Description
Allen-Bradley 1785-L40B PLC-5/40 Programmable Controller
The Allen-Bradley 1785-L40B is a powerful PLC-5 series controller from Rockwell Automation. Designed for medium to large automation applications, this processor delivers robust performance with extensive I/O capacity. It features multiple communication ports for flexible system integration.
Technical Specifications
- Brand: Allen-Bradley / Rockwell Automation
- Model: 1785-L40B
- Processor Type: PLC-5/40 Standard
- User Memory: 48 Kilowords
- Max I/O Capacity: 2048 points (any mix)
- Communication Ports: 4 DH+/Remote I/O, 1 serial (RS-232/422/423)
- Backplane Current: 3.3 Amps
- Power Dissipation: 17.3 Watts
- I/O Scan Time: 3-10 ms (depending on baud rate)
- Max Chassis: 61 total I/O chassis
- Remote I/O: 32 chassis per I/O link
- Battery: 1770-XYC for memory backup
- Operating Temperature: 0 to 60°C (32 to 140°F)
- Storage Temperature: -40 to 85°C (-40 to 185°F)
- Compatible Power Supplies: 1771-P4S, -P6S, -P4S1, -P6S1
Installation & Compatibility
- Installs in 1771-A1B, -A2B, -A3B, -A3B1, and -A4B chassis
- Supports up to 29 PLC-5 racks (1 local, 28 remote)
- Works with memory modules: 1785-ME16, -ME32, -ME64, -M100
- Four independent DH+/RIO networks possible
- Serial port enables point-to-point communication
Packaging & Shipping
- Includes 1785-L40B processor unit only
- Secure industrial packaging for protection
- Worldwide shipping via FedEx, UPS, and DHL
- 12-month warranty against defects
Frequently Asked Questions
- How many remote I/O racks can this controller support?
It supports up to 28 remote I/O racks in addition to the local rack. - What memory backup options are available?
EEPROM modules from 16K to 100K words: 1785-ME16, -ME32, -ME64, -M100. - Can all four communication ports operate simultaneously?
Yes, each port can run a separate DH+ or Remote I/O network. - What is the maximum number of I/O points per link?
Each I/O link supports up to 32 remote I/O chassis. - Does this controller support extended local I/O?
No, the 1785-L40B does not support extended local I/O chassis.
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