/O per Rack 512 points
🔗 Communication Interface DH+ channel for local and remote I/O communication
📈 Maximum I/O Chassis Extended Local None (0)
  • Quick Quotes: Receive pricing and availability fast from our dedicated customer service team.
  • Delivery: Expedited, freight, and international shipping available worldwide.
  • Warranty: NexAuto offers a 12-month warranty on all parts purchased from us, in addition to any manufacturer coverage.
  • Returns: 30-day return policy for defective or mismatched parts, ensuring peace of mind.
  • Payment: Flexible options including major credit cards, PayPal, and bank transfers.
  • Custom Calibration: Provide your specifications, and we’ll handle the rest with precision.
 View Product Details

Blog posts

View all blog