Allen-Bradley 1785-L40B PLC5 Controller | Rockwell Automation PLC

Allen-Bradley 1785-L40B PLC5 Programmable Logic Controller

The Allen-Bradley 1785-L40B is a high-performance PLC-5/40 processor from Rockwell Automation. It delivers robust control for medium to large automation applications with its extensive I/O capacity and flexible communication options.

Key Technical Specifications

• Brand & Manufacturer: Allen-Bradley by Rockwell Automation
• Model: 1785-L40B (Complete Suffix Information: 1785-L40B)
• Product Family & Type: PLC5 Programmable Logic Controller
• User Memory: 48 Kilowords of Battery-Backed RAM
• Maximum I/O Capacity: 2048 points (any mix) or 2048 Input + 2048 Output (complementary)
• Analog I/O: Supports up to 2048 analog points
• Embedded Communication Ports:
  • Four (4) DH+/Remote I/O ports (Adapter or Scanner)
  • One (1) serial port configurable for RS-232, RS-423, and RS-422A standards
• Operating Temperature: 0 to 60 °C (32 to 140 °F)
• Non-Operating Temperature: –40 to 85 °C (–40 to 185 °F)
• Backplane Current Load: 3.3A
• Power Supply Compatibility: 1771-P4S, 1771-P6S, 1771-P4S1, 1771-P6S1
• Battery: 1770-XYC

Packaging & Delivery

• Your unit ships with the 1785-L40B controller.
• We use reliable global carriers like FedEx, UPS, and DHL for all orders.

Frequently Asked Questions (FAQ)

• Q: How many I/O points can the 1785-L40B control?
  A: It can manage up to 2048 I/O points in any combination or a complementary setup of 2048 inputs and 2048 outputs.
• Q: What is the memory capacity of this controller?
  A: It has 48K words of user memory, which you can back up with a battery and expand with EEPROM memory cards.
• Q: What communication ports are available?
  A: It has four DH+/Remote I/O ports and one configurable serial port for RS-232/422/423 communication.

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